Heat exchange tower heat pump cooling and heating system and control method

Abstract

On the occasion with high cold and heat demands of a heat source tower heat pump system for a central air conditioning system, and the cold and heat of a traditional screw machine cannot meet the requirements; an efficient centrifugal refrigerating unit with high cold capacity is generally selected, but for a centrifugal machine unit, the centrifugal machine unit is limited by the pressure ratio, and cannot operate under the severe working conditions, such as the occasion where the temperature of the condenser side is high, and the temperature of the evaporator side is low; meanwhile, when an open heat source tower heat pump system operates in winter, and has the problem of solution concentration control. According to the heat exchange tower heat pump cooling and heating system and the control method, two or more centrifugal heat pump units serve as the basis, and an energy tower, a tower water pump, a user water pump, a solution concentration detection system, a solution box, a solution pump, a water collector, a water segregator and the like are arranged. According to the system, through mode switching, efficient refrigeration can be achieved in summer, and efficient heating can be achieved in winter; and the solution concentration can be dynamically adjusted according to the requirements in winter, and efficient operation of the whole system in winter and summer is achieved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration and air-conditioning system integration, and relates to a heat exchange tower heat pump cooling and heating system and a control method. Background technique [0002] With the rapid growth of China's economy, the importance of building energy conservation is gradually reflected. In the current urban building energy consumption, air-conditioning energy consumption accounts for the most important aspect, and some refrigeration and air-conditioning energy consumption accounts for 50% of the total building energy consumption. ~70%. [0003] In the current building refrigeration and air-conditioning system, the widely used cooling / warming methods are chiller + boiler (coal, gas or oil) and heat pump unit (air source heat pump, ground source heat pump and water source heat pump). Each thermal method has its advantages and disadvantages and scope of application. [0004] The air source heat pump ...

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