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Factors Affect Steam Boiler Efficiency

Date: 03-21-2017 Author: ailsa from ZG boiler

The goal of any boiler owner is to have their equipment performing as efficiently and reliably as possible. Efficiency for boilers can be measured three distinct ways: combustion efficiency, thermal efficiency and fuel-to-steam efficiency.

Combustion efficiency is a measure of the burner performance. The amount of excess air (or additional oxygen to ensure complete combustion), when combined with the stack temperature, can be plotted on an efficiency curve. In general, combustion efficiency will increase with a decrease in excess air and lower stack temperature, so optimal burner performance can be achieved. Recommended excess air levels are available in the burner manufacturer’s literature and should be maintained with periodic combustion analyzer testing.

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Thermal efficiency is an indicator of the ability of the boiler vessel to transfer heat from the combustion process to the water or steam in the boiler.   Thermal efficiency does not account for radiation and convection losses due to the boilers shell or other components (piping, water column, etc.).

Fuel-to-steam efficiency is most commonly referred to as “boiler efficiency.” It takes the radiation and convection losses into account and is a more involved test than the previous two. ASME Power Test Code PTC 4.1 has two methods for determining fuel-to-steam efficiency: the input-output method and the heat loss method. The input-output method is determined by the ratio of boiler Btu output divided by boiler Btu input multiplied by 100. This heat balance method determines the % efficiency by subtracting the stack, radiation and convection losses from 100.

The efficiency of a boiler is an important factor when selecting a boiler and it is critical that the values used when comparing boilers are on the same basis. Today, there are many options to help make boilers operate more efficiently including high turn down controls, oxygen trim, variable frequency drives and extended surface economizers. Contact a ZG Boiler sales representative today to discuss ZG Boiler’s Best Performance Standards (BPS) boilers, equipped with the latest efficiency upgrades to ensure the most efficient boiler operation.

Keyword: Industry steam boiler,Steam Boiler Efficiency

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We have over 70 years' experience of industrial steam boiler and autoclave, and we have a professional installation and after-sales staff for products.Take advantage of the most economical way to improve efficiency and operating flexibility, Get substantial savings on your fuel costs,Reduce all emissions for each K/W of electricity generated, including CO2.

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Industrial Steam Boiler Company Information--- ZG Boiler

Established:In 1945

Number of Employees:above 1500 People

Our products:industrial horizontal steam boiler and hot water boiler(biomass boiler, gas boiler, oil boiler, coal boiler, etc), CFB boiler, power plant boiler, waste heating recovery boiler, Pressure Vessel(AAC autoclave, Curing tank,etc )

Factory Size (Sq.meters):400,000 square meters

Factory Location:Factory 1: Zhengzhou,,Henan, China. Factory 2: Xingyang,Henan,China

Number of R&D Staff:376 people

Our Trade & Market

Export Percentage:30-40%

Total Annual Sales Volume:US$100 Million

Main Market:South America(Colombia, Venezuela, Guyana, Suriname, Ecuador, Peru, Brazil, Bolivia, Chile, Paraguay, Uruguay, Argentina and French Guiana), North America(Bahamas, Canada, Costa Rica, Cuba, El Salvador, Guatemala, Honduras, Haiti, Jamaica, Mexico, Nicaragua, Panama), Eastern Asia(Mongolia / Russia / North Korea / South Korea / Japan), Oceania(Australia, New Zealand, Fiji), Mid East(Bahrain, Egypt, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia, Syria, UAE and Yemen, Palestine, Algeria, Libya, Morocco, Tunisia and Sudan, Mauritania and Somalia), Africa(Egypt, Sudan, Libya, Tunisia, Algeria, Morocco, Ethiopia, Somalia, Kenya, Tanzania, Sierra Leone, Liberia, Cote d'Ivoire, Ghana, Togo, Niger, Nigeria, Cameroon, Gabon, Congo (Brazzaville), Zambia, Zimbabwe, Angola, Mozambique, Botswana, Namibia, South Africa), South Asia(Nepal, Bhutan, India, Pakistan, Bangladesh, Sri Lanka, Maldives) Southeast Asia(Vietnam, Laos, Cambodia, Thailand, Myanmar, Malaysia, Singapore, Indonesia, Brunei, the Philippines, East Timor) Domestic Market(China)

Source: http://www.zgsteamboiler.com/news/Factors-Affect-Steam-Boiler-Efficiency.html

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