Solar-gas engine heat pump heating device and its operation method

Abstract

The invention is a solar-gas engine heat pump heating device, namely a heating device integrating the solar energy utilization technique with the gas engine heat pump technique, composed of solar heat collecting system, gas engine heat pump system and water circuit circulating system and comprising engine, compressor, heat preservation water tank, expansion valve, tee valve, intermediate heat exchanger, heat collector, air source evaporator, fume heat exchanger and flow regulating valve. And it has three different working modes: when external solar radiation intensity is enough high, the gas engine heat pump does not work and it can meet the requirements by directly utilizing solar energy; when the solar radiation intensity is so low that the water temperature in the water tank is very low, the heat pump is switched on and works with the air as heat source; and when the solar radiation intensity is intermediate, the gas engine heat pump works with the solar heated working medium as heat source. And it can in all weathers and continuously supply 80-90 deg.C hot water.

Description

technical field [0001] The invention relates to a novel solar-gas engine heat pump heating device, belonging to the manufacture of heat pump water heaters [0002] technology field. Background technique [0003] For a long time, in my country's primary energy consumption structure, coal has always been dominant. Extensive use of coal has brought serious environmental pollution and brought great pressure to my country's economic development and environmental protection. Natural gas is a kind of green energy. It is clean and can reach a state of complete combustion. Increasing the proportion of natural gas in my country's energy use will help adjust the energy structure. Compared with electric air conditioners, gas air conditioners have obvious comparative advantages in saving energy, reducing air pollution, improving urban environmental quality, adjusting power peak-valley balance rate, and increasing power load rate. Therefore, the popularization and application of gas-fir...

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Problems solved by technology

[0004] Due to the limitations of solar energy's own dispersion and intermittent characteristics, the current solar water heating devices still have some shortcomings: the efficiency of the heat collection system is generally low, the heat collection area is too large, and the heat collection temperature generally does not exceed 100°C, and the installation is difficult. All-weather continuous hot water supply, hot water supply time is limited, hot water temperature is difficult to maintain stable, generally need to configure auxiliary heating device; at the same time, in the application process of gas heat pump, the heat dissipation of the engine cylinder liner and the utilization of exhaust heat Insufficient, the system waste heat utilization rate is expected to be further improved

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