Theoretical and experimental investigation of a renewable energy source assisted heating and cooling system

Today's most important and controversial problems are usage of energy resources and their processes. Ensuring the sustainability of environmental resources, minimum amount of environmental sources will be used to produce energy. This will also help minimizing the environmental damage.Exergy environmental analysis, based on the exergy flows, is used to perceive the comperative enviromental impacts of the systems which consist of manufacturing process, operation process and waste process of the product. It is necessary to use the results of energy, exergy and exergo economic and environmental analysis together with deciding on the systems performance.In this study, 1 st and 2nd Laws of Thermodynamics are used with the SPECO and Eco-indicator 99 methods to perform energy, exergy, exergo economic and environmental analysis. Air-conditioning system of Yildiz Renewable House is taken as a case study. In this process, flow schemes and patterns of system components are formed for heating and cooling processes seperately. They are shown Figures 4.2 and 4.6, Tables from 4.1 to 4.8.As the result of the performed analysis for the heating process, energy efficiency of the compressor is 74.1% while exergy efficiency is 58.3% and it is found as the most inefficient component of system. It has also the highest exergy destruction of 0714 kW, cost rate associated with capital investment of 0.757 ? / h, cost rate associted with exergy stream of 1.316 ? / h, component related environmental impact of 0.044 mPts/s and environmental impact rate associated with exergy of 0108 MPts/s. For cooling process same variables are calculated as %60.6, %40, 0.640 kW, 0.684 ?/h, 1.217 ?/h, 0.040 mPts/s and 0.103 mPts/s, respectively. Therefore, improvements on the compressor are required.Generally, exergoeconomic and environmental factors of the system components are lower than typical values in the literature. The costs of exergy are needed to be reduced by lowering exergy destruction. Also this system is compared with 6 different systems in terms of fuel consumption, cost rate associated with fuel, cost rate associated with capital investment and fuel related environmental impact. Compared systems? components and results are given in the Tables 6.1 and 6.2. As a result, investigated system has the lowest cost rates associated with fuel and capital investment and also lowest fuel related environmental impact in which uses only electrcity as fuel.