ENERGY SAVING SOLUTION

Energy Saving Solution

The various energy saving solution opportunities in boiler system can be related to combustion, heat transfer, possible losses, high auxiliary power consumption, water quality and blowdown. Examining the following factors can indicate if boiler run to maximize its efficiency and energy saving.

The stack temperature should be maintained at lowest possible level. However it should not be so low that water vapor in the exhaust condenses on the stackwalls. This is important in fuels containing significant sulphur as low temperature can lead to sulpur dew point corrosion. Stack temperatures greater than 200 degree centigrade indicates potential for recovery of waste heat.

It also identifies the scaling of heat transfer and or recovery equipment and hence the urgency of taking an early shut down for water/flue side cleaning.

Seven steps of Industry energy saving solutions are Audit & Identify, Prioritize the need, Reduce the usage requirement, Energy efficient solutions, Employee education & behavior change, Generate your own data and Monitor.

Ways to reduce energy consumption of motors:

• Minimizing motor loads

- Ventilation systems (poor fan efficiency, unnecessary bends, etc)

- Pumps and hydraulic systems (poor pump efficiency, excessive pipe lengths)

• Correct motor sizing and selection

- Over sizing of motors (lowers efficiency)

• Controlling the Motor Load

- Variable speed drives

- Variable flow control

Energy saving solution in Compressed Air is based on Size of compressor, Is it working too hard, Type of distribution, Operational Patterns, Leak Identification, Lack of maintenance and No system control or monitoring. 

Feed water preheating using economizer – Typically the flue gases leaving a modern 3 pass shell boiler are at temperatures of 200 to 300 degree centigrade. Thus, there is a potential to recover heat from these gases. The flue gas exit temperature from boiler is usually maintained at a minimum of 200 degree centigrade, so that the sulphur oxides in the flue gas do not condense and cause corrosion in heat transfer surfaces. The potential for energy saving depend on the type of boiler installed and the fuel used. For a typical old model shell boiler, with a flue gas exit temperature of 260 degree centigrade, an economizer could be used to reduce it to 200 degree centigrade.

Incomplete combustion can arise from a shortage of air or surplus of fuel or poor distribution of fuel. It is usually obvious from the color or smoke and must be corrected immediately.

Excess air control – Excess air is required in all practical situations to ensure full combustion, to allow for the variations in combustion and to ensure satisfactory stack conditions for some fuels. This level is based on the furnace design, type of burner, fuel and process variables.

ENERGY SAVING SOLUTIONS

ENERGY SAVING WORDPRESS