To create in your house comfortable conditions in the summer, we strive to cool the air into the home, installing air conditioners. When it is necessary to reduce the temperature in 2 or 3 rooms, we set as many coolers or split systems. And what if you need to maintain coolness in a large private house, and even with two or three floors? For such purposes, instead of air conditioners, the Chiller-Funkyl climate system is used. About what it is and how it works, will be discussed in this material.
Modern chiller system - Fan coil is designed to maintain temperature regime within the entire building year-round. That is, the system can provide both cooling and heating of the air. At the same time, the temperature in the rooms can be adjusted in accordance with the wishes of the homeowner. IN summer time The main role is played by the cooling device - Chiller. His task is to work out cold and submit it inside the building using pipelines with a coolant that in winter the role of the coolant plays.
As a coolant, there is usually ordinary purified water, less often - non-freezing substance - ethylene glycol. The latter in its heat capacity is not inferior to water, because it is successfully used instead of both in the cooling system and heating. Further, in the pipes, the water with low temperatures enters another heat exchange unit - fan coil installed in each room. In his heat exchanger, the water heats up, passing his cold room air, after which it returns back to Chiller.
In fact, the main elements of the chiller-funk system are reminded by the parts of the air conditioner, the outdoor unit (chiller), internal block (Fan coil) and connecting their pipelines with a refrigerant. Only instead of freon through pipes flowing water, and internal blocks can be as much as you like, it depends on the cooling capacity of the chiller.
Since the work of the chiller depends on the need in a cold, and it is inconstant, then in the intermediate hydraulic circuit module there is a container - a battery for a coolant, and an expansion tank is connected to the supply pipeline to the supply pipeline. The need for pump to pump the coolant is obvious, which is shown in the scheme.
Compound of chiller and fan coils through hydraulic module
As mentioned above, this climate system refers to the air and in winter it can work on the heating of the premises, only the refrigerant, cooling air, becomes the coolant and is heated by the boiler installation. Due to this, such schemes are involved in maintaining a microclimate in buildings of large shopping centers, cinemas and other buildings with large dimensions.
Chiller varieties
It must be said that Freon in the system is still present and it is located inside the refrigeration machine. That is, the principle of the operation of the chiller, as well as the air conditioner, is to transfer heat to the working body (freon) from one environment to the other. In our case, the heat is selected by the chiller evaporator from water heated in the fan coil and is transmitted to the ambient air or again water, which serves as a kind of intermediary - a condensing unit cooler.
Recall that Freon is gas that is translated under standard conditions into a liquid aggregate state. This property uses the chiller device, where freon evaporates in the heat exchanger - evaporator. This is due to the extraction of energy for the vaporization of water heated in the fan coil. As a result, the latter again goes to the air cooling building, and the Freon, the compressor, enters the second heat exchanger - the condenser where it is cooled and returns to the liquid state.
The condensation process in the second heat exchanger is most often under the influence of the outer environment, this principle uses air-cooled chiller. To achieve the high efficiency of the process, the air is processed immediately through several radiators using axial fans providing a demanding consumption.
In climatic systems of large buildings, water-cooled chillers are often involved, whose principle of action is not much different from the air unit. Only here for the condensation of freon installed another type of heat exchanger, in which the water circulates, it serves as a cooler instead of air.
Water-cooled installation principle
As a result, it turns out a more expensive and complex scheme with an additional water cooling circuit, but the cooling capacity of such a system is higher than in the air. The complexity and high costs arise due to the fact that the cooling capacitor itself can also be cooled, but now with air, and for this requires an additional installation - a cooling tower (drier). It functions simply: water passes through several radiators, each of which has a high-performance axial fan, running through it a powerful air flow.
The principle of Fan Coil
Having understood in the work of Chiller, we turn to consideration what fan coil is. This device that provides heat exchange process within each room. Its task is to maintain the temperature of the air at a given level, for this purpose the unit is equipped with the necessary devices and automation tools.
It operates according to the same scheme as the drier: through an aluminum radiator, inside of which water circulates, the axial fan is driven by air flow. Having passed through the edges of the heat exchanger, it gives thermal energy to water, and it is cooled and returns to the room. The funkyl operating scheme is shown below in the figure.
1 - panel for connecting electrical equipment; 2 - the unit of the unit in the ceiling version; 3 - fan; 4 - aluminum or copper heat exchanger; 5 - Bath for condensate; 6 - air valve with filter; Connecting the tube and the condensate pump.
Since the work of fan coils in the summer is associated with a large consumption of cooled air massIn the design of the unit there is a special container for the accumulation of condensate and a small pump, pumping it into the sewer. In addition to the ceiling version of the fankyl depicted in the diagram, there are channel and wall models of devices.
In contrast to the heating system, the compound of chiller with fan coil is carried out by pipelines covered with thermal insulation, otherwise the efficiency of the entire system will significantly decrease.
The area of \u200b\u200bany housing or public building is divided into climatic zones with different temperature regime. For this reason, each zone must serve one or group of fan coils having the same automation settings. The total amount of fan coils is determined by the calculation at the stage of development of the scheme.
It should be noted that without the correct calculation and designing of the system, it is not necessary to do here, since all the equipment listed has a very decent cost. The error price is too high, since an incorrectly chosen chiller for cooling water or fankyl into one or another room will not be able to provide the desired microclimate, and to redo everything will be very expensive.
Conclusion
Chiller systems - Fan coil differ effective work and energy savings, for the production of 3 kW cold, it is necessary to approximately 1 kW of electricity. But the design, acquisition of equipment, as well as installation and maintenance of fan coils and chiller require considerable investments.
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Quite difficult to understand everything that is in the world. And it is almost impossible to be a professional in all areas of science and technology. However, on the debt of the service, for training purposes, or simply to increase their own awareness, we need to quickly get a maximum of information about a device or process, easy and accessible to non-professional, form. For these purposes, there are so-called "manuals for teapots", that is, for those who need to quickly understand what this is speech And how it works. We will analyze such instructions and consider the principle of the work of the chiller (for teapots).
What it is
Chiller (or differently) is an aggregate to create an artificial cold and transfer it to the appropriate farmers. In the role of such, as a rule, conventional water is, less often - brines (solutions of salts in water). Etymology of the word belongs to english language, to the verb to Chill (English) - cool, and formed from it noun Chiller (English) - cooler. Refrigerator can be two different types. There are parocompression and absorption chiller. The principle of operation of each of them is significantly different.
Cool always
The main task of any refrigeration unit is to receive a cold in artificial conditions, that is, where it is impossible to be done by nature (frekuling). It is clear that in winter, with a deep minus on the street, will not be much difficulty. But what to do in the summer when the ambient temperature is much higher than we need? A chiller comes to the rescue. The principle of operation is based on the use of special environments created by certain substances (refrigerants). They have the ability to select heat from another medium (that is, cooling it) when boiling, to transfer and allocate it to another environment during condensation. During the operation of the refrigeration cycle, such refrigerants change their phase (aggregate) state from liquid to gaseous and back.
Heat exchangers
Any refrigerator can be divided into two zones: low and high pressure. Regardless of the type, in any chiller there will always be two heat exchanger: the evaporator - in the low pressure zone and the condenser - in the high pressure zone. Without these two components, the system will not be able to work chiller. The principle of operation of such heat exchangers is based on the thermal conductivity (conduction), that is, the transmission of heat from one medium to another through the wall separating these two media. The evaporator of the refrigerating machine gives the developed cold to the system to the consumer, and the condenser either resets the reserved heat into the environment, or sends it to recovery (heated the first stage of the DHW, warm floors, etc.).
How does it work
Consider a standard parokompression chiller. The principle of operation of such a refrigeration machine is theoretically based on the compressor increases the pressure of the gas, simultaneously lifting its temperature. Hot gas under high pressure is supplied to the condenser, where he is involved in the heat exchange process with a different medium of a lower temperature. As a rule, it is either water (brine) or air. Here, the gas is condensed into the liquid, in the process of which the excess heat is released, which is given to the cold carrier and allocated, therefore, from the consumer. Next, the fluid enters the throttling device, where the pressure is reduced in the system with an appropriate temperature drop. After that, partially boiling into the liquid comes directly into the evaporator, which is also an important part of the Chiller-Funkyl system. The principle of the evaporator is similar to the condenser. Here there is a heat exchange between the cooling carrier (which takes cold in Fan coil) and the refrigerant, which begins to pour and takes the heat from another medium. After the evaporator, the gas enters the compressor, and the cycle is repeated.
Absorption chiller
The operation of the compressor in the park compression cycle requires significant costs of electricity. However, there are already equipment that allows you to avoid these spending. Consider the principle of operation of the absorption chiller. Instead of the compressor, a system for increasing the pressure based on an absorbent agent using a heat source that is summed out from outside is used. Such a source can serve as hot steam, hot watereither thermal energy From burning gas or other fuel. This energy goes to rectification or evaporation of the absorbent, in the process of which the pressure of the refrigerant increases and it is supplied to the condenser. Further, the cycle works similarly to a parotic compression, and after the evaporator, the refrigerant gaseous refrigerant is fed to the absorber heat exchanger, where it is mixed with absorbent. Ammonia is used as an absorbent (in the water-ammonia chillers) or (bomistlyolithic ABCHM).
System "Chiller-Funkyl"
The principle of operation is based on the preparation of air in special seminals-closers, fan coils (from the words Fan (English) - fan and coil - coil), which are installed in air ducts before its direct distribution to the serviced room. The advantages of such systems in front of central air conditioning is that in each room you can support different air parameters (temperature, humidity, mobility), depending on the designation of the room and calculating the heat balance. And although air from the supply unit is sometimes skipped through the closers for its final processing, that is, the same as in the Chiller-Funkyl system, the principle of operation of the described systems is noticeably different.
Multi-member climatic system Chiller-Fan Coil is designed to create comfortable conditions inside the building big Square. It works constantly - in the summer it supplies cold, and in winter warm, warming the air to a predetermined temperature. With her device should meet, agree?
In the proposed article describes in detail the design and components of the climate system. Methods for connecting equipment are also presented and detailed. We will tell how this thermoregulation system is arranged and functions.
The role of the cooling device is assigned to chiller - an external unit producing and the feeding cold on pipelines with water circulating on them or ethylene glycol. It is different from other split systems, where freon is injected as a coolant.
For the movement and transmission of freon, refrigerant, you need expensive copper pipes. Here, with this task, plumbing pipes with thermal insulation are perfectly cope. It does not affect the temperature of the outdoor air, while Split systems with freon lose their performance already at -10⁰. The internal heat exchange unit is fankyl.
It takes a low temperature fluid, then transmits cold to the air medium, and the heated fluid returns back to the chiller. Fan coat is installed in all rooms. Each of them works on an individual program.
The main elements of the system - pumping station, Chiller, Fan Coil. Fan coil can be installed at a high distance from Chiller. It all depends on what force the pump has. The number of fan coils is proportional to the power of chiller
Typically, such systems are used in hypermarkets, trading complexes, structures raised under the ground, hotels. Sometimes they are used as heating. Then, according to the second contour, heated water is served in fan coat or switch the system to the heating boiler.
Design design system
According to the structural execution of the chiller-folkyl system, there are 2-pipe and 4-pipe. Installation type features wall-mounted devices, outdoor, embedded.
Rate the system for such basic parameters:
- power or chiller cooling capacity;
- fan coil performance;
- air mass movement efficiency;
- length of highways.
The last parameter depends on the strength of the pumping installation and the quality of pipe heat insulation.
Gallery of images
Chiller is called a full-featured refrigeration unit intended for cooling water, as well as non-freezing solutions that are used in air conditioning systems - supply installations, fan coils, central air conditioners, other applied processes. Chillers are used as a heat pump, as well as in order to heal water in the cold time. Chillers have a wide range of cooling capacity, as a result of which they are used in air-conditioning systems of small objects (apartments, cottages, small shops) and large construction (office, manufacturing and other buildings). In addition, chillers are used in the food industry in order to cool water, various drinks, in the sports and wellness area - to cool the ice platforms and rinks, in the pharmaceutical sphere - to cool the medicines. The modern market is represented by several types of chillers from the point of view of constructive performance: chillers with water and air cooling of the capacitor, the last types of chillers got the greatest distribution, since they are intended for outdoor installation.
The principle of the work of Chiller Based on the process of cooling the main component of this unit. Superheated refrigerant pairs having a low pressure coming out of the evaporator, entering the compressor and simply cool the winding of its electric motor. Couples of refrigerant in the compressor shrinks, while for lubrication, cooling and sealing of gaps into the compressor injected oil. Hot high-pressure steam, leaving the compressor, enters the air cooled capacitor, in which it is evenly distributed through the contours of the heat exchanger and gives the cooled outer air heat, and itself condenses. Before leaving the capacitor, the liquid refrigerant is supplied to the monochloride, where its temperature decreases below the saturation point, which increases the efficiency of the cycle. Passing through a highly efficient filter desiccant, where moisture is removed from the supercooled liquid freon, the refrigerant enters the thermal lifting valve, where it is throttled, partially evaporated due to its own heat of the fluid. By the end of the process of expansion, the refrigerant is a mixture of a pair and a low pressure fluid entering the evaporator and evenly distributed through its tubes. Next, moving through the evaporator, the refrigerant boils, taking heat in cooled water, as a result of which purchased a vapor-shaped state. Couples of the refrigerant, which reached the overheating state comes out of the evaporator, after which the cycle is repeated again.
The chiller refrigeration circuit circuit consists of
Compressor
Four-chassing valve reversal of the refrigeration cycle used in thermal pumps
Heat exchanger condenser
Capillary tube
Heat exchanger evaporator.
How the automated control system operates in the chiller
Chillers, principle of work which are based on cooling or fluid heating, are equipped with an automated control system, which consists of a controller, control panel, protection means. The controller is designed to control the operation of the compressor itself, the condenser fans, the four-chassis valve reversing the refrigeration cycle.
In the process of increasing the water temperature in the circuit of the air conditioning system, the responsibility of the controller is the inclusion of the chiller compressor, cooling water in the air conditioning system. When the water temperature decreases in the hydraulic circuit, the temperature of the temperature setting is less than the temperature difference value - the regulatory delta, the built-in automated control system suspends the operation of the compressor. Consequently, the controller provides high reliability of the compressor, as well as other elements of the refrigeration circuit throughout the entire operation time of the installation.
Chiller's choice is a serious question that requires a competent solution. Of course, to select the refrigeration unit there is no need to know all the nuances and the subtleties of the refrigeration machine, but the knowledge of the basic principles of the unit will help to quickly choose the desired model.
Cheaper, however, create a small air pressure, as a result of which a chiller equipped with an axial fan is placed only in an open area (roof, building wall, in other similar places). Centrifugal fans create a stronger air pressure, which means chillers equipped with such fans, can be placed inside the room, providing fence and emissions of air through air ducts.
We looked at the principle of Chiller's action. Equipment that is supplied by Peter Cold can be found in enterprises in regions such as: Moscow St. Petersburg Ekaterinburg Rostov-on-Don Kazan Krasnodar Nizhny Novgorod Volgograd Ufa Voronezh Chelyabinsk Penza Samara Togliatti Orenburg Tver Sochi Belgorod Perm, Smolensk, Vladimir Voskresensk Cheboksary Saratov Kursk Novocherkassk Yaroslavl Chernogolovka Izhevsk Kirov Astrakhan Ryazan Kurgan Surgut Ulyanovsk Tyumen Kostroma Lipetsk Kaluga in Mari El Dimitrovgrad Kamensk-Zhukovsky Naberezhnye Chelny Yeisk Ivanovo Nizhnevartovsk Podolsk Tambov Armavir Magnitogorsk Mordovia Miass Novorossiysk Kalmykia Khanty-Mansiysk Bryansk Volzhsky Syzran Nizhniy Tagil Taganrog Eagle Leningradskaya in Leningrad Region in Len Region Zheleznogorsk Vsevolozhsk Vyborg Gatchina Kirishi Sosnovy Bor Tikhvin Cherepovets Volkhov Veliky Novgorod in Novgorod Region in Nenets Petrozavodsk in the Republic of Komi Arkhangelsk Vologda Murmansk Syktyvkar Severodvinsk Kaliningrad in the Kaliningrad region of Kondopoga sorted in the Ivanovo region Obninsk in the Lipetsk region Elektrostal Volga region Dzerzhinsk Sarov Vyksa in the Nizhny Novgorod region Orsk in Perm region Berezniki Neftekamsk Salavat Almetyevsk Bugulma Nizhnekamsk Zhigulevsk Balocho Engels in Tatarstan in Penza region in Bashkortostan in the Ulyanovsk region in Chuvashia Glazov Sarapul Dmitrov South Vladikavkaz in Adygea Anapa Tuapse Volgodonsk Mine in Kalmykia Krasnodar Territory Gelendzhik Yalta Siberia Irkutsk Barnaul Bratsk Ust-Ilimsk Kemerovo Novokuznetsk Krasnoyarsk Norilsk Altai Krai Altai in the Krasnoyarsk Territory Novosibirsk Tomsk Omsk in Buryatia Ulan-Ude in Tsyva in Khakassy in the Far East Blagoveshchensk Belogorsk Vladivostok Ussuriysk Khabarovsk in the Jewish region Kamchatsky Krakatska Magadan in Sakha on Chukotsk South - Sakhalinsk in Primorye in the Khabarovsk Territory Yakutsk in the North Caucasus North Caucasus In Chechnya Essentuki Kislovodsk Mineral waters Pyatigorsk in Karachay-Cherkessk Cherkessk in Stavropol in Dagestan in Ingushetia IV North Ossetia Alanya in Kabardino-Balkaria in the Urals Pervouralsk Tobolsk Nefteyugansk Ozersk in Chelyabinsk region in Khanty-Mansi district New Urengoy Noyabrsk Salekhard in Yamalo-Nenets district Udmurtsk In Udmurtia
What ? Chiller is a refrigeration unit used for cooling and heating of liquid coolants in central air conditioning systems, which can be in suction installations or fancoils. Basically, the chiller for cooling water is used in production - cooled different equipment. In water better characteristics Compared with a mixture of glycol, so water work is more efficient.
A wide range of power makes it possible to use a chiller for cooling indoors of various sizes: from apartments and private houses to offices and hypermarkets. In addition, it is used in the food industry for and drinks, in the sports and health sphere - for cooling rollers and ice platforms, in pharmaceuticals - for cooling medicines.
There are the following main types of chillers:
- monoblock, air capacitor, hydromodul and compressor are in one case;
- chiller with a remote condenser on the street (the refrigeration module is located in the room, and the condenser is taken out to the street);
- chiller with a water capacitor (use when the minimum dimensions of the refrigeration module are needed and there is no possibility to use a remote condenser);
- thermal pump, with the possibility of heating or cooling the coolant.
The principle of the work of Chiller
The theoretical basis on which the principle of operation of refrigerators, air conditioners, refrigeration units is built, is the second beginning of thermodynamics. Cooling gas (Freon) in refrigeration installations makes the so-called reverse renkina cycle - a variety of inverse croan cycle. At the same time, the main heat transfer is not based on compression or extension of the carno cycle, but on phase transitions - and condensation.The industrial chiller consists of three main elements: compressor, condenser and evaporator. The main task of the evaporator is a heat removal from the cooled object. For this purpose, water and refrigerant are passed through it. Zakuya, the refrigerant takes the energy from the liquid. As a result, water or any other coolant is cooled, and the refrigerator agent is heated and passes into a gaseous state. After that, the chipped refrigerator agent enters the compressor, where he acts on the winding of the compressor electric motor, contributing to cooling. There, hot steam is compressed, again heating to a temperature of 80-90 ºС. Here it is mixed with the oil from the compressor.
In the heated state, the freon enters the condenser, where the heated refrigeration agent is cooled by the flow of cold air. Then the final cycle occurs: the refrigerant of the heat exchanger falls into the supercooler, where its temperature is reduced, as a result of which the freon goes into a liquid state and is fed into the filter-desiccant. There he gets rid of moisture. The next point on the way of movement of the refrigerant is a thermal lifting gate, in which the pressure of freon decreases. After leaving the thermal engineer, the refrigerant is a low-pressure pairs in combination with a liquid. This mixture is supplied to the evaporator, where the refrigerant boils back, turning into steam and overheating. Superheated couple leaves the evaporator, which is the beginning of a new cycle.
Industrial Chiller Work Scheme
# 1 Compressor (Compressor)
The compressor has two functions in the refrigeration cycle. He compresses and moves a pair of refrigerant in a chiller. When compressing vapors, pressure and temperature increases. Next, the compressed gas enters where it is cooled and turns into a liquid, then the liquid enters the evaporator (at the same time its pressure and temperature decreases), where it boils, goes into a state of gas, thereby taking heat from water or fluid that passes through the evaporator Chiller. After that, the refrigerant pair come again to the compressor for repetition of the cycle.
# 2 Air Cooling Condenser (Air COOLED CONDENSER)
Air-cooled condenser is a heat exchanger where heat absorbed by the refrigerant is highlighted in the surrounding space. The condenser usually comes compressed gas - freon, which is cooled to and condensed, goes into the liquid phase. The centrifugal or axial fan feed the air flow through the condenser.
# 3 High Pressure Relay (High Pressure Limit)
Protects the system from overpressure in the refrigerant circuit.
# 4 High Pressure Pressure Gauge (High Pressure Pressure Gauge)
Provides visual indication of refrigerant condensation pressure.
# 5 Liquid Receiver (Liquid Receiver)
Used to storing freon in the system.
# 6 Filter DRIER (Filter Drier)
The filter removes moisture, dirt, and other refrigerant foreign materials, which will damage the refrigeration system and reduce efficiency.
# 7 Solenoid Solenoid (Liquid Line Solenoid)
Solenoid valve is just an electrically controlled shut-off crane. It controls the refrigerant flow, which is closed when the compressor is stopped. This prevents the liquid refrigerant to enter the evaporator, which can cause hydrate. Hydroat can lead to serious damage to the compressor. The valve opens when the compressor is turned on.
# 8 Viewing Glass (Refrigerant Sight Glass)
Looking glass helps to observe the flow of a liquid refrigerant. Bubbles in the fluid flow indicate the lack of refrigerant. The humidity indicator provides a warning if the moisture enters the system, indicating that maintenance is required. The green indicator does not signal any moisture content. And the yellow signals of the indicator that the system is contaminated with moisture and requires maintenance.
# 9 thermostatic valve (Expansion Valve)
The thermostatic valve or TRV is a regulator, the position of the regulator (needle) of which is due to the temperature in the evaporator and the task of which is to regulate the amount of refrigerant supplied to the evaporator, depending on the overheating of the refrigerant vapor at the exit of the evaporator. Consequently, at any time he must serve only the amount of refrigerant in the evaporator, which, taking into account the current working conditions, can completely evaporate.
# 10 hot airpasse valve gas (Hot Gas Bypass Valve)
Hot Gas Bypass Valve (Performance Regulators) are used to bring the performance of the compressor to the actual load on the evaporator (installed in the bypass line between the low and high pressure sides of the cooling system). Hot gas bypass valve (not included in the standard cleaning of chillers) prevents the compressor shortly cycling by modulating the compressor power. When activating, the valve opens and repays the hot gas of the refrigerant from the discharge into the liquid flow of the refrigerant entering the evaporator. This reduces the efficient bandwidth of the system.
# 11 evaporator (Evaporator)
The evaporator is a device in which the liquid refrigerant boils, absorbing heat during evaporation, in the coolant passing through it.
# 12 Freon Low Pressure Pressure (Low Pressure Refrigerant Gauge)
Provides visual indication of refrigerant evaporation pressure.
# 13 Refrigerant Low Refrigerant Pressure Limit)
Protects the system from low pressure in the refrigerant circuit so that water does not frozen in the evaporator.
# 14 Cooling fluid pump (COOLANT PUMP)
Water circulation pump for cooled contour
# 15 freezing temperature limit (FreeZestat Limit)
Prevents freezing fluid in the evaporator
# 16 temperature sensor
Sensor that shows the temperature of the water in the cooling circuit
# 17 refrigerant pressure gauge (Coolant Pressure Gauge)
Provides a visual indication of the pressure of the coolant supplied to the equipment.
# 18 Automatic Tightening (Water Make-Up Solenoid)
It turns on when water in the tank is reduced below the permissible limit. The solenoid valve opens and fills at the container from the water supply to the desired level. Next, the valve closes.
# 19 Tank Level Float Switch (Reservoir Level Float Switch)
Float switch. Opened when the water level in the container is reduced.
# 20 Temperature Sensor 2 (from Process Sensor Probe)
The temperature sensor that shows the temperature of the heated water that returns from the equipment.
# 21 Drive Relay (Evaporator Flow Switch)
Protects the evaporator from freezing in it water (when the water duct is too low). Protects the pump from dry stroke. Signals the absence of water flow in the chiller.
# 22 Capacity (Reservoir)
To avoid frequent compressor launches, the capacity of increased volume is used.
The chiller with water cooling of the capacitor is different from the air type type (instead of a tubular-ribbed heat exchanger with a fan, a shell-tube or plate, which is cooled by water) is used). Water cooling The capacitor is carried out with a wind cooler with a dry cooler (, drier) or cooling towers. In order to save water, it is preferable to be an option with a dry cooling towers with a water closed circuit. The main advantages of chiller with a water capacitor: compactness; The possibility of internal accommodation in a small room.
Questions and answers
Question:Is it possible to cool the liquid with a chiller on duct more than 5 degrees?
Chiller can be used in a closed system and maintain a predetermined water temperature, for example, 10 degrees, even if the refund is 40 degrees.
There are chillers that cooled water on the duct. This is mainly used to cool and gasing beverages, lemonade.
What is better chiller or drier?
Temperature when using the driver depends on temperature ambient. If, for example, the street will be +30, then the coolant will be with a temperature of + 35 ... + 40С. Drikeler is used mainly during the cold season to save electricity. Chiller can be obtained in a given temperature at any time of the year. You can make low-temperature chillers to obtain a fluid temperature with a negative temperature up to minus 70 s (the coolant at such a temperature is basically alcohol).
What chiller is better - with a water or air capacitor?
Water-cooled chiller has a compact dimensions, so they can be placed indoors and do not allocate heat. But cold water is required to cool the capacitor.
The chiller with a water capacitor has a lower cost, but can additionally need a dry cooling toward, if there is no water source - water pipe or well.
What is the difference between chillers with a thermal pump without it?
A chiller with a heat pump can work on heating, i.e. not only cool the cooler, but also heated it. It must be borne in mind that with a decrease in temperature, heating deteriorates. The most effective heating when the temperature is lowered not lower than minus 5.
What distance can I carry an air capacitor?
Usually, the capacitor can be removed at a distance of 15 meters. When installing the oil separation system, the capacitor high is possible up to 50 meters, provided that the diameter of copper highways is correctly selected between the chiller and the remote capacitor.
How minimum temperature is chiller?
When installing the winter start system, the work of chiller is possible to the ambient temperature minus 30 ... -40. And when installing the fans of the Arctic execution - up to minus 55.
Types and types of liquid cooling installation schemes (chillers)
It is used if the temperature difference ΔТ x \u003d (T NZ - T Czh) ≤ 7ºС (cooling of technical and mineral water)
2. Cooling diagram of fluid using an intermediate coolant and a secondary heat exchange apparatus.
It is used if the temperature difference ΔТ x \u003d (T NZ - T Czh)\u003e 7ºС or for cooling food products. Cooling in a secondary collapsible heat exchanger.
For this scheme, it is necessary to correctly determine the consumption of the intermediate coolant:
G x \u003d g f · n
G X - Mass flow of an intermediate coolant kg / h
G g - mass flow of cooled liquid kg / h
n - the multiplicity of intermediate coolant circulation
n. =
where: C RS - heat capacity of cooled fluid, KJ / (kg' k)
C PX - heat consumption of intermediate coolant, KJ / (kg' k)
ΔT x \u003d (T NH - T CH) - Temperature difference of the intermediate coolant in the evaporator
