Table of Contents
What is the purpose for having the refrigerant subcooled as it leaves the condenser?
Condenser subcooling ensures that there is a liquid seal at the condenser’s bottom so the liquid line or receiver will not be fed with vapors. This condition prevents any noncondensables, like refrigerant vapor or air, from leaving the condenser’s bottom and entering the receiver or liquid line.
Why does cooling water flow inside the tubes and steam condense outside the tubes?
The cooling water from the cooling water inlet is filled inside the tubes and the exhaust steam from exhaust steam inlet enters into the cylinder surrounding, thereby rejecting the heat and condenses the steam into the water which is collected at the bottom of the condenser and the impure water is sent out from the …
Which of the following is used to increase heat transfer in surface condenser?
Use of rolled or finned tubes increases the surface per unit length as well as enhancing heat transfer from vapor and water.
What sends the cooling liquid into the condenser?
As it cools down the high pressure gas condenses into liquid, which is still at a high pressure. The refrigerant enters the condenser as a superheated (hot) high pressure gas, it dumps its heat into the air being blown across by the fan, this drop in temperature condenses the refrigerant.
How far to what point is the refrigerant subcooled at the condenser outlet?
Refrigerant is usually subcooled between 10 degrees and 20 degrees at the outlet of the condenser.
How is air removed from the shell side of a condenser?
This evacuation may be realized either by using a vacuum pump or with the help of a steam jet-air ejector. Either of these vacuum-creating devices sucks air from the condenser shell and discharges it to the atmosphere.
In which condenser water is circulating through tubes and steam is flowing in surrounding shell?
Surface condenser Commonly, the cooling water flows through the tube side and the steam enters the shell side where the condensation occurs on the outside of the heat transfer tubes.
What happens when air is removed in a surface condenser?
In a surface condenser if air is removed, there is.
How does an air condenser work?
Condenser: The condenser is a set of coils, also located inside the outdoor unit. Here, a fan blows across the coils, dissipating the heat from the refrigerant inside them and allowing it to convert back into a liquid, at which point it’s sent back inside to start the process over again.
Which one of the following is NOT effect of liquid subcooling?
Which one of the following is not effect of liquid sub cooling? Explanation: Sub cooling the liquid reduces the compressor power per ton of refrigeration due to reduced mass flow rate of refrigerant. It also increases the refrigeration effect, reduce the piston displacement and increase the COP.
What causes low Subcool?
Low Subcooling is an indication that not enough refrigerant is contained or “packed” in the condenser. This can be due to undercharge, poor compression, or a metering device oversized or failing open (overfeeding).