What is a two pass condenser?
What is a two pass condenser?
Two passes Surface Condenser is a device used to transfer heat between a steam and a fluid, or between two or more fluids. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. 3-Steam mass flow rate, kg/s.
What is the purpose of a surface condenser?
In thermal power plants, the purpose of a surface condenser is to condense the exhaust steam from a steam turbine to obtain maximum efficiency, and also to convert the turbine exhaust steam into pure water (referred to as steam condensate) so that it may be reused in the steam generator or boiler as boiler feed water.
What is pass in condenser?
This refers to the number of times the fluid in the tubes passes through the fluid in the shell. Surface condensers in power plants are often 1-pass straight-tube heat exchangers (see surface condenser for diagram). Two and four pass designs are common because the fluid can enter and exit on the same side.
What is the difference between condenser and surface condenser?
Surface condensers (or non-mixing type condensers). In surface condensers, there is no direct contact between the exhaust steam and the cooling water. In jet condensers there is direct contact between the exhaust steam and cooling water.
What is the difference between two pass and single-pass condensers?
Types of Heat Exchangers Summary Single-pass heat exchangers have fluids that pass other only once. Multi-pass heat exchangers have fluids that pass each other more than once through the use of U tubes and baffles. Regenerative heat exchangers use the same fluid for heating and cooling.
What is a 2-pass heat exchanger?
This type of flow creates a thermally longer heat exchanger, while still maintaining the same compact product footprint. The most frequently used version of this is the 2-pass execution, where the flow travels 2 times the plate length before exiting on the other side.
What are the types of surface condenser?
There are 4 basic types of surface condensers,
- Downflow surface condenser.
- Central flow surface condenser.
- Evaporative surface condenser.
- Regenerative surface condenser.
What are the advantages of surface condenser over jet condenser?
There is a high vacuum obtained compared to the jet. Water used for cooling is reused without any treatment. For high capacity plants, it is More advantageous.
What is a two pass heat exchanger?
Which condenser is better surface or jet?
1 Types of Surface Condensers: 1.2. 1.1 Down flow condenser. 1.2….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 |
What are the merits and demerits of surface condenser?
ADVANTAGES AND DISADVANTAGES OF A SURFACE CONDENSER
- The condensate can be used as boiler feed water.
- Cooling water of even poor quality can be used because the cooling water does not come in direct contact with steam.
- High vacuum (about 73.5 cm of Hg) can be obtained in the surface condenser.
- The capital cost is more.
What is an evaporator used for?
An evaporator is a device used in a process to turn the liquid form of a chemical substance, such as water, into its gaseous form – vapor. The liquid is evaporated, or vaporized, into a gas form of the targeted substance in that process.
How are the tubes in a steam condenser arranged?
Condenser tubes are arranged as tube bundles in condenser shell with a single-pass or two-pass. The bundle shape and air cooler location are optimized by the supplier. The design of single-pass condenserprovides cooling water flow through straight tubes from the inlet waterbox on one end, to outlet waterbox on the other end.
How does a surface condenser affect a dry cooling tower?
Due to reduction of the terminal temperature difference TTD and condenser pressure, the power of the turbine is increased compered with a surface condenser with a dry cooling tower. But the comparison is complete if the consequences on the overall economy of the cooling systems are investigated:
Which is the best form of steam condenser?
Another form of condensing system is the air-cooled condenser. They are more environmentally acceptable forms of condensing steam. The process is similar to that of a radiator and fan. Exhaust steam from the low pressure section of a steam turbine runs through the condensing tubes.
How is the exhaust connected to the steam condenser?
In dry cooling systems, the turbine exhaust is connected directly to the air cooled steam condenser (direct cooling system). The steam exhaust duct has a large diameter and is usually as short as possible to reduce pressure losses.
