START A PETITION 25,136,189 members: the world's largest community for good
START A PETITION
x
May 7, 2013

Energy conservation in Boilers | Energy is an indispensable resource that is required to run the economy and sustain the well being of people. Every day new discoveries are made to improve efficiency of the methods of power generation and transmission. After all, energy conservation must be our social responsibility.

Social responsibilities for exploring, harnessing, adopting the given energy sources to obtain effective means to consume those are no less important. The rapidly developing economies of Third World countries like India, China need to generate increasing amounts of energy as they grow. Energy shortages with rising cost confront every nation, especially those aspiring for industrial development. A time has come when no resource of this planet, including energy, should be used wastefully. To achieve this ideal, the society as a whole would require collective efforts of all groups, especially between the organizations harnessing energy and the consumers of energy. And both must understand the underlying principles of energy generation and energy consumption.

Every day new discoveries are made to improve efficiency of the methods of power generation and transmission. Some of the discoveries would fail to attract the users while some may be rejected or replaced by new claims. Such a circumstance would demand repeated explorations of energy opportunities and the way social responses can facilitate the use of new discoveries.

Energy Conservation Opportunities | The various energy efficiency opportunities in boiler system can be related to combustion, heat transfer, avoidable losses, high auxiliary power consumption, water quality and blowdown. Flue gases are the single most important cause of energy loss. As much as 18 to 22 percent of available energy goes up the chimney. Heat radiation and convection from boiler walls raise heat loss another 1 to 4 percent. Examining the following factors can indicate if a boiler is being run to maximize its efficiency:

1. Stack Temperature >> The stack temperature should be as low as possible. However, it should not be so low that water vapor in the exhaust condenses on the stack walls. This is important in fuels containing signficant sulphur as low temperature can lead to sulphur dew point corrosion. Stack o temperatures greater than 200 C indicates potential for recovery of waste heat. It also indicate the scaling of heat transfer/recovery equipment and hence the urgency of taking an early shut down for water / flue side cleaning.

2. Feed Water Preheating using Economiser >> Typically, the flue gases leaving a modern 3-pass shell o boiler are at temperatures of 200 to 300 C. Thus, there is a potential to recover heat from these gases. The flue gas exit temperature from a boiler is usually maintained at a o minimum of 200 C, so that the sulphur oxides in the flue gas do not condense and cause corrosion in heat transfer surfaces. When a clean fuel such as natural gas, LPG or gas oil is used, the economy of heat recovery must be worked out, as the flue gas temperature may be well o below 200 C.

3. Combustion Air Preheat >> Combustion air preheating is an alternative to feed water heating. In order to improve thermal efficiency by 1%, o the combustion air temperature must be raised by 20 C. Most gas and oil burners used in a boiler plant are not designed for high air preheat temperatures. Modern burners can withstand much higher combustion air preheat, so it is possible to consider such units as heat exchangers in the exit flue as an alternative to an economizer, when either space or a high feed water return temperature make it viable.

4. Incomplete Combustion >> Incomplete combustion can arise from a shortage of air or surplus of fuel or poor distribution of fuel. It is usually obvious from the colour or smoke, and must be corrected immediately. In the case of oil and gas fired systems, CO or smoke (for oil fired systems only) with normal or high excess air indicates burner system problems. A more frequent cause of incomplete combustion is the poor mixing of fuel and air at the burner. Poor oil fires can result from improper viscosity, worn tips, carbonization on tips and deterioration of diffusers or spinner plates.

5. Excess Air Control >> Excess air is required in all practical cases to ensure complete combustion, to allow for the normal variations in combustion and to ensure satisfactory stack conditions for some fuels. The optimum excess air level for maximum boiler efficiency occurs when the sum of the losses due to incomplete combustion and loss due to heat in flue gases is minimum. This level varies with furnace design, type of burner, fuel and process variables. It can be determined by conducting tests with different air fuel ratios….see complete article

Visibility: Everyone
Posted: Tuesday May 7, 2013, 10:26 pm
Tags: crown capital news environmental management eco [add/edit tags]

Group Discussions
Comments
Or, log in with your
Facebook account:

Author

Fearl H.
female ,
USA
FEARL'S SHARES
Aug
1
(0 comments  |  discussions )
\nWith no conservative candidates | BELLINGHAM TheNewsTribune - A candidate forum on growth and the environment was canceled because none of the four conservative Whatcom County Council hopefuls were going to participate. The organizers, RE Sources for...
Jul
8
(0 comments  |  discussions )
\n“The possible presidential-type contest between the two emerging personalities will make it worse for the Congress. The possibility of one of the two major parties forging way ahead appears real. And this time it won’t be the Congress&rdq...
Apr
16
(0 comments  |  discussions )
\n\r\nJanus Janea - works with government bodies, international entities, private sectors and other non-governmental organizations in providing extensive information to the public…\r\nWarmer Climate causes Greener Arctic>>Researcher say, elev...


SHARES FROM FEARL'S NETWORK
No shares


MORE MEMBER BLOGS
Mar 31
Blog: How to Extend the Life of your TRIAD Boilers by Kayleigh L.
(0 comments  |  discussions ) — \\nHow to Extend the Life of your TRIAD Boilers \\r\\n \\r\\nCorlis Engine Review\\r\\nEvery user desires to prolong the life of a unit. TRIAD assists their clients in achieving this important objective by informing them of ways they can avoid problems... more
Feb 27
Blog: Dr Oz Weight Loss - The 100% Natural And Very Efficient Diet Pill by Debra S.
(0 comments  |  discussions ) — \\nYes, Dr. Oz called Garcinia Cambogia Extract (HCA) the Holy Grail of Weight Loss. He went on to say, “Anytime I see a scientist get this excited about something like Garcinia Cambogia Extract and when I looked through some of this research and... more
Blog: My Favorite Websites by krysta I.
(0 comments  |  discussions ) — \\nIFAW: www.ifaw.org\\r\\nOCEANA www.oceana.org\\r\\nPETA: www.peta.org\\r\\nEARTH 911: www.earth911.org\\r\\nANI MALs ASIA: www.animalsasia.org\\r\\n \\r\\n\\r\\n\\n more
Feb 21
Blog: testing one two three by Geoff M.
(0 comments  |  discussions ) — hello world more
Blog: Garcinia Cambogia Reviews From Actual People Garcinia Pure Extract Is A Huge Success February 20 by Dany M.
(0 comments  |  0 discussions ) — \\nGarcinia Cambogia Reviews From Actual People Garcinia Pure Extract Is A Huge Success February 20\\r\\nGarcinia Cambogia System The Dr. Oz Lose Weight Quick Process Without Having Side Effects\\r\\nHe went on to say, “At any time I see a researcher... more
 
Content and comments expressed here are the opinions of Care2 users and not necessarily that of Care2.com or its affiliates.