Ejection-absorbing hybrid refrigerating and heat pump unit and operating method thereof

Abstract

The invention belongs to the technical field of refrigerating and heat pumps and particularly relates to an ejection-absorbing hybrid refrigerating and heat pump unit and an operating method thereof. The unit comprises generators, a condenser, an evaporator, an absorber, a solution heat exchanger, a solution pump, a solution throttle valve, a coolant throttle valve, a steam generator and a gas ejector. By providing one or multiple steam generators, outlet temperature of a high-level drive heat source of the unit can be decreased, utilization efficiency of heat and hierarchy of coolant steam pressure are increased, and the gas ejector can be conveniently set according to different pressure level; high-temperature high-pressure steam generated by the steam generator allow coolant steam to be ejected from outlets of the generators to the condenser, thereby decreasing the high-level heat source temperature of the generators; the coolant steam from an outlet of the evaporator can also be ejected to the absorber so as to enhance absorbing pressure of the absorber and reduce the size of the absorber; the coolant steam from the outlet of the evaporator can also be ejected to the condenser to increase refrigerating and heating quantity of the unit and improve comprehensive thermal performance of the unit.

Description

technical field [0001] The invention belongs to the technical field of refrigeration and heat pump, and in particular relates to a jet-absorption compound refrigeration and heat pump unit and its working method. Background technique [0002] When traditional injection-absorption composite refrigeration and heat pump units use gas ejectors, the high-temperature and high-pressure refrigerant vapor at the outlet of the generator is used as the working fluid to inject the low-temperature and low-pressure refrigerant vapor at the outlet of the evaporator. Or increase the absorption effect of the absorber by increasing the refrigerant vapor pressure at the inlet of the absorber; or increase the cooling and heating capacity of the unit by additionally introducing a part of low-temperature and low-pressure refrigerant vapor to the condenser. [0003] When the high-temperature and high-pressure refrigerant vapor at the outlet of the generator is used as the working fluid to introduce...

AI Technical Summary

Problems solved by technology

When adding a part of low-temperature and low-pressure refrigerant vapor to the condenser to increase the cooling and heating capacity of the unit, due to the limitation of the condensation temperature, in order to meet the performance requirements of the ejector, the traditional jet-absorption compound refrigeration and heat pump unit cannot Do not increase the generation temperature of the generator, which greatly limits the application of injection-absorption compound refrigeration and heat pump units, and reduces the overall thermal performance of the unit

[0005] Due to the limitation of the condensing temperature and the characteristics of the binary solution, the generation temperature of the traditional absorption refrigeration and heat pump units is relatively high, and the outlet temperature of the high-level driving heat source of the absorption unit is still relatively high, resulting in the comprehensive thermal performance of the absorption unit. not tall

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