The aim of the research is to assess the energy efficiency of proposed heat, electricity and hot water supply systems for apartment buildings. Schematic solutions of heat and power generating units based on liquid-vapor jet devices. The proposed schemes are improved solutions for mini-TPP and heat pump unit, and fundamentally new decisions have been developed, the so-called combined scheme of heat-&-electricity power generating aggregate, which has all the advantages of the previous two schemes. For the studied building, the parameters determining the heating system operation were previously determined, including hot water consumption based on the number of residents and electricity consumption defining the required turbine power. To determine feasibility of using heat-&-electricity power generating aggregate based on liquid-vapor jet devices, thermodynamic, exergetic and thermoeconomic analyses were performed. As a result of thermodynamic analysis, the load and power of devices included in proposed scheme solutions were determined, as well as the values of the main material flows participating in the energy conversion process in the proposed schemes. As a result of the exergetic analysis, the efficiency of the proposed schemes was determined. The most effective was the combined scheme, which is 23% better than the heat pump unit and 11% better than the mini-TPP. According to the results of the thermoeconomic analysis, the tariffs at which residents will receive heat, hot water and electricity were determined and compared with the current state ones. The combined scheme turned out to be the best. For it, the tariffs are on average 32-35% lower than the state ones for civil consumers.
Science Journal 