Earning estimation models for waste heat recovery of circulating water by absorption type heat pump under 4 typical engineering conditions were derived.Taking the waste heat utilization project of recycled water in a 300 MW unit as the example

benefit calculation was performed.Results show that

among the earnings obtained by different estimation models

the minimum value is 1.262×107 yuan while the maximum is 4.100×107 yuan

which has big difference.Therefore

the authors suggest that proper earning estimation model should be selected according to specific conditions when carrying out the calculation.The earning estimation method provides the basis for using absorption type heat pump technology to recover waste heat of circulating water for city heat supply engineering.