What is an economizer in a boiler?
Economizers are heat exchangers that transfer the heat in the flue gas to another medium‚ generally the boiler feed-water‚ although other streams are sometimes used such as make-up water.
How does a boiler economizer system work?
A boiler economizer is essentially a heat exchanger that makes a system more energy efficient by taking enthalpy in fluid streams that are hot, but not hot enough to be used in a boiler – hence recovering more useful enthalpy and improving the steam boiler’s efficiency.
Where is economizer located in boiler?
Economizers are installed in the exhaust gas flow from the boiler. They take heat from the flue gases which they transfer via extended surface elements to the feedwater immediately prior to the water entering the boiler.
What is the main purpose of an economizer?
An economizer uses outside air to help control indoor temperatures and achieve greater energy efficiency. Economizers are commonly used in data centers to reduce the reliance on cooling devices, such as chillers, compressors or computer room air conditioners.
How does a economizer work?
Economizers reduce air conditioning costs by using outside air (OSA) for free cooling causing the compressor to run less. OSA dampers switch over to minimum OSA when free cooling is not available. Economizer dampers switch to minimum ventilation position when OSA conditions are not favorable for cooling.
What is inside an economizer?
The economizer is made of an aluminium and stainless steel alloy. The gases pass through the cylinder, and the water passes through the finned tubes. It condenses about 11% of the water contained in the gases.
How does an economizer work?
How economizer increases the efficiency of boiler?
An economizer captures heat from the flue gas that would typically go to waste, and utilizes it to preheat the feedwater. By doing this, an economizer is able to increase thermal efficiency by decreasing the energy required to heat the water to steam.
What happens economiser?
A common application of economizers in steam power plants is to capture the waste heat from boiler stack gases (flue gas) and transfer it to the boiler feedwater. This raises the temperature of the boiler feedwater, lowering the needed energy input, in turn reducing the firing rates needed for the rated boiler output.
Does boiler Mount economiser?
Mountings are water level indicator, safety valve, pressure gauge, etc. It may be noted that a boiler cannot function safely without the mountings. The boiler accessories are the devices, which form an integral part of a boiler but are not mounted on it. They include superheater, economiser, feed pump etc.
What do you mean by economiser?
Definitions of economiser. a frugal person who limits spending and avoids waste.
What is the function of economiser & fusible plug?
The function of fusible plug is to protect the boiler from damage due to overheating of boiler tubes by low water level.
What is the purpose of a economizer?
How economiser increases the efficiency of boiler?
Why the economiser and reheater is used in steam boilers?
Economizers transfer some of the heat on the smoke gases to the circulating water in their bodies and thus, provide recovery. The heat that recovered can given to boiler feed water or the water that used as the aim of heating, washing etc.
What is a boiler economizer?
Also, in a typical boiler system, 10% to 20% of energy input is lost in the form of heat escaping to the atmosphere. The installation of a boiler economizer helps to solve this problem. An economizer is a unit that captures heat from the stack, and then returns it to a water system.
What is the payback on a condensate economizer?
The lower the amount of condensate return, the higher the volume of make-up water and the higher savings potential. An economizer that recovers 5% of boiler input should easily have a 2 year payback in a year-round application. Web site: www.cainind.com
Is condensing harmful to the boiler or economizer?
CBW designs its feed water heaters with proper materials and a water removal system so that condensing is not harmful to the boiler system or economizer. Condensing is always avoided when heavy fuels are burned.
What is the flue gas temperature of a stack economizer?
Flue gases from large boilers are typically 450 – 650°F. Stack Economizers recover some of this heat for pre-heating water.