What is evaporator air flow?
What is evaporator air flow?
The evaporator works the opposite of the condenser, here refrigerant liquid is converted to gas, absorbing heat from the air in the compartment. When the liquid refrigerant reaches the evaporator its pressure has been reduced, dissipating its heat content and making it much cooler than the fan air flowing around it.
What is the typical air flow of an air conditioning system for the evaporator coil?
Typical target air flow rates are approximately 350 – 450 cubic feet per minute per ton (47.0 – 60.5 L/S per kW) of cooling capacity. The authors have measured the air flow across the coil in 27 installations in Florida.
What is function of evaporator?
An evaporator is a device used in a process to turn the liquid form of a chemical substance, such as water, into its gaseous form – vapor. The liquid is evaporated, or vaporized, into a gas form of the targeted substance in that process.
Where does the heat come from in an evaporator?
The heat gained in the evaporator in this scenario comes from the indoor air being moved over the evaporator coil. The air is warmer than the refrigerant, so heat leaves the air as it impacts the tubing and fins of the coil because “hot goes to cold.”
What happens to the temperature of the evaporator coil?
When the coil’s temperature is below the dewpoint of the air moving over it, there is also a transfer of latent energy from the air as some of the water vapor in the air condenses to liquid water (condensate) on the evaporator coil. This latent heat transfer does not result in colder air but rather a lower moisture content in the air.
What happens when the evaporator airflow is decreased?
In this theoretical system, when the airflow is decreased, and all else stays the same, the following things will occur: Mass airflow will decrease, meaning there are fewer molecules moving across the coil. Air velocity will decrease, meaning the air is moving over the fins and tubing more slowly.
Why does an air conditioner need more air flow?
The air conditioner cares about the mass flow of air over the coil, not the volume flow, which is why more airflow in CFM is required in high altitudes where the air density is lower. In other words… Mass flow is what matters and when air gets less dense; we need more air volume to move the same amount of heat.
What is the function of a heater control valve?
It’s worth mentioning that many vehicles have what is called a heater control valve, which is used to regulate the flow of coolant through the heater core. This shuts off the flow of hot coolant to the heater core during the summer when you’re trying to run your AC.
What is the theory of an air conditioning system?
Air Conditioning Theory Air Conditioning System 1. The compressor sucks in & compresses the cool R134a refrigerant gas, causing it to become hot, high pressure gas. 2. This hot gas runs through the condenser & dissipates its heat into its cooling air flow and condenses into a liquid. 3. The high pressure liquid enters the
How does an air conditioning system work in a car?
Air Conditioning Theory A/C System Basic Operation Air from either the interior of the vehicle (Recirculation Air Inlet Mode) or from the exterior of the vehicle (Fresh Air Inlet Mode) is sucked into the HVAC unit by an air flow moving device called a blower assembly.
