Plasma TV vs LCD TV

Written by ian tham

For those seeking to buy their first flat panel  TV display device, it is easy to be confused with conflicting and counter claims by different interest parties. So what isrepparttar truth inrepparttar 150175 competition between LCD and Plasma TV? Here's are some pointers before you rush out and buy your flat panel TV on impulse . Just consider and keep them in mind when choosing.


Actually, both types of technologies have their pros and cons. Let's start with various factors.


Picture Quality

Plasma TVs have better contrast ratios and show better blacks than an LCD TV. That means in a dark scene, you are able to see images more clearly defined. This is because in LCD technology, liquid crystals are unable to shut off allrepparttar 150176 light completely due torepparttar 150177 presence ofrepparttar 150178 backlight resulting in light leakage and therefore it is impossible to get absolute black.

I understand plasma TVs are able to produce  better color saturation than LCD TVs. Generally,repparttar 150179 native resolution of LCD TVs are higher than that of plasma TVs so you may get greater details when watching your  programs especially in high definition video sources. 


Screen Size

If you looking for a really big screen, then you have to go for plasma TV as they are available in sizes up to 60 inches. LCD TV onrepparttar 150180 hand come in maximum sizes of up to 40 inches. If you compare prices on both technologies forrepparttar 150181 same screen size, you will also realise LCD TVs are more expensive.


Life span

Methods of Improving Boiler Efficiency

Written by Thomas Yoon

Withrepparttar rising cost of fuel prices, industries that use steam boilers for heating or power generation are hard pressed to operate at peak efficiencies.

While steam consumption, leakages, and other heat transmission losses can contribute torepparttar 150058 overall energy bill, this article focuses onrepparttar 150059 heart ofrepparttar 150060 steam generator -repparttar 150061 boiler.

Controllingrepparttar 150062 boiler is of utmost importance in any steam generation energy saving program. Below are some ways to improve boiler efficiencies:

1. Reducing excess air 2. Installing economizer 3. Reducing scale and deposits 4. Reducing blow down 5. Recovering waste heat from blow down 6. Stopping dynamic operation 7. Reducing boiler pressure 8. Operating at peak efficiency 9. Preheating combustion air 10.Switching from steam to air atomization 11.Switching to lower cost fuel

Reducing Excess Air

By farrepparttar 150063 most common reason for energy inefficiencies in a boiler can be attributed torepparttar 150064 use of excess air during combustion atrepparttar 150065 burners. When there is more air than is required for combustion,repparttar 150066 extra air becomes heated up and is finally discharged out torepparttar 150067 atmosphere. However, there are reasons for putting in some extra air for combustion - to compensate for imperfect burner fuel-air mixing conditions, air density changes, control system "slop", burner maintenance, fuel composition and viscosity variation, and imperfect atomizing steam or air controls for burners.

Adjustingrepparttar 150068 fuel-air ratio for combustion can be quite tricky. Ifrepparttar 150069 fuel is too much as compared torepparttar 150070 air, incomplete combustion occurs. This will give rise to carbon soot deposits insiderepparttar 150071 combustion chamber or even overrepparttar 150072 boiler tubes.

The consequences of having soot deposits overrepparttar 150073 heat transfer surfaces andrepparttar 150074 potential of having explosive flue gases inside repparttar 150075 boiler are much worst than losing a slight amount of energy throughrepparttar 150076 exhaust stack. Therefore, many boiler operators choose to adjust their burners to be slightly on excess air.

Installing Economizer

This is only appropriate if there are insufficient heat transfer surfaces inrepparttar 150077 boiler. The economizer tubes may contain either circulating boiler water or circulating feed water. Becauserepparttar 150078 temperature ofrepparttar 150079 exhaust gases can be quite high,repparttar 150080 economizer tubes may be fitted with safety valves to avoid over-pressure damage. Also temperature control of feed water is required to prevent pump airlock. To avoid corrosion, careful design is needed to ensure thatrepparttar 150081 exhaust flue gas temperature does not drop belowrepparttar 150082 dew point.

Reducing Scale and Deposits

For any boiler operation, this is a must. The safety ofrepparttar 150083 boiler is at stake. Any scale or deposits will lead to reduced heat transfer that will eventually lead to overheating, reduction of mechanical strength ofrepparttar 150084 steel and finally to bursting.

This should already be inrepparttar 150085 normal daily procedure of boiler operation.

Reducing Blow down

Blow down of boiler water is discharging hot water intorepparttar 150086 drains. However, blow down is necessary to maintainrepparttar 150087 boiler water concentration of dissolved solids that are necessary for conditioningrepparttar 150088 boiler water. The dissolved solids are necessary for preventing boiler corrosion and scaling.

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