A r134a-dmf rectification tower absorption refrigeration system and method

Abstract

The disclosure provides a R134a-DMF rectification tower absorption refrigeration system and method, the system includes a rectification tower, a solution heat exchanger, an absorber, a condenser and an evaporator; the outlet of the absorber is communicated with a circulation pump, The circulation pump is connected with the inlet of the cold end of the solution heat exchanger, and the outlet of the cold end of the solution heat exchanger is connected with the inlet of the rectification tower; the first outlet of the rectification tower is connected with the condenser, and the condenser is connected with the first throttle valve, and the second A throttling valve is communicated with the evaporator, and the evaporator is communicated with the absorber; the second outlet of the rectification tower is communicated with the inlet of the hot end of the solution heat exchanger, and the outlet of the hot end of the solution heat exchanger is communicated with the second throttle valve. Two throttling valves are communicated with the absorber; this disclosure provides a rectification tower module parameter optimization design method suitable for this system, and determines the rectification tower parameters suitable for R134a purification, which greatly improves the R134a-DMF absorption type COP of the refrigeration system.

Description

technical field [0001] The present disclosure relates to the technical field of refrigeration, in particular to a R134a-DMF rectifying tower absorption refrigeration system and method. Background technique [0002] The statements in this section merely provide background related to the present disclosure and do not necessarily constitute prior art. [0003] Absorption refrigeration is driven by low-grade thermal energy such as solar energy and industrial waste heat, and uses less electrical energy to achieve refrigeration. Due to the needs of energy saving and environmental protection, absorption refrigeration systems have regained people's attention. At present, the common binary solutions of absorption refrigeration are ammonia-water and lithium bromide-water, while the ammonia-water absorption refrigeration system has ammonia leakage and produces toxic gas, and the lithium bromide-water absorption refrigeration system has system corrosion and system crystallization probl...

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Problems solved by technology

After research, it is found that the main reason for the low COP of the R134a-DMF absorption refrigeration system is: at present, the generator of the R134a-DMF absorption refrigeration system adopts the form of a sleeve heat exchanger + a vapor-liquid separation tank, which will As a result, the R134a refrigerant produced by the generator contains part of the DMF solvent, which in turn affects the system COP

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