Table of Contents
- 1 What are the main factors causing reduced boiler efficiency?
- 2 How does a feed water heater affect the performance of a steam power plant?
- 3 How can the efficiency of a boiler be increased?
- 4 What reduces the efficiency of boiler to a greater extent?
- 5 Why it is necessary to heat the water in a feed water heater before feeding it to the boiler?
- 6 How do you reduce boiler losses?
- 7 How do boilers reduce water conductivity?
What are the main factors causing reduced boiler efficiency?
The three main factors in determining efficiency are therefore flue-gas exit temperature, excess air and burnout, all of which are dependent on the technology. The flue-gas exit temperature is related to boiler design rather than the combustor.
How does a feed water heater affect the performance of a steam power plant?
The working principle of a feedwater heater is to heat the feed water before it is heated in the boiler by using turbine extraction steam. However if the feed water heater is able to increase the temperature of the water before it is heated in the boiler, it will reduce the needed heat by the system to produce steam.
How does the feed water temperature affect the fuel consumption of a steam boiler?
Feed Water Temperature 80- 85 deg C to ensure boiler is operated at high efficiency. Any reduction in the water temperature will lead to more time for heating up the water to produce steam, more fuel consumption and decrease in the overall efficiency.
How can the efficiency of a boiler be increased?
15 Ways To Increase Boiler Efficiency
- Increase Boiler Efficiency: Lower the Stack Temperature.
- Install an Economizer.
- Tune the Burner Regularly.
- Install a Variable Frequency Drive.
- Increase Boiler Efficiency: Insulate your Valves.
- Clean the Fireside.
- Preheat Combustion Air.
- Clean the Water Side.
What reduces the efficiency of boiler to a greater extent?
All combustion burners require some degree of excess air. The excess air ultimately absorbs a portion of the heat from combustion. As a result, it reduces the efficiency of the transference of heat to the water in the boiler. This issue may be addressed by calibrating the boiler at multiple firing levels and regularly.
Why boiler feed water is heated?
Boiler feedwater, consisting of fresh water plus returned condensate, is heated in the deaerator to full saturation temperature corresponding to the steam pressure. The purpose is to scrub out and carry away dissolved gases, especially oxygen.
Why it is necessary to heat the water in a feed water heater before feeding it to the boiler?
Preheating the feedwater reduces the irreversibilities involved in steam generation and therefore improves the thermodynamic efficiency of the system. This reduces plant operating costs and also helps to avoid thermal shock to the boiler metal when the feedwater is introduced back into the steam cycle.
How do you reduce boiler losses?
- By lowering the stack temperature of your boiler.
- By controlling the boiler blowdown rate.
- By cleaning the waterside of the boiler.
- Tuning the burner regularly.
- By installing an Economizer.
How do you calculate the efficiency of a Whrb boiler?
In general, we take this formula to calculate waste heat boiler thermal efficiency. η= 100-(q2+q3+q4+q5+q6), which include the Q2 flue gas losses, Q3 gas incomplete combustion losses, Q4 solid incomplete combustion losses, Q5 heat radiation losses and Q6 slag ash physical losses.
How do boilers reduce water conductivity?
Internal Boiler Water Treatments The main internal treatment solutions that you might want to consider include softening chemicals, anti-scaling agents, oxygen scavengers, sequestering agents, and anti-foaming agents, all of which can help with the reduction of conductivity.