Abstract
In recent years, Kazakhstan has growing interest in sustainable and energy effective combined supplying for decentralized energy consumers. This is due to the development of the regions and the desire of consumers to obtain modern energy services. This paper presents a comparative analysis of the energy efficiency of an combined energy autonomous systems constructed on the basis of cogeneration (CHP) and trigeneration (TG) (involving low-potential heat of the earth (LPH)) low and domestic size power plants. Method of research is mathematical modeling and simulation of combined heating, cooling and power supplying in the system that combines thermodynamic cycle internal combustion engine (ICE) and geothermal heat pump. Parametric adjustment and calibration of mathematical models implemented on the basis of experimental research prototype trigeneration plant. Established, that the application of cogeneration plants for autonomous objects in extreme continental climate in Kazakhstan with a large seasonal variation in outdoor temperatures significantly inferior to the energy efficiency of trigeneration plants. So, if the average annual energy efficiency of cogeneration systems based on internal combustion engine does not exceed 50-60%, and usage the TGP allows 3-4 times to reduce the consumption of fossil fuel by involving all-season source of renewable energy low-potential heat of the earth.