Two-stage lithium bromide absorption heat pump unit with refrigerant water preheater

Abstract

The invention relates to a two-level second-kind lithium bromide absorption heat pump unit provided with a refrigerant water preheater. The two-level second-kind lithium bromide absorption heat pump unit comprises a generator (1), a condenser (2), an evaporator (6), absorbers and solution heat exchangers, and the unit is additionally provided with a flash evaporator (14) and the refrigerant water preheater (16); meanwhile, the absorbers comprise the first-level absorber (11) and the second-level absorber (13), the solution heat exchangers comprise the high-temperature solution heat exchanger (12) and the low-temperature solution heat exchanger (10), the second-level absorber (13) and the flash evaporator (14) are located in the same cavity, the first-level absorber (11) and the evaporator (6) are located in the same cavity, the generator (1) and the condenser (2) are located in the same cavity, a waste heat source enters the evaporator (6), the generator (1) and the refrigerant water preheater (16), and a solution circulates in a series connection mode. By means of the two-level second-kind lithium bromide absorption heat pump unit provided with the refrigerant water preheater, under the conditions that the medium (low) temperature waste heat source is used for driving and cooling water can be used, the temperature rising amplitude of the heat source is improved.

Description

technical field [0001] The invention relates to a second-type lithium bromide absorption heat pump unit. It belongs to the technical field of air conditioning equipment. Background technique [0002] There are a large amount of medium-temperature waste heat resources in the production process, and direct discharge not only wastes a large amount of heat sources, but also produces thermal pollution. Cooling with cooling water requires a large amount of cooling water. It requires a large amount of high-temperature heat source and consumes a large amount of high-quality energy to supply it. In such an occasion, the second type of lithium bromide absorption heat pump unit is used, and the waste heat and waste heat can be effectively recovered under the condition of using cooling water to produce a higher temperature heat source. However, the second type of lithium bromide absorption heat pump units in the past are all single-effect processes, such as figure 1 As shown, it main...

AI Technical Summary

Problems solved by technology

Compared with the waste heat heat source temperature, the temperature of the heat source produced by the second type of absorption heat pump unit in the single-effect process has a temperature rise range of only about 30°C, and is also limited by the temperature of the cooling water. The grade of hot water is limited, and the production process with high grade of heat demand cannot be satisfied

Especially for the low temperature of the waste heat source, the second type of absorption heat pump unit using the traditional single-effect process cannot produce high-quality heat source for production process or domestic use due to the limited temperature rise range, so that the medium (low) temperature Waste heat cannot be recycled and goes to waste, resulting in increased energy consumption

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