Technical and environmental analysis of photovoltaic and solar water heater cogeneration system: a case study of Saveh City

Abstract

The overwhelming growth in energy consumption in Iran is to the extent that in the coming years, it will turn Iran from an energy-exporting country into an energy-importing country. The use of renewable energy is essential to address this threat. In this research, the energy and economic analysis of solar energy-based cogeneration system for a building in Saveh City has been studied. The main purpose of this study is to determine the optimal size of photovoltaic cell and solar water heater by considering environmental parameters and fuel saving. In this regard, the amount of solar radiation intensity and the required loads of the building under study were determined. Then, using the SAM and TSOL relationships and software, results such as the supply of electric and thermal loads of six panels of 327 W and 3.2 m2, respectively, are needed. This system will save more than 75% energy.

Modeling and Analysis of Energy/Exergy for Absorber Pipes of Linear Parabolic Concentrating Systems

“…By placing the values of y and x from equation (2) into equation (3), finally, the focal length of the parabola is obtained as follows [9][10][11][12][13][14][15][16][17][18][19][20]:…”

“…ΔP in is the difference between the fluid pressure at the inlet and the ambient pressure. The sum of the radiative and the fluid flow exergies gives the total input exergy [9][10][11][12][13][14][15][16][17][18][19][20]:…”

“…Due to the geometric structure of the collectors of this power plant, direct sunlight should be reflected in its linear center. With a concentration coefficient of solar radiation between 2 and 40, the temperature can reach 400 °C in the center of the collectors [11][12][13]. Each set of linear parabolic collectors may be 5 to 6 m wide, 1 to 2 m high, and more than 150 m long.…”

Thermal and Environmental Analysis Solar Water Heater System for Residential Buildings

“…So it seems necessary to study the production of solar energy as renewable energy. Solar energy is free of pollution and is widely available in all parts of the world, especially in warm regions and in areas far from the global electricity grid, used to generate electricity, heating, and economic cooling [9][10][11][12]. Our country (Iran) is geographically located in a hot and dry region and with more than 280 sunny days per year, and its annual solar radiation is estimated at 2200-1800 kWh/m 2 , which is higher than the global average.…”

Modeling / Optimization and Effect of Environmental Variables on Energy Production Based on PV / Wind Turbine Hybrid System

“…In addition, fossil fuels such as oil, gas, and coal will eventually come to an end, and civilization that is directly dependent on non renewable energy will end up with a new and larger challenge [5] [6][7]. This has led industrialized and developed countries to take more serious action in using other energy sources, particularly renewable energies [8] [9][10] [11]. The use of solar energy, wind and sea waves, geothermal, hydrogen, biomass, and so-called renewable energies requires a lot of research, and research must be done before use.…”