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Showing posts from April, 2023

Steam turbine condenser losses

The condenser in a steam turbine system plays a critical role in the power generation process by converting the exhaust steam from the turbine back into water, which can then be reused in the boiler. However, the condenser itself can experience losses, which can impact the overall efficiency of the system. Condenser losses can be broadly classified into two categories: thermal losses and mechanical losses. Thermal losses occur due to the temperature difference between the condensing steam and the cooling water. This temperature difference can lead to heat transfer losses and reduce the efficiency of the system. Factors that can impact thermal losses include the temperature and flow rate of the cooling water, the surface area of the condenser tubes, and the design of the condenser. Mechanical losses occur due to the resistance of the condenser components, such as the tubes, baffles, and pumps, to the flow of steam and cooling water. This resistance can lead to pressure losses and can im

Losses in steam turbine

There are several types of losses that occur in a steam turbine, which can impact its overall efficiency. These losses include: 1. Friction Losses: Friction losses occur due to the resistance between the moving parts of the steam turbine, such as bearings, seals, and other components. These losses can lead to increased wear and tear on the turbine components and can reduce its efficiency. 2. Windage Losses: Windage losses occur when the rotating blades of the turbine interact with the surrounding air, creating turbulence and resistance. This can result in increased power requirements and reduced efficiency. 3. Blade Profile Losses: Blade profile losses occur due to the shape and design of the turbine blades. The shape of the blades can impact the amount of steam that can flow through the turbine and can lead to increased losses. 4. Leakage Losses: Leakage losses occur due to steam escaping from the turbine, either through the sealing components or through the blade clearances. This can

Oxygen trimming in coal fired boiler

Oxygen trimming is a process used in coal-fired boilers to optimize combustion efficiency and reduce emissions. The term "oxygen trimming" refers to the control of the amount of excess oxygen in the combustion process by adjusting the air flow and fuel flow rates. In a coal-fired boiler, air is typically supplied to the combustion chamber through a series of air registers. The amount of air supplied is typically greater than the amount of oxygen required for complete combustion of the coal. This excess air is referred to as "excess oxygen." Oxygen trimming involves monitoring the level of oxygen in the flue gas and adjusting the air and fuel flows to maintain the desired level of excess oxygen. By reducing the amount of excess oxygen, combustion efficiency can be improved, which in turn reduces the amount of fuel required to generate a given amount of steam or heat. In addition to improving combustion efficiency, oxygen trimming can also reduce emissions of nitrogen

Why canister vent is provided in condensate extraction pump?

A canister vent is provided in a condensate extraction pump in a thermal power plant to prevent the buildup of air and other gases in the pump casing. As the pump operates, air and other gases can enter the casing and collect in the top of the casing, reducing the efficiency of the pump and potentially causing damage. The canister vent is a small opening in the top of the pump casing that is connected to a vent pipe. The vent pipe is typically routed to a location where the air and other gases can be safely vented to the atmosphere. By providing a canister vent, the air and other gases that collect in the top of the pump casing can be continuously vented to the atmosphere, preventing the buildup of pressure and ensuring that the pump operates efficiently. This helps to prevent damage to the pump and reduces maintenance requirements. In addition, the canister vent also helps to prevent the formation of a vacuum inside the pump casing. A vacuum can occur when air and other gases are no