HVAC system Basics for Beginners

Are you a property owner, property manager, aspiring engineer or Tech enthusiast and you do not have the basic knowledge of HVAC systems? If yes, then you are reading the right introductory piece. All you need do is sit back, and pay raft attention.
HVAC refers to Heating, Ventilation and Air Conditioning systems. These systems are an essential part of residential, commercial and industrial buildings. The objective of HVAC systems is to control the circulation of air and moisture within living spaces while maintaining thermal comfort. HVAC system can also be regarded as climate controllers.
In more technical terms, the functions of an effective HVAC system include control of air movement, temperature and moisture control inside an air-conditioned confinement, air filtration and supply of fresh air for the control of carbon dioxide and oxygen levels in a conditioned space. A typical example of HVAC systems is the big air conditional blocks you might on rooftops of offices or apartment blocks.
Over the years, air conditioning has moved from the mere supply of cool air to the effective control of critical parameters such as air movement, temperature, humidity etc.
HVAC systems are of various types with one having its own advantage over the other. These types are:
• Packaged Systems
• Split Systems
• Ductless Split System
• Hybrid Heat Split
The technicalities of these types of HVAC systems will be elaborately discussed in subsequent articles.
Components of a Heating, Ventilation and Air Conditioning System (HVAC)
As a beginner, it is important to be familiar with the various parts of a HVAC system so that in the event of a slight technical complication, you will be able to identify the affected part. The effective functionality of each of the components of a HVAC system relies solely on one another (one must function effectively for the other to work properly). Here is a list of the key components of a HVAC system you must know:
1. Evaporator: this component is saddled with the responsibility of absorbing condenser heat load and ensuring that the HVAC cools properly.
2. Compressor: this component is widely referred to as the soul of HVAC systems; it provides the thrust and energy required to transport refrigerant around the system.
3. Condenser: this component forces out heat build-up inside the refrigerant to the outside air.
4. Thermostatic Expansion Valve (TEV): this device regulates the quantity of liquid refrigerant passing through the evaporator thereby maximising evaporator efficiency.
5. Boiler: this component of HVAC systems is responsible for the heating of water.
6. Duct Systems: A duct system serves as cool or warm air distribution point. It can either be flanged, rectangular or spiral.
7. Evaporator Blower Motor (EBM): this component forces air through the ducts.
8. Condenser Fan Motor (CFM): fan motor rejects heat load and maintains maximum head pressure required for operation of the compressor.
9. Furnace: this component is responsible for the transportation of air into the duct systems from the heat exchanger.
Other components include Chillers, Cooling Towers, pumps, Building Automation Systems (BAS) also referred to as Energy Management Monitoring Systems (EMMS)