What is the state of refrigerant in the liquid line?
When the refrigerant exists in a liquid and vapor state, it is in a condition called saturated. Superheat is measured at the places where the only vapor is present (the suction line) and is the difference between the saturation temperature and the measured temperature.
Is suction line Hot or cold?
When the system is operating, the large insulated suction line should be cold to the touch and sweating at any point where there is no insulation. The smaller uninsulated liquid line should be warm to the touch after the system has been operating for 10 or 15 minutes.
What is the state of refrigerant leaving the condenser?
liquid
What’s the difference between a liquid receiver and a suction accumulator?
The difference between a liquid receiver and a suction accumulator is that: Receivers only allow liquid to leave while accumulators only allow vapor to leave. Suction line. The refrigerant is a high-pressure, warm, subcooled liquid at the inlet of the metering device.
At what temperature does the refrigerant condenser?
120° to 140°F.
What is the difference between a compressor and a condenser?
The compressor “squeezes” the gas. It actually changes the gas refrigerant into a liquid, which is used throughout the A/C system to eventually produce cold air. The condenser is responsible for taking the pressurized gas from the compressor and changing it into a liquid vapor.
What should the condenser split be?
In this article we will discuss a standard-efficiency condenser that normally runs a 25 degree to 30 degree split. Note that condenser splits are not affected by ambient temperature changes.
Does a condenser change Pressure?
Temperature profile inside the condenser In a similar way to evaporation, the only pressure difference between the entrance and the exit of the heat exchanger is the pressure drop. Because the flow velocity in a condenser decreases, the induced pressure drop is much lower than in an evaporator.
What type of condenser uses a fan to push air across the condenser?
An air-cooled condenser uses fans to blow cooler ambient air across the coils through which the system’s refrigerant runs, a process that cools that fluid enough to allow it to cool the evaporator plate.
What is the primary difference between air cooled condensers?
What is the primary difference between air-cooled condensers on lower-efficiency systems and those on high-efficiency systems? The coil size is increased to increase the heat-transfer area. What is the purpose of a cooling tower? It cools the water flowing through it by evaporating a small portion of the water.
Which type of condenser requires the most maintenance?
What type of water-cooled condenser is easiest to clean? Shell and tube. Which requires more maintenance: air cooled condensers or water-cooled condensers? Water-cooled condensers.
Who should be consulted when condenser cleaning is needed?
3. Who should be consulted when condenser cleaning is needed? Someone who is experienced in cleaning and handling chemicals.
What three materials are condensers normally made of?
5 Condensers The most common tube materials in a condenser are copper–nickel alloys, brass, titanium, stainless steel, and ferritic stainless steel.
What is meant by condenser splitting?
Condenser splitting is the method applied to avoid the condenser flooding by dividing the condenser into two equal circuits. The splitting achieved by introducing three way solenoid valve in the liquid line which contains the discharge from the compressor.
Why do condensers have to be cleaned with brushes and others with chemicals?
Why do some condensers have to be cleaned with brushes and other with chemicals ? Some condenser tubes are not straight and will not allow brushes to pass through them. After heat is absorbed into a condenser medium in a water -cooled condenser, the heat can be deposited in one or two places .
What can be used to maintain the head pressure of a system with a water cooled condenser?
A water regulating valve helps to maintain a systems head pressure by modulating the flow of water through the condenser. The desired water flow through a condenser connected to a circulated water system is 1.5 gpm.
Which type of condenser has the lowest operating head pressure?
The type of condenser that has the lowest operating head pressure is the _______cooled condenser.
Why are water cooled condensers more efficient than air-cooled condensers quizlet?
Terms in this set (23) When is the most heat removed from the refrigerant in the condensing process. After heat is absorbed into a condenser medium in a water cooled condenser,the heat can be deposited in one of two places. Air-cooled condensers are much more efficient than water-cooled condensers.
Why are water cooled chillers more efficient than air cooled chillers?
Water-cooled chiller systems have a cooling tower, thus they feature higher efficiency than air-cooled chillers. Water-cooled chillers are more efficient because they condense depending on the ambient temperature bulb temperature, which is lower than the ambient dry bulb temperature.
How much higher does a water cooled condenser condense at when using a cooling tower?
In water-cooled condensers, the refrigerant should condense at 5–10 K above the water inlet temperature, a low value results in a not only higher COP but also higher initial costs.
How is proper head pressure determined for an air cooled condenser?
The main factor which determines the operating head pressure of a plant is the temperature of the condensing medium, which is the air passing over an air cooled condenser or the water in a water cooled system. Hold a thermometer in the air stream to the condenser for 2 to 3 minutes and then note the temperature.