CN211625788U - Double-loop natural cooling type air conditioning system - Google Patents
Double-loop natural cooling type air conditioning system Download PDFInfo
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- CN211625788U CN211625788U CN202020227301.9U CN202020227301U CN211625788U CN 211625788 U CN211625788 U CN 211625788U CN 202020227301 U CN202020227301 U CN 202020227301U CN 211625788 U CN211625788 U CN 211625788U
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Abstract
The utility model discloses a two return circuits natural cooling type air conditioning system, include: a refrigeration/free cooling circuit and a free cooling circuit, the refrigeration/free cooling circuit comprising: the system comprises a compressor, a first evaporative condenser, a first refrigerant pump and a first evaporator, wherein the inlet of the first evaporative condenser is communicated with the outlet of the compressor, and the inlet of the compressor is communicated with the outlet of the first evaporator; the outlet of the first evaporative condenser is communicated with the inlet of the first evaporator through the first refrigerant pump; the free cooling circuit includes: the inlet of the second evaporative condenser is communicated with the outlet of the second evaporator. The evaporator proportion and the compressor size can be configured according to the specific application environment, the system cost is reduced, meanwhile, a natural cold source is fully utilized, and the energy efficiency is improved.
Description
Technical Field
The utility model relates to an air conditioning system especially relates to two return circuits natural cooling type air conditioning system.
Background
Human beings have entered the big data era, and along with a series of information engineering proposals and advances such as "internet +", "big data application" in "thirteen five" plans, the scale and the quantity of data center obtain rapid development to become the power consumption consumer of information society. In order to ensure efficient and reliable operation of the data center, heat generated by the servers of the data center during operation needs to be rapidly exhausted. According to statistics, the electricity consumption of the modern social data center accounts for 5% of the total electricity of the whole society. IDC industry research reports have shown that by 2016, data centers scale to 714.5 billion dollars. In 2017, the electricity consumption of the Chinese data center exceeds 1250 hundred million kilowatts, and exceeds the electricity generation of three gorges hydropower stations and the power stations of the Gezhou dam for one year. According to statistics, the energy consumption of the air conditioners of the machine room and the base station accounts for 40% -50% of the total energy consumption. The enclosure structure of the data center is closed, the sensible heat load is large, the wet load is small, when the indoor temperature of the data center is higher than the outdoor temperature in spring and autumn transition seasons or even winter, the traditional air conditioning system still operates in a compression refrigeration mode to provide refrigeration capacity for the interior of a machine room, the energy consumption is large, and the problems of low-temperature starting of a compressor, poor lubrication effect, energy regulation and the like exist. In order to reduce the energy consumption of the data center and reasonably configure social resources, a refrigeration system of the data center needs to be optimized, wherein a natural cold source is a preferred mode for solving the problem of high energy consumption of a data center machine room at present, and the natural cold source is renewable energy. The utilization of outdoor natural cold sources has been the focus of researchers and engineers in the industry, and engineering research is being conducted in different forms, such as fresh air systems, gas-gas heat exchange systems, and gas-water heat exchange systems. In addition, composite air conditioners comprising various heat pipes, such as gravity-type separated heat pipes, liquid pump-powered separated heat pipes, and air pump-powered separated heat pipes, have been proposed and used. However, most of the above solutions are limited to be used in small data center rooms, and are not well used in large data centers.
In the prior art, the refrigerant pump and the magnetic suspension compressor are completed in the same loop, so that the cost is low, the energy-saving benefit is high, but the matching of the compressor is more likely in the system, and the energy efficiency has a continuous optimization space.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a two return circuits natural cooling type air conditioning system can dispose evaporimeter proportion and compressor size according to the concrete application environment, realizes system cost reduction, and make full use of nature cold source improves the efficiency simultaneously.
The technical scheme for realizing the purpose is as follows:
the utility model discloses a two return circuits natural cooling type air conditioning system, include: a refrigeration/free cooling circuit, and a free cooling circuit, wherein,
the refrigeration/free cooling circuit includes: a compressor, a first evaporative condenser, a first refrigerant pump and a first evaporator,
the inlet of the first evaporative condenser is communicated with the outlet of the compressor, and the inlet of the compressor is communicated with the outlet of the first evaporator;
the outlet of the first evaporative condenser is communicated with the inlet of the first evaporator through the first refrigerant pump;
a first one-way valve is arranged between the first evaporative condenser and the compressor;
a series branch formed by the compressor and the first check valve is connected with a second check valve in parallel;
the free cooling circuit includes: a second evaporative condenser, a second refrigerant pump, and a second evaporator,
the inlet of the second evaporative condenser is communicated with the outlet of the second evaporator;
the outlet of the second evaporative condenser is communicated with the inlet of the second evaporator through the second refrigerant pump.
Preferably, a first electronic expansion valve is arranged between the first refrigerant pump and the first evaporator;
and a second electronic expansion valve is arranged between the second refrigerant pump and the second evaporator.
Preferably, the first evaporative condenser, the first refrigerant pump and the first evaporator are all designed as a refrigeration/natural cooling unit;
the second evaporative condenser, the second refrigerant pump and the second evaporator are all designed as natural cooling units.
Preferably, the first evaporative condenser and the second evaporative condenser constitute a complete evaporative condenser, and the complete evaporative condenser is externally connected with a water pump.
Preferably, the number of the compressors is one or more, and the compressors are magnetic suspension compressors or air suspension compressors.
Preferably, a dry filter, a sight glass and a liquid storage device are arranged between the first evaporative condenser and the first electronic expansion valve and/or between the second evaporative condenser and the second electronic expansion valve.
The utility model has the advantages that: the utility model discloses constitute by two return circuits of refrigeration/natural cooling and natural cooling, one set of evaporative condenser of two return circuits sharing, two sections designs of evaporimeter, and the provision natural cooling's operating time (part natural cooling and full natural cooling) that can be by a wide margin to promote system performance by a wide margin, the utility model discloses can dispose evaporimeter proportion and compressor size according to the environment of concrete application, can effectually reduce the cooling pressure of compressor, can adopt littleer compressor to further reduction compression energy consumption. The cost of the system is reduced, meanwhile, a natural cold source is fully utilized, and the energy efficiency is improved.
Drawings
Fig. 1 is a structural diagram of a dual-circuit natural cooling type air conditioning system of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, the dual-circuit natural cooling type air conditioning system of the present invention includes: a refrigeration/free cooling circuit and a free cooling circuit.
The refrigeration/free cooling circuit includes: a compressor 1, a first evaporative condenser 2A, a first refrigerant pump 3A, and a first evaporator 5A.
The inlet of the first evaporative condenser 2A communicates with the outlet of the compressor 1, and the inlet of the compressor 1 communicates with the outlet of the first evaporator 5A. The outlet of the first evaporative condenser 2A communicates with the inlet of the first evaporator 5A via the first refrigerant pump 3A. A first check valve 6A is provided between the first evaporative condenser 2A and the compressor 1. The serial branch formed by the compressor 1 and the first check valve 6A is connected with the second check valve 6B in parallel. The inlet of the first refrigerant pump 3A communicates with the outlet of the first evaporative condenser 2A.
The free cooling circuit includes: a second evaporative condenser 2B, a second refrigerant pump 3B, and a second evaporator 5B. The inlet of the second evaporative condenser 2B communicates with the outlet of the second evaporator 5B. The outlet of the second evaporative condenser 2B communicates with the inlet of the second evaporator 5B via a second refrigerant pump 3B. The outlet of the second evaporative condenser 2B communicates with the inlet of the second refrigerant pump 3B.
A first electronic expansion valve 4A is provided between the first refrigerant pump 3A and the first evaporator 5A. A second electronic expansion valve 4B is provided between the second refrigerant pump 3B and the second evaporator 5B. The inlet of the first electronic expansion valve 4A communicates with the outlet of the first refrigerant pump 3A. An inlet of the second electronic expansion valve 4B communicates with an outlet of the second refrigerant pump 3B.
The first evaporative condenser 2A, the first refrigerant pump 3A, and the first evaporator 5A are all designed as a refrigeration/natural cooling unit; the second evaporative condenser 2B, the second refrigerant pump 3B, and the second evaporator 5B are each designed as a free cooling unit.
The first evaporative condenser 2A and the second evaporative condenser 2B constitute a complete evaporative condenser 2, and the complete evaporative condenser 5 is externally connected with a water pump 7. The first evaporator 5A and the second evaporator 5B constitute a complete evaporator 5. The first refrigerant pump 3A and the second refrigerant pump 3B constitute a complete refrigerant pump.
The number of the compressors 1 is one or more, and is a magnetic suspension compressor or an air suspension compressor.
The dry filter, the sight glass and the liquid storage device can be arranged between the first evaporative condenser 2A and the first electronic expansion valve 4A and/or between the second evaporative condenser 2B and the second electronic expansion valve 4B according to specific requirements.
The utility model discloses in, refrigeration/natural cooling return circuit both can the operation refrigeration mode (mechanical refrigeration: rely on mechanical action or heating power effect, make the refrigeration working medium change of state, accomplish refrigeration cycle, and utilize the temperature rise of working medium low temperature or the change of state of collection to refrigerate), can also operate natural cooling mode (natural cooling is through heat transfer forms such as heat exchange, convection current, heat radiation heat transfer from the object to the environment medium heat of discharge, reduces the temperature of object, finally reaches the process with the spontaneity that ambient temperature is the same). When the outdoor temperature is higher than a set value T, the natural cooling loop operates a natural cooling mode to obtain natural cooling capacity; the refrigeration/natural cooling operation loop carries out refrigeration mode according to the load to compensate the deficiency of the natural cooling loop, namely: the sum of the mechanical refrigeration cold quantity, the natural refrigeration cold quantity and the mechanical refrigeration cold quantity is set total cold quantity.
When the outdoor temperature is less than or equal to a set value T, the natural cooling loop operates a natural cooling mode to obtain first natural cooling capacity; the refrigeration/natural cooling operation loop also operates a natural cooling mode to obtain second natural cooling capacity, and the sum of the first natural cooling capacity and the second natural cooling capacity is set total cooling capacity. Therefore, the amount of cold energy provided by the first section of natural cooling under the worst working condition and the amount of mechanical refrigeration needed for supplement can be evaluated according to the climate conditions of different working places. After the comparison information is obtained, the size of the coil pipe can be designed according to the proportional cold quantity. Therefore, the cooling capacity of the compressor can be effectively reduced, and a smaller compressor can be adopted, so that the compression energy consumption is further reduced.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.
Claims (6)
1. A dual circuit natural cooling air conditioning system comprising: a refrigeration/free cooling circuit, and a free cooling circuit, wherein,
the refrigeration/free cooling circuit includes: a compressor, a first evaporative condenser, a first refrigerant pump and a first evaporator,
the inlet of the first evaporative condenser is communicated with the outlet of the compressor, and the inlet of the compressor is communicated with the outlet of the first evaporator;
the outlet of the first evaporative condenser is communicated with the inlet of the first evaporator through the first refrigerant pump;
a first one-way valve is arranged between the first evaporative condenser and the compressor;
a series branch formed by the compressor and the first check valve is connected with a second check valve in parallel;
the free cooling circuit includes: a second evaporative condenser, a second refrigerant pump, and a second evaporator,
the inlet of the second evaporative condenser is communicated with the outlet of the second evaporator;
the outlet of the second evaporative condenser is communicated with the inlet of the second evaporator through the second refrigerant pump.
2. The dual circuit natural cooling air conditioning system of claim 1, wherein a first electronic expansion valve is disposed between the first refrigerant pump and the first evaporator;
and a second electronic expansion valve is arranged between the second refrigerant pump and the second evaporator.
3. The dual circuit free-cooling air conditioning system of claim 1 wherein the first evaporative condenser, first refrigerant pump and first evaporator are each designed as a refrigeration/free-cooling unit;
the second evaporative condenser, the second refrigerant pump and the second evaporator are all designed as natural cooling units.
4. The dual circuit free-cooling air conditioning system of claim 1, wherein the first evaporative condenser and the second evaporative condenser comprise a complete evaporative condenser, the complete evaporative condenser being externally connected to a water pump.
5. The dual circuit natural cooling type air conditioning system as claimed in claim 1, wherein the number of the compressors is one or more and is a magnetic levitation compressor or an air levitation compressor.
6. The dual circuit natural cooling air conditioning system of claim 2, wherein a dry filter, a sight glass, and an accumulator are disposed between the first evaporative condenser and the first electronic expansion valve, and/or between the second evaporative condenser and the second electronic expansion valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020227301.9U CN211625788U (en) | 2020-02-28 | 2020-02-28 | Double-loop natural cooling type air conditioning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426105A (en) * | 2020-02-28 | 2020-07-17 | 克莱门特捷联制冷设备(上海)有限公司 | Double-loop natural cooling type air conditioning system and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426105A (en) * | 2020-02-28 | 2020-07-17 | 克莱门特捷联制冷设备(上海)有限公司 | Double-loop natural cooling type air conditioning system and control method thereof |
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