In this article we will discuss about the topic of “Low Discharge Pressure” and also we will briefly discuss the others facts like types, causes, and how with the some several facts are directly related with the low discharge pressure.
Low discharge pressure can be defined as when the gases are discharges under the pressure of the gas in the range between some millitorr to very less than the atmospheric pressure. In the system if the pressure of suction side is increasing continuously then the phenomenon is increases inside the system.
The capacity of the compressor of the refrigeration system is decreases when the quantity of the inside temperature in increasing for some defects of the system. The benefit of the low discharge pressure is it’s required very less amount of power because the rate of the volume combination is less than the discharge substances.
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The benefit of the low discharge superheat is the discharge is easily can be achieve uniformly .In the system only the plasma gas is flow in the plasma chamber when the air-conditioning system is pumped . The ionized gas present in the system is argon that is the big reason to break it very easily by chemically.
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The phenomenon is of the air conditioning system can be easily resolve by following some steps. The coils in the refrigeration system carried dirt. When the dirt are mixed with the air which is flowing in the compressor’s suction line to the evaporator coils the temperature is increases and lower head pressure is appear inside the system.
The problem is mainly begins from the compressor of the refrigeration system. If we beginning of the process go through in the condition of the compressor and check the discharge valve of the compressor then the low discharge pressure can be avoided without any hassle.
Now the other process to control the low discharge valve into the refrigeration system is to check the inside condition of the valve of the evaporator. By the help of the evaporator coil the refrigerant is passes through from the compressor to the evaporator. In this situation to avoid the unwanted situation need to open the valve of the expansion.
And we should to check the condition of the evaporator in the refrigeration system.
The low discharge pressure easily can be check by the measuring instruments like Manometer and Bourdon tube gauge.
What is low discharge pressure?
When the excessive amount of refrigerant is present in the suction line of the compressor then the heat cannot flow properly across the coils of the evaporator in the refrigeration system.
In the air conditioning system simultaneously when the pressure is excessive lower than the normal pressure this condition called the low discharge pressure. In the low discharge pressure the temperature is excessive higher than the normal temperature and refrigerant is present in suction line of the compressor in a particular area.
The excessive amount of the refrigerant is present in the compressor’s suction line which is not suitable for the air conditioning system.
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The coils which are used in the refrigeration system usually these are made with metal. The main reason using the metal is less power will be needed for generating the heat in the system.
The low discharge pressure is created unbalanced condition in the whole refrigeration system. In this condition the amount of pressurized refrigerant near about 65 – 75 pound per square. The refrigerant is pressurized in the compressor’s suction line and inside temperature is gradually an increase without any limitation. The low discharge pressure also slows down the refrigeration cycle.
In the refrigeration system inside the suction lime and the in the coils mainly metals are used. The metal is chosen for the systems which are good in heat conduction. The name of the metal is copper and alternatively the tungsten also can be used. With the help of the suction line the evaporator valve and the condenser’s whole unit are connected.
Low discharge pressure high suction pressure:
In this section we will discuss about the topic of low discharge pressure high suction pressure.
In the refrigeration system the low discharge pressure is generates for the bad condition of the equipment. The leakage is present in the return line of the oil separator, the piston’s condition of the compressor is not well or the discharge valve which is placed in the outside of the compressor is generate lower pressure than the regular pressure and increases unwanted temperature is excessive inside the system is appear low discharge pressure.
The condition for the low discharge pressure the capacity of the system became less.
Most of the discharges in the refrigeration system used in the industry related to the semiconductors.
Low discharge pressure type:
When the proper reason behind the low discharge pressure is not detect properly that time the pressure gauge can be used in the compressor of the refrigeration system.
Types of the range of reading is given below,
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The low discharge pressure for an air conditioning system is increases when the amount of insufficient compressor is more than the usual amount. So, the low discharge pressure cannot be classified only the range of the air conditioning system it can be only read by the measuring instruments.
The reading range of the air conditioning system where the low discharge pressure is appearing is between 155 PSI to 30 PSI.
The ranges of the reading for the air conditioning system is summarize briefly in below,
1. 250 PSI / 30 PSI – If the unwanted amount of air is present inside the air conditioning system then this range of reading is appearing.
2. 250 PSI / 50 PSI – From the range reading we can recognize the inside condition of the condenser. The condenser may be not cool as much it’s required or may be somewhere blocked.
3. 225 PSI / 80 PSI – This range of reading tell us that the refrigerant is present in excess amount in the compressor some leakage is present in the expansion valve and also the size is too large.
4. 200 PSI / 70 PSI – This range of reading directly shows some blockage definitely present in the refrigeration system or may be in device of the expansion.
5.160 PSI / 10 PSI – This range of reading denoted that frosting is happened inside the evaporator of the refrigeration system. This situation is happened when pressure is too low in the pipe or may be the clogged of the valve of the expansion. For resolve the problem need to check the evaporator or the evaporator valve.
6.150 PSI / 30 PSI – The range is appearing when in the cooling medium of the refrigeration cycle water is carry by the refrigeration system.
7.150 PSI / > 10 PSI – The range of reading of the air conditioning system helps to understand that, in the refrigeration system some leakage is must be present. The leakage can be easily detected by the technician. If the problem can be solve at beginning of the process then the low discharge pressure cannot be arise.
8.125 PSI / 30 PSI – The range for the refrigeration system gives us a clear concept that, the whole system is not carry the sufficient charged or may be excessive amount of oil is carry by the oil separator.
9.100 PSI / 100 PSI – The range is clearly gives us the clear concept about the condition of the compressor in the refrigeration system. In this range the compressor cannot be engage just because the brunt coil not transfers the power.
10. 50 PSI / 50 PSI – By this range of the reading we could understand the inside condition of the clutch for the refrigeration system.
Low discharge pressure cause:
In this portion of the article we will discuss about the causes of the of the low discharge pressure.
The reasons which are consider to as primary causes for the low discharge pressure is,
1. Malfunction of the thermostatic expansion valve
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2. The condition of the refrigerant is when under the charge
The secondary reasons for the low discharge pressure is discuss in below section,
1. The leakage of the valve of the compressor: The common problem for the air conditioning system of the discharge valve of the compressor is the leakage. If we go through the air conditioning reading then the range of the reading is about 150 PSI. The condition in practically very hard to detects. Only the condition can be fixed by professional technician.
2. The compressor’s piston rings face the damage: The discharge gas is emitted by holes present in the compressor’s piston ring the pressure of the refrigeration cycle became low more than the regular pressure and low discharge pressure is happened in the system.
3. Leakage from oil separator to the return line:
4. Overcharged of the refrigerant:
The electronic expansion valve size is more than the normal size then the overfeeding is happened in the electronic expansion valve and the low discharge pressure is causes in the system.
5. Increasing the temperature:
When the air of the refrigeration system could not flow properly across the suction line of the compressor as a result excess amount of temperature is an increase which is not good for the system.
6. Size of the valve is excessive: The valves which are present in the air-conditioning system are larger than the regular size then the low discharge pressure is appearing.
7. The charge of the refrigeration is very low
8. The air distribution is not done properly
Hi..I am Indrani Banerjee. I completed my bachelor’s degree in mechanical engineering. I am an enthusiastic person and I am a person who is positive about every aspect of life. I like to read Books and listen to music.
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