Solar Hot Water Systems and Materials of Construction

Materials used in solar water heater systems must be carefully chosen to ensure that units are efficient but affordable. The efficiency with which solar heat is converted to the heat of water depends on the heat transfer efficiency of the structural materials and materials. The solar hot water system uses a conduction process to transfer the heat absorbed from the sun to the water and convects water through the structure by convection. In this task, we will explain materials used for construction of solar hot water heating system and its heat transfer performance.

Solar hot water system uses sunlight to heat water. At geographically low latitudes (less than 40 degrees), 60-70% of domestic hot water is used at temperatures of up to 60 ° C and can be supplied in solar heating systems. The most common types of solar water heaters are vacuum tube collectors (44%) and glass flat collectors (34%) commonly used for domestic hot water, and unglazed plastic collectors (21%) are mainly It is used to heat the pool. . As of 2007, the total installed capacity of the solar hot water heating system is about 154 GWh. As of 2006, 70 GW th was introduced, and by the year 2020 a long-term target of 210 GW th has been set, China is the world leader in its development. Israel and Cyprus are per capita leaders of solar hot water systems, with over 90% of households using them. In the United States, Canada and Australia, the heated pool is the main application of solar water heater, and the capacity capacity as of 2005 was 18 GW th.

People in the state of Oregon and Washington are increasingly installing photovoltaic and solar water heaters in homes and businesses. I created an online "How to Go Solar" guide to help navigate the process of installing these two types of solar energy. We also encourage you to take the basics of our free solar seminar in that area to learn more about setting up solar energy in your home.

Solar water heaters should also be mentioned here. The principle is the same - install maintenance free collectors on property and use solar energy. Solar energy is used to heat the water in the system. That water can be used for heating and hot tap water. A few years ago it was definitely a cheaper way to use solar energy. Now, as the cost of solar heat and heat pump goes down, the cost advantages are controversial. There is a problem of overheating in the summer, neither storage nor sale can be done, and enough heat can not be generated in the winter.