two devices that intercept solar radiation for heating purposes
Two devices that intercept solar radiation for heating purposes are solar water heaters and solar air heaters.
1. Solar water heaters: These systems use solar thermal collectors to absorb and convert sunlight into heat energy. The collected heat is then transferred to water or a heat transfer fluid, which is used for hot water heating in residential or commercial buildings. There are two types of solar water heaters: passive and active. Passive systems circulate water through natural convection, while active systems use pumps to circulate the fluid.
2. Solar air heaters: These devices are designed to directly heat the air using solar energy. They typically consist of an absorber plate or collector that absorbs solar radiation, a glass cover to trap the heat, and an air duct system to distribute the heated air. Solar air heaters are commonly used for space heating in residential, commercial, or industrial applications. They can be mounted on a roof or wall, and are especially effective in cold climates.
There are several devices that can intercept solar radiation for heating purposes. Two common examples are:
1. Solar Water Heater: A solar water heater consists of solar collectors, which are typically flat panels or evacuated tubes mounted on the roof or other suitable area to receive sunlight. These collectors absorb solar energy and transfer it to a fluid, usually water or a mixture of water and antifreeze. The heated fluid is then circulated from the collector to a storage tank, where it can be used for hot water supply or space heating.
2. Solar Air Heater: A solar air heater is designed to absorb solar energy and heat air directly. It typically consists of a dark-colored, thermally conductive absorber plate covered with a transparent glazing or a series of transparent tubes. When sunlight passes through the glazing or tubes and reaches the absorber plate, it heats up the air flowing through the channels behind it. The heated air can then be used for space heating or ventilation purposes.
These devices capture solar radiation and convert it into usable heat energy, providing an environmentally friendly and cost-effective alternative to traditional heating systems.