Regenerative dehumidification heat pump system based on dehumidification heat exchanger and its operation method

Abstract

The invention discloses a dehumidification heat exchanger based regeneration dehumidification heat pump system. The system comprises an evaporator, a condenser, a compressor, a throttle valve, dehumidification heat exchangers, a surface cooler, a first water pump and a second water pump, wherein each dehumidification heat exchanger comprises a dehumidification cooler and a dehumidification regenerator. The system further comprises five working mediums which run simultaneously, wherein the five working mediums include a refrigerant process, two water processes and two air processes; the two water processes include a dehumidification cold water process and a regeneration hot water process; and the two air processes include a treated air process and a regenerated air process. According to the system, the dehumidification processes and the regeneration processes of the two dehumidification heat exchangers are driven simultaneously through the evaporator and the condenser of the heat pump system respectively to generate dry fresh air, and independent humidity and heat load treatment and accurate temperature and humidity control are realized by adjusting and controlling the dehumidification heat exchangers and the surface cooler; and the system saves energy and is environment-friendly, small in volume and low in cost.

Description

technical field [0001] The invention relates to the technical field of refrigeration and air conditioning, in particular to a regenerative dehumidification heat pump system based on a dehumidification heat exchanger and an operating method thereof. Background technique [0002] At present, the traditional heat pump air-conditioning system is the mainstream of air-conditioning applications, but there are still many deficiencies in the traditional heat pump air-conditioning system. In summer cooling conditions, in order to meet the humidity requirements, the temperature and humidity of the air are reduced by condensation and dehumidification, and then heated to the required air supply temperature, resulting in waste of energy utilization and limiting the system COP. At the same time, the formation of condensed water makes it easy to breed bacteria in the air conditioner, which affects the indoor air quality. In winter heating conditions, indoor and outdoor air humidity is gen...

AI Technical Summary

Problems solved by technology

In summer cooling conditions, in order to meet the humidity requirements, the temperature and humidity of the air are reduced by condensation and dehumidification, and then heated to the required air supply temperature, resulting in a waste of energy utilization and limiting the system COP

At the same time, the formation of condensed water makes it easy to breed bacteria in the air conditioner, affecting indoor air quality

In winter heating conditions, indoor and outdoor air humidity is generally low. The traditional heat pump air-conditioning system can only increase the temperature of the air, but cannot provide humidification. It needs to be equipped with an additional electric humidifier, which further increases energy consumption. At the same time Affects indoor thermal comfort

[0003] After searching the public literature of the prior art, it is found that the current heat pump air-conditioning system is difficult to simultaneously meet the requirements of independent heat and humidity control and dual-use in winter and summer. For example, the Chinese patent number is 201410326312.1 "Heat pump-driven membrane type fresh air solution dehumidification air-conditioning system and method" , the system can only meet the working conditions in summer and cannot supply heat in winter. In addition, the solution dehumidification method is used to generate dry fresh air. The solution used in solution dehumidification will corrode metals, and the droplets produced at the same time will affect air quality.

However, the Chinese patent application number 201110327508.9 "a fresh air split-type air conditioning system with independent temperature and humidity control" satisfies cooling in summer and heating in winter, but it still processes sensible heat and latent heat of air at the same time, resulting in energy waste

Images