(1) using the gas driven heat pump

Heat pump is driven by gas, in order to make use of the waste water or exhaust gas residual heat. As shown in figure 6-6-8, its working process for; From gas source gas into the gas engine, l drive compressor 2, and 3 production discharge waste water into the evaporator, gives off heat in the evaporator, the heat pump working medium evaporation, the working medium of the steam in the compressor in 2, 5 compressed into the condenser, and the condenser after the throttle back again after 4 decompressional expansion evaporator. Heat is emitted in the condenser heat from the water in the heat supply network, the heated water into gas engine cooling jacket was the second time after heating, and then enter the waste heat boiler in the gas engine exhaust heat to heat water, for production or life. In this way, the heat absorption capacity of the whole system and the cost of fuel (gas) the ratio of the heat for l. 5, namely can save energy 30% above.

(2) the back pressure turbine with heat pump system

This system as shown in figure 6-6-9, with the back pressure turbine driven heat pump compressor, reduce the rise of temperature of the heat pump work, in order to improve the coefficient of heat pump work. Used to recycle heat after water is heated in the condenser is delivered, again by the back pressure turbine exhaust steam heating further. This will not only satisfy the required temperature, and made use of waste heat.