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Thermal environmental control system

A technology for controlling systems and thermal environments, applied in air conditioning systems, refrigerators, household heating, etc., can solve the problems of inability to realize continuous conversion and adjustment of natural cooling, no obvious reduction, high energy consumption of computer room air conditioners, and achieve obvious equipment loss , obvious effect, energy-saving effect and obvious effect of reducing

Inactive Publication Date: 2011-10-12
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using a compressor for refrigeration, the compressor needs to be turned on throughout the year. It is required that the compressor always bear all the sensible heat load no matter how the outdoor ambient temperature changes. Due to the fixed compression ratio, the power consumption of the compressor does not decrease significantly even when the outdoor ambient temperature is low. , leading to high energy consumption of computer room air conditioners throughout the year
Natural cooling includes natural ventilation, air-air heat exchanger, heat pipe heat removal, refrigerant heat exchange and other technologies, but all of them switch the cooling mode and turn off the compressor to achieve natural cooling under specific outdoor conditions. When the outdoor environment cannot When the requirements are met, the compressor is turned on again for mechanical refrigeration, which cannot realize the continuous conversion adjustment of mechanical refrigeration and natural cooling under different outdoor working conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 2 As shown, the difference between the thermal environment control system provided by this embodiment and the air-conditioning system of the prior art is: the inlet of the condenser 7 shell of the refrigerant circulation system is connected to the high-temperature chilled water pipe 13, and the outlet is connected to the cooling tower return pipe 6; The inlet of the shell of the evaporator 11 of the refrigerant circulation system is connected to the outlet pipe 5 of the cooling tower, and the outlet is connected to the low-temperature chilled water pipe 12, thereby forming an open cooling tower series cold water circulation unit.

[0021] During the operation of this embodiment, the compressor 8 of the refrigerant circulation system is usually not started, and the heat emitted by the indoor heat source 18 is sent to the water-heat pipe heat exchanger 14 through the air-heat pipe heat exchanger 16, and the air-heat pipe heat exchanger 14 passes through the...

Embodiment 2

[0023] Such as image 3 As shown, the difference between the thermal environment control system provided by this embodiment and Embodiment 1 is that an air precooling heat exchanger 20 is set at the outdoor air inlet 4 of the cooling tower, and the heat exchange of the air precooling heat exchanger 20 The pipe inlet is connected to the outlet pipe 5 of the cooling tower, and the outlet is connected to the spray pipe at the top of the cooling tower 1.

[0024] When this embodiment works, it is basically the same as Embodiment 1, except that the outdoor air 4 needs to be pre-cooled by the air precooling heat exchanger 20 before entering the cooling tower 1, so that the outlet water temperature of the cooling tower 1 is close to that of the air. dew point temperature. In this way, under the same outdoor working condition, this embodiment can further reduce the load borne by the compressor 8 and further reduce the cooling power consumption of the compressor 8 .

Embodiment 3

[0026] Such as Figure 4 As shown, the difference between the thermal environment control system provided by this embodiment and Embodiment 1 is that: the cooling tower 1 is provided with heat exchange coils 21 that are spirally coiled or rotated in rows, and the heat exchange coils 21 The inlet is connected to the return pipe 6 of the cooling tower, and the outlet is connected to the outlet pipe 5 of the cooling tower, thereby forming a closed cooling tower series cold water circulation unit. At the same time, a spray water supply pipe 22 and a water pump 23 are drawn from the bottom of the cooling tower 1 to supply water to the spray pipe at the top of the cooling tower 1 .

[0027] When this embodiment works, it is basically the same as Embodiment 1. The difference is that the circulating cold water enters the cooling tower 1 through the coil 21, and then exchanges heat with the air and spray water in the spray tower 1, which can effectively Unfavorable conditions such as ...

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Abstract

The invention relates to a thermal environmental control system which comprises a cooling tower, a cooling tower fan, a water pump, a cooling tower water outlet pipe, a cooling tower water return pipe, a refrigerant circulating system, a low-temperature freezing water pipe, a high-temperature freezing water pipe, two water-heat pipe exchangers and two paths of air-heat pipe exchangers, wherein the refrigerant circulating system consists of a condenser, a compressor, a throttling device and an evaporator; each path of air-heat pipe exchangers is connected with one water-heat pipe exchanger and provided with a plurality of air-heat pipe exchangers which are arranged in parallel, the two water-heat pipe exchangers are serially connected between the low-temperature freezing water pipe and the high-temperature freezing water pipe, and the lower part of the cooling tower is provided with an outdoor air inlet. The thermal environment control system is characterized in that a shell inlet of the evaporator is connected with the cooling tower water outlet pipe, a shell outlet of the evaporator is connected with the high-temperature freezing water pipe; and a shell inlet of the condenser is connected with the high-temperature freezing water pipe, and a shell outlet of the condenser is connected with the cooling tower water return pipe. According to the invention, power consumption of the compressor in the process of reducing environment sensible heat is effectively reduced.

Description

technical field [0001] The invention relates to a thermal environment control system, in particular to a thermal environment control system suitable for spaces with high sensible heat dissipation density. Background technique [0002] The space with high sensible heat dissipation density represented by the information room (the sensible heat ratio is greater than 0.9, and the heat generation density of equipment is 500-2000W / m 2 ) has higher requirements for indoor thermal environment control. Existing thermal environment control technologies include compressor refrigeration and natural refrigeration. When using a compressor for refrigeration, the compressor needs to be turned on throughout the year. It is required that the compressor always bear all the sensible heat load no matter how the outdoor ambient temperature changes. Due to the fixed compression ratio, the power consumption of the compressor does not decrease significantly even when the outdoor ambient temperature...

Claims

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Application Information

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IPC IPC(8): F24F3/00F24F3/06F24F13/30F25B31/00
Inventor 江亿刘晓华田浩张伦李震钟志鹏
Owner TSINGHUA UNIV
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