What is the first thing that takes place in the condenser?
The superheat must be removed first before the refrigerant can condense. This occurs in the first portion of the condenser known as the desuperheating section.
What is the primary and secondary purpose of the condenser?
2. What is the purpose of the condenser in a high-tension magneto electrical system? To prevent arcing at the points and to hasten the collapse of the magnetic field around the primary coil. The magnetic circuit, the primary electrical circuit, and the secondary electrical circuit.
What are the three phases of the condenser?
What are the three phases of the condenser? De-superheat, condense, and subcool.
What are the three functions that a condenser performs?
A condenser unit used in central air conditioning systems typically has a heat exchanger section to cool down and condense incoming refrigerant vapor into liquid, a compressor to raise the pressure of the refrigerant and move it along, and a fan for blowing outside air through the heat exchanger section to cool the …
What is condenser in HVAC system?
A condenser (or AC condenser) is the outdoor portion of an air conditioner or heat pump that either releases or collects heat, depending on the time of the year. The compressor is the heart of the system since it compresses the refrigerant and pumps it to a coil in the form of a hot gas.
How does a surface condenser work?
A surface condenser is a commonly used term for a water-cooled shell and tube heat exchanger installed to condense exhaust steam from a steam turbine in thermal power stations. These condensers are heat exchangers which convert steam from its gaseous to its liquid state at a pressure below atmospheric pressure.
Which of the following is not surface condenser?
Which of the following is NOT a type of surface condenser? Explanation: Ejector condenser is a type of jet condenser and not a surface condenser.
What is the difference between jet condenser and surface condenser?
1.2. 1 Types of Surface Condensers: 1.2. 1.1 Down flow condenser….Difference between surface condenser and jet condenser.
| S.NO | Surface Condenser | Jet or Direct Contact Condenser |
|---|---|---|
| 3 | Condensate is reused. | Condensate is wasted |
| 4 | It requires large quantity of circulating water. | It requires less quantity of circulating water |
How vacuum is maintained in condenser?
Water is used to condense steam back to liquid water in any form of boiler system, whether on board ship or in power plants. In other words, the specific volume of water at a given pressure is many times lower than that of steam. This enormous reduction in volume creates the vacuum inside the condenser.
What causes the vacuum in the condenser?
A common cause of poor condenser vacuum is excessive air ingress or leakage. Any fall in condenser vacuum would have consequent rise in turbine heat rate vis-à-vis plant heat rate. The objective is to eliminate these defective locations and areas, achieving a vacuum-tight system to maintain the designed rated vacuum.
What is use of the air pumps in the condenser?
For reducing the amount of steam mixed with the air sucked by the air pump, the steam condenser has a portion of tubes near the air pump suction screened off and the condenser tubes in this portion contain the coldest water, and the number of cooling tubes is increased.
How vacuum is created in condenser using ejector?
Abstract. A condenser creates the lowest possible turbine back pressure by evacuating air from a condenser shell. A liquid ring vacuum pump and/or steam-jet air ejector is used to maintain vacuum in a condenser. Heat liberated from turbine exhaust steam is removed by either water or air, or a combination of these.
Why is main condenser kept in vacuum and keep main condenser in vacuum?
The removal of air and other noncondensable gases from the condenser shell side is required for proper heat transfer from steam to cooling water in the condenser and, thus, to maintain high vacuum in the condenser.
What is the principle of steam ejector?
In the steam ejector system, the steam (auxiliary steam) is passed through a nozzle and allowed to expand in one chamber. When the HP steam passes through a nozzle it expands in the chamber and creates vacuum in the chamber; this chamber is connected to the condenser so that the condenser vacuum is created.
What is the function of ejector?
The purpose of the ejector is to transport and compress a weight of induced fluid from the suction pressure to the exit pressure. By staging ejectors it is possible to obtain a very large range of suction pressures from atmospheric down to as low as one micron of mercury absolute.
How does a Hogger ejector work?
The working principle of hogger ejector is that when the steam admission to the hogging ejector wherein the nozzle converts the steam pressure to velocity which pulls out the air from the condenser. On the outside of the nozzle, an air connection is provided.
How vacuum is created in ejector?
In an ejector, a working fluid (liquid or gaseous) flows through a jet nozzle into a tube that first narrows and then expands in cross-sectional area. The fluid leaving the jet is flowing at a high velocity which due to Bernoulli’s principle results in it having low pressure, thus generating a vacuum.
How does ejector system work?
An Ejector works by accelerating a high pressure stream (the ‘motive’) through a nozzle, converting the pressure energy into velocity. The two fluid streams then travel through the diffuser section of the Ejector, where velocity is decreased as a result of the diverging geometry and pressure is regained.
What is difference between ejector and eductor?
1. The eductors are used to remove the air 4 times the volume of the vessel per hour for the vessel entry jobs. whereas the ejectors just suck the excess volume of the system and maintains the system pressure accurately. The difference is with respect to their function and not with respect with their motive fluid.
How do you increase venturi suction?
You can increase air/steam flow to the diffuser or increase the pressure differential from the motive force to the suction stream. I.E. make the diffuser longer and narrower ( larger pipe to a smaller pipe to incresase the pressure into the suction chamber to create greater vacuum).
What is an ejector on a well pump?
The deep-well ejector works in the same way as the shallow-well ejector. Water is supplied to it under pressure from the pump. The ejector then returns the water plus an additional supply from the well, to a level where the centrifugal pump can lift it the rest of the way by suction.
What is the function of air ejector in steam turbine?
the Steam jet ejector are used for air removal on surface condensers. They are simple in operation and rugged in construction, can use a wide range of steam pressures, and will handle wet or dry mixtures of air, gases, or vapors at a near-perfect vacuum.
What does ejector mean?
1 : one that ejects especially : a mechanism of a firearm that ejects an empty cartridge. 2 : a jet pump for withdrawing a gas, fluid, or powdery substance from a space.