In the internet era of energy

district heating and cooling system will change from a single form of energy to the various forms of energy

especially renewable energy and untapped energy. Integration of different grades of heat sources will cause system energy change. The energy bus system is a multi-source and multi-user thermal energy system that can make integration of renewable energy sources or untapped energy sources in large scale for district heating and cooling. This paper focus on analysis of exergy change in multi-source water mixing and heat recovery process of energy bus system comparing with the conventional system. The energy bus system can be modeled as integration of a series of Lorenz cycles. Through the theoretical analysis of the ideal thermodynamic model of energy bus systems and conventional distributed systems

exergy change law and its influencing factors in multi-source water mixing and heat recovery process of energy bus system are analyzed. Results show that many factors affect exergy change of multi-source system. Different design parameters can cause the energy to increase or decrease

or unchanged. In this paper

heat recovery process of energy bus system is also analyzed theoretically

and the related parameters which affect the heat change of the bus side are obtained and the heat variation law is found

also the way to get the optimum bus water temperature T_EBS1.