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At very low suction pressure, the suction valves of reciprocating compressor will not work and there will be no gas in the cylinder during compression stroke, resulting some damage to the suction valves. If low suction pressure trip protection is not provided there can be some abnormal damage.
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What is an hermetic compressor?
a fully welded or serviceableIn hermetically sealed compressor, the compressor and the motor are enclosed in the welded steel casing and the two are connected by a common shaft. This makes the whole compressor and the motor a single compact and portable unit that can be handled easily. The hermetically sealed compressor is very different from the traditional open type of compressors in which the compressor and the motor are different entities and the compressor is connected to the motor by coupling or belt.Construction of the Hermetically Sealed Reciprocating CompressorIn hermetically sealed compressor, in one side of the enclosed casing the various parts of the compressor like cylinder, piston, connecting rod and the crankshaft are located. If it is a multi-cylinder compressor, there are more than two cylinders inside the casing. On the other side of the casing is the electric winding inside which the shaft of the motor rotates. This motor can be single speed or multi-speed motor. In hermetically sealed compressors the crankshaft of the reciprocating compressor and the rotating shaft of the motor are common. The rotating shaft of the motor extends beyond the motor and forms the crankshaft of the hermetically sealed reciprocating compressor.All these parts of the hermetically sealed compressor are assembled and enclosed in a strong and rigid casing made up of welded steel shell. The steel shell comprises of two half rounded steel bodies that are welded together to form the casing for the hermetically sealed compressor. In some cases the two halves of the shell can be bolted together instead of welding, which permits easy opening of the casing in case of compressor burnout.The hermetically sealed compressors have inbuilt lubrication system for the lubrication of the piston and cylinder and crankshaft. The lubricant also acts the coolant for the piston and cylinder. Additionally, the cool suction refrigerant also offers cooling effect. Externally, the casing has refrigerant suction and discharge connections that are connected to the evaporator and condenser respectively. There is also socket for the electrical connection.The typical condenser unit with the hermetically sealed compressor is shown in above fig. Such condenser units are called as hermetic condenser units. In the other image various parts of hermetically sealed multi-cylinder reciprocating compressor are shown.Types of Hermetic CompressorsOne of the most popular types of the hermetically sealed compressors are the reciprocating compressors. They were the first to be used as the hermetically sealed compressors are still being used widely. These days the vane type of rotary compressor has become more popular. It is considered that the rotary type of hermetically sealed compressor consumes less electricity, makes lesser noise, requires lesser maintenance, and is cheaper than the reciprocating type of hermetically sealed compressor. This is because the rotary compressors has less frictional parts and have only a rotor. The centrifugal types of hermetically sealed compressor are used for the large units.
Why compressors are in black color not in other color?
To get better cooling because of Black Body radiation effect whihc is highest.
What is whipping in connecting rod?
due to the inertia effect of the reciprocating masses, connecting rod suffers some perpendicular stress, which causes rapid vibrations at high speed, and tends to produce peculiar motion, this is called whipping action , it also causes bending action in connecting rod.
What would the head pressure do if the fan motor on an air-cooled condenser stopped working?
The head pressure and compressor current would normally rise (strong winds and/or rain and/or very low air temperatures will reduce this effect). Less heat would be removed from the refrigerant and therefore deliver less cooling.
What is the working pressure for NPT thread's?
1/4" thru 1/2" can be rated as high as 15,000 psi 3/4" thru 1" can be rated as high as 10,000 psi Anything larger would only be rated no higher then 5000 psi. ..... But the type of material/wall thickness will directly effect the working pressure ratings
What effect does enlargement of the thoracic cavity has on the air pressure inside the lungs?
reduces intra-thoracic pressure which creates suction that draws air into lungs
How is suction created?
Suction is created by reducing the pressure in a space, causing air or fluid to move into that space due to the pressure difference. For example, when you suck on a straw, you create low pressure in your mouth, causing liquid to rise up the straw.interopRequireDefaultThis creates a vacuum effect that pulls the fluid into the space with lower pressure.
How does an eductor work to create a vacuum or suction effect in a fluid system?
An eductor works by using high-speed fluid flow to create a low-pressure area, which causes suction or a vacuum effect in a fluid system. This low-pressure area draws in fluid or gas from the surrounding environment, allowing the eductor to effectively move and mix fluids within the system.
What is the effect of high gas suction pressure in a gas compressor?
High gas suction pressure in a gas compressor can lead to increased power consumption, reduced compressor efficiency, and potential damage to the compressor components due to excessive load. It can also result in higher discharge temperatures and potential overheating of the compressor.
Why you have to connect the pressurization unit pipes to the pump suction of the chilled water pump and not to discharge header?
As the chilled water system is a close system and basically consist of two loops i.e one loop from pump discharge to load & second loop from load to pump suction.Now,the effect of pressure drop will be more prominent in the second loop ,after the flow exit the load.Hence we have to alleviate the pressure where the effect of pressure loss & small water requirement is more prominent and i.e the suction side of the pump.
Why is it difficult to pull a sucker from the surface?
It is difficult to pull a sucker from the surface because of the suction force created by the contact between the sucker and the surface. This suction force is due to the difference in pressure between the inside of the sucker and the surrounding atmosphere, creating a vacuum effect that keeps the sucker attached firmly.
What is an hermetic compressor?
a fully welded or serviceableIn hermetically sealed compressor, the compressor and the motor are enclosed in the welded steel casing and the two are connected by a common shaft. This makes the whole compressor and the motor a single compact and portable unit that can be handled easily. The hermetically sealed compressor is very different from the traditional open type of compressors in which the compressor and the motor are different entities and the compressor is connected to the motor by coupling or belt.Construction of the Hermetically Sealed Reciprocating CompressorIn hermetically sealed compressor, in one side of the enclosed casing the various parts of the compressor like cylinder, piston, connecting rod and the crankshaft are located. If it is a multi-cylinder compressor, there are more than two cylinders inside the casing. On the other side of the casing is the electric winding inside which the shaft of the motor rotates. This motor can be single speed or multi-speed motor. In hermetically sealed compressors the crankshaft of the reciprocating compressor and the rotating shaft of the motor are common. The rotating shaft of the motor extends beyond the motor and forms the crankshaft of the hermetically sealed reciprocating compressor.All these parts of the hermetically sealed compressor are assembled and enclosed in a strong and rigid casing made up of welded steel shell. The steel shell comprises of two half rounded steel bodies that are welded together to form the casing for the hermetically sealed compressor. In some cases the two halves of the shell can be bolted together instead of welding, which permits easy opening of the casing in case of compressor burnout.The hermetically sealed compressors have inbuilt lubrication system for the lubrication of the piston and cylinder and crankshaft. The lubricant also acts the coolant for the piston and cylinder. Additionally, the cool suction refrigerant also offers cooling effect. Externally, the casing has refrigerant suction and discharge connections that are connected to the evaporator and condenser respectively. There is also socket for the electrical connection.The typical condenser unit with the hermetically sealed compressor is shown in above fig. Such condenser units are called as hermetic condenser units. In the other image various parts of hermetically sealed multi-cylinder reciprocating compressor are shown.Types of Hermetic CompressorsOne of the most popular types of the hermetically sealed compressors are the reciprocating compressors. They were the first to be used as the hermetically sealed compressors are still being used widely. These days the vane type of rotary compressor has become more popular. It is considered that the rotary type of hermetically sealed compressor consumes less electricity, makes lesser noise, requires lesser maintenance, and is cheaper than the reciprocating type of hermetically sealed compressor. This is because the rotary compressors has less frictional parts and have only a rotor. The centrifugal types of hermetically sealed compressor are used for the large units.
Why does the toilet water move when it's windy?
When it's windy, the air pressure outside the house changes, causing the air pressure inside the house to also change. This change in air pressure can create a suction effect on the plumbing system, causing the water in the toilet bowl to move or ripple.
Why does toilet water move when it's windy?
When it's windy, the air pressure outside the house changes, causing the air pressure inside the house to also change. This change in air pressure can create a suction effect on the plumbing system, causing the water in the toilet bowl to move or ripple.
Can really fast spinning cause suction?
Yes, fast spinning can create suction due to the principles of fluid dynamics. When an object spins rapidly, it generates a low-pressure area in its center, drawing in surrounding air or fluid. This effect is similar to how a tornado forms, where the high-speed rotation creates a vacuum that pulls in debris and air. However, the degree of suction depends on the speed of the spin and the shape of the object.
If suction valve of the centrifugal pump being closed in running what will be a effect?
It will damage the pump.
How do you measure pressure and what effect does it have on our weather?
on a pressure meter it has no effect
