High-efficiency compact high-temperature absorption type heat pump unit

Abstract

The invention discloses a high-efficiency compact high-temperature absorption type heat pump unit, and belongs to the technical field of heat pump devices, which consists of a generator, a condenser, a high-pressure absorber, a high-pressure flash tank, a low-pressure absorber, a low-pressure evaporator, a solution heat exchanger, a throttling device, a solution pump, a coolant pump and various types of connecting pipeline accessories. By adopting a method of two-stage evaporation and two-stage absorption and directly heating coolant water, which is evaporated from the high-pressure flash tank under high pressure, by using heat generated in the low-pressure absorber, the absorption type heat pump unit can recover low-temperature remaining heat to generate high-temperature hot water, and has higher energy source utilization ratio and a more compact structure. The low-pressure evaporator absorbs heat from a low-temperature heat source, the coolant water evaporated under high pressure is heated by using the heat generated in the low-pressure absorber, and finally the hot water is heated by using the heat generated in the high-pressure absorber and the condenser so as to generate the hot water at the temperature of 90 DEG C or above. The heat transfer temperature difference between low-pressure absorption and high-pressure evaporation is reduced, and the unit process is simplified.

Description

technical field [0001] The invention belongs to the technical field of heat pump devices, in particular to an efficient and compact high-temperature absorption heat pump unit. Background technique [0002] At present, various types of heat pump devices have been widely used in various heating, domestic and production hot water supply systems. Among them, the heat-increasing absorption heat pump uses high-temperature heat energy as the driving force to extract low-temperature waste heat for heating, hot water or process use. Heat has good energy saving, environmental protection and economic benefits, and has been widely used. For example, groundwater, surface water or industrial waste water are used as low-level heat sources, and high-temperature steam or fuel oil and gas are used as driving energy to heat buildings. absorption heat pump unit. In actual engineering, it is often encountered that the temperature of waste heat resources is low and the temperature required by us...

AI Technical Summary

Problems solved by technology

In actual engineering, it is often encountered that the temperature of waste heat resources is low and the temperature required by users is high. For example, the temperature of waste heat is 20-10°C, and the required heating temperature is 70-90°C. At this time, ordinary double-effect Or single-effect absorption heat pump units are often unable to raise the temperature of waste heat to the level required by users. Although the use of two-stage or multi-stage absorption heat pumps in series can achieve the purpose of increasing the temperature of waste heat by a large margin, it will bring to the system. Problems such as low energy utilization efficiency, bulky volume, large investment, and complex operation and regulation severely restrict the application of absorption heat pumps in this situation, and even lose their economic value.

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