Open-type bidirectional thermodynamic cycle and second-class thermally-driven compression heat pump

Abstract

The invention provides an open-type bidirectional thermodynamic cycle and a second-class thermally-driven compression heat pump belonging to the technical fields of heat energy utilization and heat pumps. The open-type bidirectional thermodynamic cycle is formed by a process 12 of cold source medium pressure rise beginning from a low temperature, a process 23 of absorbing heat from a medium-temperature heat source, a process 34 of pressure rise beginning from a medium temperature, a process 45 of releasing heat towards a high-temperature heat source and a process 56 of pressure reduction beginning from a high temperature. The outside communicates with a compressor by virtue of a cold source medium channel; the compressor communicates with a second compressor through a heat exchanger by virtue of a cold source medium channel; the second compressor communicates with an expansion machine through a heat supply device by virtue of a cold source medium channel; the expansion machine communicates with the outside by virtue of a cold source medium channel; the heat exchanger communicates with the outside by virtue of a medium-temperature heat medium channel; the heat supply device communicates with the outside by virtue of a heated medium channelA cold source medium channel which communicates with a compressor is arranged at the outside; the compressor is provided with a cold source medium channel which communicates with a second compressor through a heat exchanger; the second compressor is provided with a cold source medium channel which communicates with an expansion machine through a heat supply device; the expansion machine is provided with a cold source medium channel which communicates with the outside; the heat exchanger is internally provided with a medium-temperature heat medium channel which communicates with the outside; the heat supply device is provided with a heated medium channel which communicates with the outside; and the expansion machine is connected with the compressor and the second compressor and is used for transmitting power, so that the second-class thermally-driven compression heat pump is formed.

Description

Technical field: [0001] The invention belongs to the technical field of power, heating and heat pump. Background technique: [0002] Heat demand and power demand are common in human life and production. The higher the temperature of thermal energy, the higher the possibility of its utilization, and the more convenient the utilization. In reality, for lower temperature heat loads, one needs to use the necessary techniques to increase their temperature. In the process of realizing the above purpose, there will be many considerations or constraints, including the type, grade and quantity of energy, the type, grade and quantity of user requirements, ambient temperature, type of working medium, equipment flow, structure and manufacturing costs, etc. [0003] The heat energy (temperature difference) utilization technology represented by absorption heat pump technology uses the temperature difference between the heat load and the cold environment to increase the temperature of p...

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Problems solved by technology

[0003] The heat energy (temperature difference) utilization technology represented by absorption heat pump technology uses the temperature difference between the heat load and the cold environment to increase the temperature of part of the heat load; however, due to the nature of the working medium (solution and refrigerant medium), It is also impossible to realize the conversion of thermal energy to mechanical energy while supplying heat, and its application field and application range are greatly limited.

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