Combined cooling, heating and power supply system based on gradient utilization and deep recovery of waste heat

Abstract

The invention discloses a combined cooling, heating and power supply system based on gradient utilization and deep recovery of waste heat. The combined cooling, heating and power supply system comprises a gas engine, wherein a flue gas outlet of the gas engine is divided into a first flue gas pipeline and a second flue gas pipeline. The first flue gas pipeline is connected with a temperature difference power generation device. Flue gas in the first flue gas pipeline is used for driving the temperature difference power generation device to realize thermoelectric conversion. A flue gas outlet of the temperature difference power generation device is connected with a flue gas inlet of a flue gas condensation heat exchanger. The second flue gas pipeline is connected with a flue gas lithium bromide absorption heat pump. Flue gas in the second flue gas pipeline is used for driving the double-effect flue gas lithium bromide absorption heat pump to realize refrigeration or heating. The flue gas outlet connected with the double-effect flue gas lithium bromide absorption heat pump is connected with the flue gas inlet of the flue gas condensation heat exchanger. The flue gas condensation heat exchanger is connected with the external environment. By means of the combined cooling, heating and power supply system based on gradient utilization and deep recovery of the waste heat, the flue gas waste heat with a high temperature can be converted into electric energy, and therefore waste of the flue gas waste heat can be reduced when cold loads or hot loads are insufficient.

Description

technical field [0001] The invention relates to the field of distributed energy sources, in particular to a combined cooling, heating and power generation system based on waste heat cascade utilization and deep recovery. Background technique [0002] my country consumes a large amount of fossil energy every year, among which coal accounts for about 70% of the primary energy consumption, which has caused severe environmental problems and energy pressure. Therefore, it is necessary to develop clean and efficient energy technologies. As a relatively clean fossil fuel, natural gas has been widely popularized, especially the combined cooling, heating and power technology based on natural gas provides an important idea for the efficient use of fossil fuels. The thermal efficiency of conventional combined cooling, heating and power systems can reach 60-80%, which can save energy to a certain extent. However, in the current combined cooling, heating and power system model, the uti...

AI Technical Summary

Problems solved by technology

However, the existing technology mainly has two defects: one is that for the transitional season, due to insufficient cooling and heating loads, the waste heat is often not effectively utilized; the other is that the sensible heat and latent heat of low-temperature flue gas cannot be further recovered

Images