The second kind absorption heat pump with two terminal or multiple terminal supplying heat

Abstract

The invention provides a second-class absorption heat pump for heating from two ends and multiple ends, belonging to the residual heat utilization heat pump technology field. Aiming at two-step and multiple-step second-class absorption heat pump with heating from one end, the invention mainly adds absorber or / and changes absorber-evaporator device to composite absorbing-vaporizing device so as to realize heating from two ends or multiple ends to outside by added absorber or / and composite absorbing-vaporizing device with original heat pump absorber. In the basic method of adding absorber mainly, concentrated solution from absorber or from generator after it is decompressed by pressure reducing valve enters into new absorber to absorb cryogen steam from evaporator or absorbing-vaporizing device and providing heat to outside. In the basic method of changing absorber-evaporator to composite absorbing-vaporizing device, entered concentrated solution absorbs cryogen steam from evaporator or next-step absorbing-vaporizing device and provides heating to outside. Heat pump provided in the invention can take the place of linkage system constituted by different-step same heat pumps.

Description

Technical field: [0001] The invention belongs to the technical field of low-temperature waste heat utilization heat pumps. Background technique: [0002] Using absorption heat pump technology for waste heat utilization is an effective means, which has relatively good energy saving, environmental protection and economic benefits. In practical application, firstly, the heat pump is required to raise the heat from the waste heat temperature to a level above the level required by the user; secondly, the heat pump is required to have a simple process and structure as much as possible; thirdly, it is required to have high waste heat utilization efficiency. In a nutshell, heat pumps, an energy-saving device, should have comprehensive advantages such as low cost, simple and reliable operation, high performance index and good economic benefits, so as to expand the application range of heat pumps. [0003] When the waste heat temperature is high and the waste heat is relatively abund...

AI Technical Summary

Problems solved by technology

Traditional absorption heat pumps of the second type at all levels only supply heat from one absorber (heat supply end), and the number of stages depends on the highest required temperature of the heated fluid; When heating from a low temperature to a higher temperature, limited by the temperature and quantity of waste heat resources and the conditions of the cooling medium, the use of a single-stage heat pump often cannot obtain satisfactory results

This is because: in order to achieve high-temperature heating, the number of heat pump stages must be high, but at this time the utilization rate of residual heat is relatively low, and the waste heat cannot be effectively used, and even the energy saving effect is greatly reduced; if a heat pump with a low number of stages is used, such as a single-stage first The second type of absorption heat pump, the performance index of the heat pump is relatively high, but its heating temperature is low, which cannot meet all the heat needs of users, and also cannot achieve satisfactory energy-saving benefits.

The joint heating system composed of different stages of heat pumps can meet the heat demand of users in a wide temperature range, and can realize the application of waste heat to a higher degree at the same time, but this will inevitably increase the cost of the entire energy-saving heating system and the operation of the system. The complexity of the process, the economic benefits are greatly reduced, and even the economic requirements cannot be met.

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