Novel low-temperature combined cooling, heating and power (CCHP) system based on heat pump

Abstract

The invention relates to a novel low-temperature combined cooling, heating and power (CCHP) system based on a heat pump. Currently, no novel low-temperature CCHP system based on the heat pump with a simple structure and a reasonable design exists. The novel low-temperature CCHP system based on the heat pump comprises a high-pressure steam pipe, a steam turbine, a power generator, a condenser and a boiler connecting pipe, and is characterized by also consisting of a heating low-pressure steam pipe, a heating condensate pipe, a power plant after-heat single-effect heat pump unit, a refrigeration single-effect absorbing heat pump unit, a heat pump unit loop pipe, a loop circulating pump, a user refrigeration pipe, a cooling tower, a cooling tower water inlet pipe, a cooling tower water outlet pipe, a cooling water circulating pump, a power plant circulating cooling water pipe, a heat pump cooling tower, a cooling tower circulating pipe, a heating single-effect absorbing heat pump unit, a heating heating pipe, a heat pump circulating pipe and a user heating pipe; the heating low-pressure steam pipe is connected with the refrigeration single-effect absorbing heat pump unit; and the heating condensate pipe is connected with the power plant after-heat single-effect heat pump unit. The novel low-temperature CCHP system based on the heat pump has the advantages of reasonable structural design, energy saving, environmental friendliness and high heat utilization rate.

Description

technical field [0001] The invention relates to a cogeneration system of heat, electricity and cooling, in particular to a novel low-temperature cogeneration system of heat, electricity and cooling based on a heat pump, which belongs to the technical field of heat pump energy saving in power plants. Background technique [0002] While the thermal power generating set provides electricity, a large amount of condensation heat is discharged into the atmosphere. At present, the average energy consumption of generating units in my country is 0.32-0.35kgce / kWh, of which about 45-55% of the condensation heat is discharged into the atmosphere, and 80.3% of my country's total power generation in 2010 is provided by thermal power plants, about 41413*0.335 / 1000*50%=694 million tce is discharged into the atmosphere, which accounts for about one-fifth of my country's total energy consumption. [0003] In order to improve the utilization rate of heating primary energy, people use heat pum...

AI Technical Summary

Problems solved by technology

However, the structure of the heat-increasing combined heat, power and cooling system is relatively complicated, and the utilization rate of heat energy is low.

Another example is the Chinese patent whose publication date is September 28, 2005, and the publication number is CN1673650, which discloses a combined heat, electricity, and cooling system based on a gas engine heat pump and a gas turbine engine. The system includes gas supply and exhaust gas. Smoke system, waste heat recovery and utilization system, vapor compression refrigeration system, the compressor of the vapor compression refrigeration system is directly driven by a gas engine, and the micro gas turbine generator generates electricity, so that the air conditioning system is completely driven by natural gas. More complex, energy efficiency is not high

[0010] To sum up, there is no new low-temperature cogeneration system based on heat pumps with simple structure, reasonable design, reliable performance, and high heat utilization rate, which reduces the utilization rate of condensation heat in power plants.

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