Saad A. Autonomous trigeneration systems with renewable energy sources for the conditions of the Middle East

The thesis is devoted to solving the actual problem of creating autonomous systems of trigeneration using the potential of renewable energy sources for the conditions of the Middle East at energy saving principles. The system of trigeneration through a conceptual model of technical system evaluation on a set of factors: energy, economic, ecological and social is proposed. The generalized scheme of the trigeneration system A generalized scheme of trigeneration system with solar photovoltaic converter and common compressor of heat and cold supply are developed. The rational terms of use of trigeneration system for climatic conditions of the Middle East are determined. The method of synthesis of circuit-cycle solutions of elements of highly effective system of trigeneration on the basis of thermodynamic analysis by the method of cycles is proposed. This method allowing to propose constructive solutions of elements of the trigeneration system for providing not only simultaneous cooling or heating of the air, but also the supply of fresh air to the premises. The mathematical model of trigeneration system with the photovoltaic converter and the dual purpose heat and cold supply machine for the year-round use with the flexible account of change the climatic conditions is proposed. Scientific and technical idea of "Solar house" as an integrated trigeneration system with a single type of primary energy – insolation, which can completely provide itself with energy, using an autonomous photoelectric converter and a highly efficient compressor for heat and cold supply is developed. The numerical simulation of the processes in the elements of trigeneration system, operating in different work modes with the account of climate conditions and thermal physic properties of work carriers of heat-cold machine are performed. By means of generalization and analysis of the results of the numerical simulation, the peculiarities of operating modes of the system of trigeneration with the account of changing environmental temperatures are estimated. Recommendations of choose the work carriers of the refrigeration machine at energy saving and environmental safety principles with the account the availability of equipment on the market of refrigeration equipment are worked out.