Multi-source high-temperature heat pump device and working method thereof

Abstract

The invention discloses a multi-source high-temperature heat pump device and a working method thereof. The device comprises four parts, specifically, a heat collecting system, a heat pump heating system, a hot water flash evaporation system and a steam compression system. According to the device, water serves as a heat pump circulating working medium, recovering and high-grade transformation of mid-grade and low-grade energy below 100 DEG C are realized through organic combination of heat energy recovering technology, low-pressure flash technology and intermediate-cooling two-stage compressiontechnology. Two internal circulation heat pump systems are introduced into the device, the low-grade energy gradient recovering in a wide temperature range is realized, and meanwhile, the steam yieldis improved; the intermediate-cooling two-stage compression taking water as the working medium meets heat requirements of 150-160 DEG C high temperature, and meanwhile, the energy efficiency coefficient of the device can reach 6-8. Compared with the prior art, the device is reasonable in design, outstanding in characteristics, can effectively recover the different kinds of mid-grade energy and the low-grade energy, and meanwhile, has the remarkable advantages that the energy efficiency coefficient, heat release amount are large and heat release temperature is high, and strategic requirementsof sustainable development of energy conservation and emission reduction are met.

Description

technical field [0001] The invention relates to a heat pump device, more specifically, a multi-source high-temperature heat pump device, belonging to the technical field of energy and heat pumps. Background technique [0002] The share of industrial heat is huge, and a large amount of waste heat resources are generated every day, but the current utilization rate of waste heat resources is less than 30%, which not only increases industrial energy consumption, but also causes environmental thermal pollution. In addition, my country also has huge reserves of medium and low temperature natural heat sources, most of which are concentrated below 100°C, which increases the difficulty of utilization to a certain extent. [0003] Before the problem of how to efficiently recycle low-grade heat energy, some scholars proposed to use heat pump devices to convert low-grade energy into high-grade energy to meet the demand for high-temperature heat. [0004] At present, the normal temperat...

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Problems solved by technology

[0002] The share of industrial heat consumption is huge, and a large amount of waste heat resources are generated every day, but the current utilization rate of waste heat resources is less than 30%, which not only increases industrial energy consumption, but also causes environmental heat pollution

The application number is: CN107461961A, an invention patent named "a two-stage flash evaporation and two-stage compression heat pump device and working method with dual heat sources". Great improvements have been made in improving the condensing temperature, energy efficiency ratio, and heating capacity of the heat pump system, but the recovery and utilization rate of the remaining heat resources is still not optimal, and the condensing temperature can still be further improved

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