Major Considerations in HVAC Design
Major parameters for HVAC design by looking at different processes and their environmental impact include the following:
Temperature is sensible heat that can be felt or sensed because it causes a rise or fall in temperature.
It is an indication of the level of water vapor in the air. Humidity is typically expressed as relative humidity. HVAC and facility professionals utilize dew point to indicate moisture content. A psychrometric chart is a necessary tool for understanding the current state of the air and water vapor mixture.
Particle load may occur from the outside or from within the facility. The wind and the season can play big parts in contributing to the amount of particulate in the air being introduced into an HVAC system. Internal particulate loading can come from people, corrugate, facility materials of construction, and manufacturing or testing contaminants. Particulate can be viable or non-viable and have their potential hazards to the facility environment.
Vapor contamination can come from internal and external sources similar to particulate contamination. An HVAC system near a highway can draw in detectable levels of hydrocarbons. A diesel engine inadvertently can bring odors and vapors into warehouses, offices, laboratories, and manufacturing areas served by the unit, causing discomfort or illness to the building occupants. Improper amounts of outside ventilation air can cause carbon dioxide build-up with resulting oxygen deprivation concerns.
Air pressure is assumed to be incompressible in most HVAC applications. Sites located in higher elevations must also not make the same assumptions that those living nearer to sea level make about system component selection.
Safety is an important system capability often assumed or not adequately considered. Fire protection considerations, adequate ventilation for personnel, fail-safe automatic controls, hazardous fume, and particulate containment devices, and properly designed egress are among many facility safety concerns.
Other considerations for HVAC Design include the following:
* Ratio of outside air (OA) to return (recirculated) air (% OA)
* Amount of air moving through the HVAC System relative to the amount of air needed to heat and cool the facility
* Localized heat, humidity, and particulate issues within a facility
* Efficiency of air distribution and circulation within a facility.
MG Cooling solutions is an HVAC Company dealing in the same domain.