Thermal and Environmental Analysis Solar Water Heater System for Residential Buildings

Abstract

Due to the reduction of fossil resources, the replacement of renewable energy sources such as solar energy has become mandatory. Solar energy does not contain pollution and widely available in all parts of the world, especially in warm regions. Our country (IRAN) is geographically located in a hot and dry region, and with more than 280 sunny days per year, one of the nonpower applications of solar energy is heating space and water consumption of the building using solar thermal energy. Solar water heaters can be used to heat the water used in buildings, which is the main purpose of this study. Water heating consumes an average of 20% to 30% of the total energy consumption in the residential building. Therefore, using solar water heaters annually can provide 70% of the energy needed for water heating. The system designed in this research is able to provide 75% of the hot water consumption needs. If an auxiliary heat source is used next to this system, all hot water needs of the building can be met throughout the year. In this case, as much as 237.3 kWh, energy will be saved from fossil energy sources.

Using Rooftop Solar Heating to Supply Part of a High-Rise Residential Building Heat in the Cold Climate of Iran: One-Year Dynamic Analysis

“…Iran is located in the Middle East between 25 to 40 °northern latitude. Solar radiation in Iran is estimated to vary from 1800 to 2200 kWh/m 2 per year, which is greater than the global average [14]. e number of sunny days in Iran is 280 days, which is larger than most European countries [15].…”

Technical and Economic Evaluation and Optimization of an Off-Grid Wind/Hydropower Hybrid System

“…However, the use of this generator has problems such as pollution caused by diesel fuel consumption [5], which elicits lung and respiratory diseases. Diesel fuel is considered a finite and non-renewable source, and in recent years, attention has been focused on reducing the consumption of fossil fuels and replacing it with clean and renewable energy [6][7][8][9]. The use of renewable energy, in turn, has problems such as the high cost of its construction and the dependence of its energy production on climate change [10,11].…”

Thermodynamic analysis of absorption refrigeration cycles by parabolic trough collectors

“…Vapor condensation refrigeration systems do not cause noise pollution, they usually use environmentally compatible materials as refrigerants (such as water and methanol), they do not have any moving parts, and do not need any other source of energy except solar energy-ammonium, etc. 1,2 In addition to all the mentioned advantages, these systems have disadvantages in comparison with commercial types of cooling systems, such as high weight and volume, specific cooling capacity, and low performance coefficient. 3,4 In recent decades, many different types of physical surface absorption cooling systems with different geometries and working pairs have been designed, built, and analyzed.…”