A low temperature geothermal water two grade utility with water source heat pump used in a retrofit project was introduced in this paper.

Methods of utilization for molasses have been introduced in this paper,including simple utilization,such as feedstuff additive and concrete additive,and ex- traction of available component,for example sucrose,betaine and caramel pigment etc.

Study on a refrigeration and heating hybrid system based on cascade utilization of solar energy;

This paper proposed a transshipment model for cascade utilization of the exhaust heat of gas turbine.

Based on the analysis of recycling modes for the waste and used family appliances,cost-benefit analysis model for different recycling modes is established considering the cascade utilization of the waste and used family appliances and assuming that the demand function for family appliances is nonlinear.

Studies the step utilization of energy in heating system.

According to the characteristics and quality of the sintering waste heat,this paper puts forward the optimized energy utilization schemes which include the integrated recovery of circular cooler waste heat and the mid-temperature sintering fumes,and also the three stages recovery and step utilization of the waste heat in the circular cooler.