An acronym HVAC stands for heating, ventilation and air conditioning Indoor and outdoor environmental comfort use HVAC technology. With roles including operation and maintenance, system design and construction, equipment manufacturing and sales, and in training and research. The HVAC industry is a global initiative. Thermal comfort and acceptable indoor air quality providence is our purpose.Thermodynamics, fluid mechanics and heat transfer are principles used by HVAC. HVAC systems can be used in both domestic and commercial environments. HVAC is a vital part of residential buildings such as single family homes, apartment buildings, hotels and senior living amenities, where safe and healthy building conditions are regulated concerning temperature and humidity, using fresh air from outdoors. In building an important element is to maintain adequate indoor quality air.
Switching or changing air in any space to provide high indoor air quality process is known as ventilating. Temperature control involves removal of moisture, oxygen renewal, and other gases. Ventilation includes both the exchange of air to the outside as well as movement of air within the building. ventilating a building may be divided into mechanical/forced and natural types. The forced ventilation is provided by air handler and is used to monitor the quality of air indoors. To monitor quality of air indoors the forced ventilation is provided by air handler. Building with outside air ventilation without us of fans or mechanical systems is referred to as natural ventilation.
Buildings are produced with heat by devices known as heaters.Heating is done at a central point. Such a system contains a boiler, furnace, or heat pump to heat water, smoke, or air in a central location. Transfer of heat is through conduction, convection and radiation.Heaters exist for various sorts of fuel, including solids, liquids, and gases fuels. For backup or supplemental heat for heat pump systems electrical heaters are often used.
The process of removing heat from a low-temperature reservoir and transferring it to a high-temperature reservoir is called refrigeration. Four crucial elements in cooling cycle are used. In a gaseous state does refrigerant cycle starts.The compressor pumps the refrigerant gas up to a high pressure and temperature. Losing energy (heat) to the outside, a heat exchanger, cools, and condenses into its liquid phase The refrigerant liquid flows at the proper rate, an expansion valve regulates it. Returning of the liquid refrigerant, to another heat exchanger where it is allowed to evaporate, hence the heat exchanger is often called an evaporating coil or evaporator. Absorption of energy (heat) from the inside air, returns to the compressor and repeats the cycle as refrigerant evaporates.
In the process, heat is absorbed from indoors and transferred outdoors, resulting in cooling of the building.