What Exactly Does A Heat Exchanger Do ?

It is important to note that your HVAC equipment is not responsible for producing cool energy. HVAC systems work by transferring heat (thermal energy) from one area to another. That is exactly what a heat exchanger does: it moves thermal energy from one place to another. Therefore, when it is hot outside, your HVAC system and its heat exchanger are responsible for removing thermal energy from your home and storing it when it is cold outside.

Sa179tubes.com Manufacturer ASTM A178 And ASME SA178 Tubes. Heat exchangers all transfer heat from one fluid to another, but they function in a variety of ways. Shell-and-tube and plate/fin heat exchangers are two of the most common types. Shell and tube heat exchangers pass one fluid through a set of metal tubes, while a second fluid passes through a sealed shell that surrounds them. It is possible for two fluids to flow in opposite directions (known as parallel flow).  

Each of these materials has its own advantages. Ceramics are especially well suited for high-temperature applications (above 1000 °C or 2000 °F) that would melt metals such as copper, iron, and steel, although they’re also popular for applications with corrosive and abrasive fluids at high or low temperatures. Plastics typically weigh less and are less expensive than metals, resist corrosion and fouling, and can be engineered to have good thermal conductivity, but tend to be mechanically weak and may degrade over time. 

ASTM A178 And ASME SA178 Tubes Are Very Useful Improving Quality & Strength Of Heat Exchanger. While plastic exchangers are generally not suitable for high-temperature applications, they could be used for everyday, room-temperature applications such as a swimming pool. Composite heat exchangers combine the best features of their parent materials—for example, the high thermal conductivity of metal with the reduced weight and the corrosion resistance of plast

When your furnace is on, hot combustible gases are sent to your heat exchanger. The heat from the combustion gases is transferred to the metal walls within the heat exchanger, causing those metal walls to heat up.

Since the walls are now heated, cold air from your house passes over those hot metal walls on the outside of the heat exchanger. It allows your home’s air to heat up without picking up those dangerous combustible gases within the heat exchanger. The warm air is then distributed throughout your home through your ductwork.

However, those dangerous combustible gases need a place to escape. Gases are blown out of the heat exchanger and vented outside of your home with standard furnaces. High-efficiency furnaces cycle those gases through a second heat exchanger, where even more heat is drawn from those gases and used to further heat your home.