Fresh air precooling auxiliary system for relieving hot-stack effect of soil source heat pump

Abstract

The invention discloses a fresh air precooling auxiliary system for relieving the hot-stack effect of a soil source heat pump. The fresh air precooling auxiliary system comprises a returned air cold energy recycling system, a condensed water recycling system and multiple levels of fresh air precooling systems. Fresh air is pretreated through the returned air cold energy recycling system. Heat exchange is conducted between the fresh air obtained after pretreatment and soil in an underground first floor in a building space, so that first-level fresh air precooling is achieved. When an air conditioning unit operates, condensed water drained out of the air conditioning unit is recycled into a water collection tank through the condensed water recycling system. After first-level fresh air precooling treatment is completed, when the temperature of fresh air does not reach the air supply temperature, an adjustment valve is switched on; the fresh air enters the second-level fresh air precoolingsystem; the condensed water is repoured into a condensed water pipe in a casing pipe; and heat exchange is conducted between the fresh air and condensed water and soil in an underground second floor.The fresh air obtained after multi-level precooling reaches the air supply temperature and is supplied to the air conditioning unit through a draught fan, and the whole system is in cycle use. According to the whole system, the cold energy gradient is utilized, and level-by-level adjustment is conducted; heat stack of the soil source heat pump is relieved; and the purposes of energy conservationand environmental protection can be achieved.

Description

technical field [0001] The invention relates to a fresh air precooling auxiliary system for alleviating the "heat accumulation" effect of a soil source heat pump, in particular to a fresh air precooling auxiliary system utilizing the space structure of underground garages and corridors, and belongs to the technical field of HVAC. Background technique [0002] In recent years, modern buildings have emphasized the use of green energy and renewable energy. Ground source heat pump technology has been used in many new or existing building renovation projects. However, many problems have arisen in the application of ground source heat pumps, such as: In hot-summer and cold-winter regions, due to the unbalanced cooling and heating loads, the heat accumulated in the soil cannot be dissipated in time, resulting in the phenomenon of "heat accumulation", which reduces the efficiency and service life of the heat pump system, and reduces the energy-saving effect. After several years of l...

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Problems solved by technology

However, these methods have certain limitations. The system cannot operate intermittently when the load is large in summer. The proportion of domestic hot water used in buildings in our country is relatively small, and most of the existing buildings do not reserve the location of cooling towers.

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