Heat recovery fresh air system and working method
A fresh air system and heat recovery technology, applied in heat recovery systems, ventilation systems, energy recovery systems for ventilation and heating, etc., can solve the problems of low heat exchange efficiency, complex structure, high cost, etc., and achieve high heat exchange efficiency, The effect of low cost and low consumables
Pending Publication Date: 2019-03-26
TSINGHUA UNIV
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Problems solved by technology
[0008] The purpose of the present invention is to provide a heat recovery fresh air system and working method to solve the problems of many consumables, complex structure, low heat exchange efficiency and high cost in the prior art
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Embodiment 1
[0054] This embodiment takes three rooms as an example, in which three air-liquid counterflow microchannel heat exchangers for fresh air are connected in series, and three air-liquid counterflow microchannel heat exchangers for exhaust air are connected in parallel to realize decentralized exhaust air and centralized fresh air Heat recovery and preheating treatment. The exhaust inlet includes a first exhaust inlet 10 , a second exhaust inlet 11 and a third exhaust inlet 12 , and the exhaust outlet includes a first exhaust outlet 13 , a second exhaust outlet 14 and a third exhaust outlet 15 .
[0055]Taking winter conditions as an example, this embodiment performs heat recovery for three rooms. At this time, the indoor exhaust air temperature is higher than the outdoor fresh air temperature, so the heat from the indoor exhaust air should be recovered to preheat the fresh air. The low-temperature refrigerant enters the first exhaust gas-liquid counterflow microchannel heat exch...
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The invention relates to the field of fresh air systems, and provides a heat recovery fresh air system. The heat recovery fresh air system comprises a fresh air system body, fresh air gas-liquid counter flow microchannel heat exchangers and exhaust air gas-liquid counter flow microchannel heat exchangers. The fresh air system body comprises fresh air inlets, fresh air outlets, exhaust air inlets,exhaust air outlets and a refrigerant channel. Refrigerants in the fresh air gas-liquid counter flow microchannel heat exchangers and the exhaust air gas-liquid counter flow microchannel heat exchangers and gas are subjected to counter flow heat exchange. The fresh air inlets, first gas channels and the fresh air outlets are communicated in sequence, the exhaust air inlets, second gas channels andthe exhaust air outlets are communicated in sequence, and first liquid channels, the refrigerant channel and second liquid channels are connected to form a closed circulating channel. The invention discloses a working method of the heat recovery fresh air system. The manner that gas-liquid counter flow heat exchange is carried out on fresh air and the refrigerants and on exhaust air and the refrigerants is adopted, cross contamination is avoided, and the heat exchange efficiency is improved; meanwhile, the use level of the refrigerants is reduced, and consumption of a circulating pump is reduced; and consumables are low, the structure is simple, and cost is low.
Description
technical field [0001] The invention relates to the technical field of fresh air systems, in particular to a heat recovery fresh air system and a working method. Background technique [0002] At present, building energy consumption occupies a high proportion in the total energy consumption of society, and HVAC energy consumption is the main part of building energy consumption. It is necessary to reduce building energy consumption and achieve energy saving and emission reduction by optimizing the system and terminal form. [0003] As an energy-saving technology, heat recovery in the fresh air system has been widely used in engineering. At present, the widely used heat recovery devices of the fresh air system include rotary wheel heat recovery, heat pipe heat exchanger heat recovery, plate-fin heat recovery, intermediate refrigerant heat exchanger heat recovery, etc. Heat exchangers are widely used in HVAC systems, including refrigeration units, outdoor heat collection devic...
Claims
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IPC IPC(8): F24F12/00F24F13/30F28D7/10F28D9/04F28F1/02F28F3/06F28F9/00
CPCF24F12/002F24F13/30F28D7/10F28D9/04F28F1/02F28F3/06F28F9/00F28F2260/02Y02B30/56
Inventor 石文星杨子旭李先庭陈炜王宝龙肖寒松
Owner TSINGHUA UNIV