HVAC Heat Exchangers Explained The basics working principle how heat exchanger works
The Engineering Mindset・16 minutes read
The text discusses various heat exchangers used in HVAC systems and building services, including coil and plate designs, trench heaters, and heat pipes. Different methods like conduction, convection, and radiation are employed to transfer thermal energy between hot and cold fluids efficiently.
Insights
- Heat exchangers play a crucial role in HVAC systems by facilitating the transfer of thermal energy between hot and cold fluids, utilizing methods like conduction, convection, and radiation.
- Various designs of heat exchangers, such as coil, plate, and heat pipes, serve specific purposes in efficiently heating or cooling water and air in buildings, with options like chilled beams and furnace heaters catering to different needs within HVAC systems.
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Recent questions
What are the common designs of heat exchangers?
Coil and plate designs are common.
What fluids are used in HVAC systems for heat exchange?
Water, steam, air, refrigerant, or oil.
How do heat exchangers transfer thermal energy?
Through conduction, convection, and radiation.
What specific heat exchangers are used in commercial buildings?
Chilled beams, trench heaters, and duct electric heaters.
How do furnace heaters in North American homes transfer heat?
Through a heat exchanger using convection.
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Summary
00:00
Efficient Heat Exchangers in HVAC Systems
- Paul from theengineeringmindset.com discusses heat exchangers in HVAC and building services.
- Danfoss sponsors the video, offering various heat exchangers for efficiency and space-saving.
- Heat exchangers transfer thermal energy between hot and cold fluids.
- Thermal energy transfer methods include conduction, convection, and radiation.
- Fluids like water, steam, air, refrigerant, or oil are used in HVAC systems.
- Heat exchangers either heat or cool water or air in HVAC systems.
- Coil and plate designs are common in heat exchangers.
- Thin tube coils are prevalent in various systems like air handling units and refrigerators.
- Duct plate heat exchangers exchange thermal energy between air streams without mixing.
- Heat exchangers like trench heaters and duct electric heaters serve specific purposes in buildings.
13:35
Efficient Heat Transfer Methods in HVAC Systems
- Heat pipe is a sealed copper pipe with a bulb at the top, allowing water to evaporate into steam to transfer heat to water passing through the header.
- Chilled beams, both active and passive, are used in commercial buildings to cool air by passing cool liquid through a tube heat exchanger.
- Furnace heaters in North American homes use a heat exchanger to transfer heat from combusted fuel to ducted air through convection.
- Plate heat exchangers, including gasket and brazed plate types, transfer thermal energy efficiently, with gasket types allowing for capacity adjustment and brazed types being sealed units with fixed capacity.
