HVAC is a term that is heard in all kinds of applications, from domestic to industrial. What it means and where it is used, however, are things that you might not completely know. In what follows, you get access to some information about this subject.
The importance of HVAC
Heating, ventilation, and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics and heat transfer. "Refrigeration" is sometimes added to the field's abbreviation, as HVAC&R or HVACR or "ventilation" is dropped, as in HACR (as in the designation of HACR-rated circuit breakers).
As was mentioned earlier, an HVAC system is intended for thermal control of areas as well as comfort for occupants. Temperature is factor that affects the performance and health status of many systems. Take the case of a server room temperature as an example for which high temperature adversely affects the system’s reliability and operation of the servers is a great source of heat generation; therefore, it is important to have an HVAC system that keeps the temperature at a desired point. see more
The components of HVAC
Do we need to know about HVAC system components? Well, HVAC systems are intended not only to adjust the thermal conditions of an area (mostly indoor), but they also bear the responsibility of delivering clean air to provide comfort in the environment when needed. Therefore, it would be quite beneficial actually to know some basics about their components, not only to appreciate the engineering art put into them, but also be able to identify easier what might your system need to work as you wish.
In modern buildings, the design, installation, and control systems of these functions are integrated into one or more HVAC systems. For very small buildings, contractors normally estimate the capacity and type of system needed and then design the system, selecting the appropriate refrigerant and various components needed. For larger buildings, building service designers, mechanical engineers, or building services engineers analyze, design, and specify the HVAC systems. Specialty mechanical contractors and suppliers then fabricate, install and commission the systems. Building permits and code-compliance inspections of the installations are normally required for all sizes of building. more information
What is an HVAC Economizer?
As can be deduced from the name, an HVAC economizer would be a device that enhances the economy of using the HVAC system. An economizer is placed withing the exterior parts of the HVAC system, most often on the rooftop of the facility or property.
Air-side economizers can reduce HVAC energy costs in cold and temperate climates while also potentially improving indoor air quality, but are most often not appropriate in hot and humid climates. With the appropriate controls, economizers can be used in climates which experience various weather systems. For information on how economizers and other controls can affect energy efficiency and indoor air quality in buildings, see the US Environmental Protection Agency report, "Energy Cost and IAQ Performance of Ventilation Systems and Controls Study.
references:
- ۹۹/۰۴/۱۸
