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Heat and power cogeneration centralized heat supply system based on heat pump

A technology of central heating and cogeneration, applied in heat pumps, machines using waste heat, lighting and heating equipment, etc., can solve problems such as insufficient utilization of latent heat of vaporization, and improve energy utilization efficiency and utilization efficiency. Effect

Active Publication Date: 2014-03-12
DALIAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Aiming at the problem that a large amount of latent heat of vaporization in the exhaust steam of the steam turbine cannot be fully utilized, the present invention provides a heat pump-based cogeneration central heating system

Method used

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  • Heat and power cogeneration centralized heat supply system based on heat pump

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Embodiment Construction

[0016] In a thermal power plant, a part of the high-temperature gas in the steam turbine 1 drives the generator 2 to generate electricity, and the other part of the high-temperature steam is respectively input to the steam double-effect absorption heat pump 6, the steam single-effect absorption heat pump 7, the steam large temperature difference absorption heat pump 8, and the steam-water heat exchange The device 9, as the power source of the absorption heat pump units at all levels, participates in heat exchange;

[0017] The exhaust gas in the steam turbine 1 enters the condenser 3, and part of the hot water with a heat exchange rate of 40°C is input into the heat exchanger 5 to exchange the heat of the 15°C primary network return water to 25°C, and the other part is connected in parallel Connected with steam double-effect absorption heat pump 6, steam single-effect absorption heat pump 7, and steam large temperature difference absorption heat pump 8, as the low-temperature h...

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Abstract

The invention discloses a heat and power cogeneration centralized heat supply system based on a heat pump. An absorption type heat exchanger unit and a multi-stage electrically-driven heat pump are introduced, and a heat source is used as a power source and is used for heat exchange repeatedly, so that the utilization efficiency of a steam heat source is improved, and heat can be better supplied to a user; a solar heat collector is introduced, and primary grid backwater is heated by using clean energy namely solar energy, so that the energy is saved, and the environment is protected; in addition, a heat exchanger is additionally arranged in a thermal power plant, the temperature of the primary grid backwater is raised by using a low-grade heat source in a condensing engine, and a double-effect steam absorption type heat pump, a single-effect steam absorption type heat pump, a large-temperature-difference steam absorption type heat pump and a steam water heat exchanger are simultaneously introduced to recover low-grade heat step by step, so that exhaust steam in a turbine is effectively utilized, and the energy utilization efficiency is improved. According to the system, the power generation efficiency of a power plant is improved by over 30 percent.

Description

technical field [0001] The invention belongs to the field of combined heat and power heat supply, in particular to a heat pump-based centralized heat supply system for combined heat and power. Background technique [0002] In recent years, with the increase of urban heating area in my country and the construction of industrial plants and production lines, the heat consumption in my country has grown rapidly. From the analysis of heating methods, there are mainly the following heating methods for residents in my country: combined heat and power generation, central heating in small and medium-sized regional boiler rooms, small household gas-fired water heaters, household coal-fired furnaces, etc. Among them, the cogeneration method is a comprehensive energy utilization technology that uses high-grade thermal energy of fuel to generate electricity and then supplies low-grade thermal energy for heating. At present, the average power generation efficiency of 3 million kilowatt t...

Claims

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Application Information

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IPC IPC(8): F25B27/02F25B30/04
CPCY02A30/274
Inventor 毕海洋
Owner DALIAN UNIV
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