PERFORMANCE STUDY OF CARBON-DIOXIDE AS AN ALTERNATIVE WORKING FLUID IN EVACUATED TUBE COLLECTOR UNDER DIFFERENT THERMODYNAMIC CYCLES

Abstract

Abstract Evacuated tube solar collectors as an energy delivering device for low grade heat employment have been investigated for years. In current ages, some researchers have given additional concentration to engaging non-conventional fluids such as Nano-fluids, various refrigerants as an absorbing medium to employ solar energy for its enormous and sustainable reserve. Typically Evacuated tube solar collectors have been comprehensively exercised in low temperature energy technology. A number of projects of solar collectors have been established over the years with the intention of improving and investigating their performances. Thermal Energy performance of a solar collector is studied with naturally available Carbon-dioxide gas as an alternative working fluid. The main aim of this study is to develop a thermodynamic cycle which could increase the usability of the proposed fluid within the parameters already achieved for the collector. A Possible thermodynamic cycle is deduced and proposed with primary heat addition at constant volume, turbine work output, multistage compression and intercooling as heat recovery. This system is expected to handle much more amount of energy, uniform heat recovery over a wide range of solar irradiation, requires much less compression work and better net-work output as compared to Conventional cycles with primary heat addition at constant pressure employing Evacuated tube Collector with Combined Heat and Power Cycle.