Certain industrial production also produces low pressure steam, and this heat is absorbed by water and then discharged by cooling towers, which ultimately release heat into the environment with a large heat loss.

Waste heat from power plants and industrial low pressure steam is mainly steam condensation heat with high energy density and high condensation temperature, which makes it a good waste heat resource. However, water-cooled power plants and indirect air-cooled power plant design is compact, the distance between the turbine and condenser is small, the low pressure steam is not easy to lead, most of the normal absorption heat pumps to recover circulating water heat; direct air-cooled power plants and production process low pressure steam, there is plenty of space to lead, the use of low pressure steam absorption heat pumps, do not reduce the grade of low pressure steam, efficient recovery of heat, significantly reduce investment and improve the economy.

Low pressure steam absorption heat pump and normal heat pump is the biggest difference in the evaporator structure. Normal evaporator heat exchange tube is arranged along the length of the heat pump, the length of the single tube is large, the flow area is small, the low pressure steam can not flow smoothly inside, the pressure loss is large, the waste heat grade is greatly reduced, and the waste heat recovery is difficult; Low pressure steam absorption heat pump adopts the patented technology of transverse steam inlet of the evaporator, and arranges the heat exchange tube along the width direction of the heat pump, the circulation area is enlarged, and the low pressure steam is flowed inside with a greatly reduced resistance, and the quality of the waste heat remains unchanged, realizing the high efficiency and lossless recovery of heat. When the low pressure steam flows inside, the resistance is greatly reduced and the quality of the waste heat is basically unchanged, realizing efficient and lossless recovery of the heat from the low pressure steam and excellent economy.