Manual heat load calculations in HVAC

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Manual heat load calculations in HVAC

Manual heat load calculations in HVAC

Types of HVAC Condensers:

 There are three types of HVAC condensers that depending on the cooling method that they used. An HVAC condenser is an important part of your cooling system. Condensers can either be

1. Water-cooled Condenser

2. Air-cooled Condenser

3. Air and Water-cooled Condenser (Evaporative type)

Water-cooled Condenser:

• A Water-cooled condenser works by moving water through the annular space between the tubes or coils.
•  Water acts as the cooling medium.
• Water-cooled condensers require a constant supply of water to prevent corrosion

Types of Water-cooled Condensers:

a. Double Pipe Condenser

b. Double Tube Condenser

c. Shell and Coil Condenser

d. Shell and Tube Condenser

HVAC Instrumentation and Controls

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Cooling Tower:

• Cooling Towers are heat removal devices used to transfer waste heat to the atmosphere.
• Cooling towers are required for recirculation of condenser water.
• The warm water being pumped by the condenser should be cooled with the help ofcooling towers, so that the same water may be re-circulated to the condenser.

Types of Cooling Towers:

According to the method adopted to circulate the air, cooling towers may be classified as:

a. Natural Draft Cooling Towers :

• The air is circulated inside the cooling tower by natural convection. The natural draft cooling towers are further classified as: Spray Type and Splash Deck Type.

b. Mechanical Draft Cooling Towers:

• The Mechanical Draft Cooling Towers are similar to Natural draft cooling towers, but the air is circulated inside the tower MECHANICALLY. Propeller fans or centrifugal fans may be used.
• Mechanical draft cooling towers are much smaller than the natural draft cooling towers.

They are further classified as:

a. Forced Draft Cooling Towers – A fan is located near the bottom and on the side. This fan forces the air from bottom to top.

b. Induced Draft Cooling Towers – A fan is located at the top, takes suction from the tower and discharges it to the atmosphere.

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