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Boiler servicing and why is it necessary

There are many reasons, so let us have a look at some of the main ones:

For many of us after our house and car our central heating system will be the third biggest single expendure. Our boiler is the most important part of our heating system. The manufacture of our boilers, like the manufactures of our cars, insist on servicing. The boilers will not do what they are designed to do which is to get the best possible heat from a quantity of fuel burned efficiently in a safe and controlled manner with minimal emissions from combustion and minimal ware and tare of component parts.

Combustion (in this case the burning of heating oil, hydrocarbons in oxygen)

This takes place when the oil comes in contact with oxygen at a temperature high enough for combustion to take place for diesel above 56c and for kerosene above 38c each kilogram of oil requires a precise quantity of air to burn completely, for oil boilers each kilogram of oil requires approximately 8.6 cubic meters of air to give 7.0 kilograms of combustion gases typically between 1100 and 1700 degrees centigrade this varies somewhat on the calorific value of the oil and boiler design. incorrect oil- air ratio causes. bad combustion. poor efficiencies. flame impingement. and pollution of the environment due to unnecessary production of the poisonous gases, sulphur dioxide, nitrous oxide and the killer carbon-monoxide.

Boiler main parts and their functions

1 Fire box

This is where combustion takes place the burner is fitted on to this box with an air tight seal. The box has a refractory lining the flame should not touch any surfaces of the box or the burner. When the flame does touch surfaces we get a common condition called flame impingment. Flame impingment can be caused by incorrect oil-air ratio, incorrect nozzle type fitted or blockage or even part blockage of nozzle by contaminates in fuel , dirty fuel oil filters, build up of soot on nozzle. incorrect oil ? air diffuser ( blast tube ) fitted or build up of soot on diffuser flame impingement on blast tube and nozzle will eventually cause over heating of burner and components parts resulting in burner failure and expansive repair bills. Flame impingment on fire box and bottom baffles surfaces will eventually burn firebox refractory lining and bottom baffles.

2 Boiler heat exchanger

This is where the heat from the hot gases of combustion are transferred to the water in your heating system. The water in your heating system passes through an arrangement of water passes which draw the heat from the hot combustion gases through the heat exchange surfaces there is also an arrangement of baffles usually steel in the spaces between the water passes these channel the combustion gases to the water passages surfaces increaseing the time it takes the combustion gases to travel through the heat exchanger to obtain the most suitable heat transfer rate for that boiler design the gases continue to the atmosphere through the flue arrangement. baffles may be arranged so there is small passes in to flue gas expansion areas. soot build up on heat exchanger surfaces, soot is a good insulator so the build up on heat exchanger surfaces reduces the heat transfer rate to the water resulting in a loss of heat up the flue to the atmosphere, more oil has to be burned to achieve the required temperature, end result poor efficiencies.

3 Burner

This is made up of many component parts each with its own particular function designed to work in conjunction with all the other components to supply the fuel, air, ignition and burning of oil with some built in safety precautions in place: electric motor / oil pump / air intake fan / control box / solenoid valves / transformer or electronic spark generator / high tension leads / electrodes / atomising nozzle / air diffuser, blast tube / photoresistor /

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Large Scale Infrastructure Changes Necessary to Meet Electric Vehicle Target

Media Information
18th February 2009

Electric Vehicle and Sustainable Transport Conference Opens in Dublin

Ireland can meet its target of making 10% of all road vehicles electric by 2020; however, significant large scale infrastructural changes will be required across the economy, including developing the capacity for recharging an estimated 250,000 passenger vehicles. This is according to Professor J Owen Lewis, Chief Executive, Sustainable Energy Ireland (SEI) speaking at the opening of this morning’s conference on Electric Vehicle and Sustainable Transport in Dublin. The conference is organised jointly by SEI and the ESB who today announced the introduction of a number of electric vehicles to the fleet operated by its networks business.

The conference is a platform for Ireland’s policy makers to consider the potential barriers to effective deployment of electric vehicles in Ireland in line with the Government’s ambitious 10% target. Delegates will hear from leading international experts who will speak on electric vehicle policy drivers and issues around research and development priorities, and examine sustainable transport technologies from a manufacturer’s perspective.

Professor J Owen Lewis said; “Interest in the use of electric vehicles is growing worldwide and Ireland is moving to prepare the way for this emerging form of transport by bringing together experts in the area to highlight the key issues which must be addressed. Ireland has a significant renewable energy potential in the form of wind and ocean energy. As these provide a variable supply of energy, with large amounts sometimes available at night time when our system demand is low, electric vehicles charging at night time will allow us to manage this renewable resource more effectively.”

ESB is committed to generating carbon-free electricity by 2035 and, in that context, argues that electricity can assist Ireland’s transport fleet to radically reduce its emissions. ESB’s Director of Sustainability, John Campion, said; “The electricity industry will play a vital role in reaching extremely challenging environmental targets in other sectors. The achievement of  carbon free electricity is the key to lowering harmful emissions in the transport sector. Not only will electricity be used to charge vehicles in an environmentally friendly way and reduce the dependence on fossil fuels, it can also be used to recharge vehicles at night and during periods of least demand.”

“The reason that a significant investment in infrastructure will be required to facilitate even a modest deployment of electric vehicles in Ireland is that these vehicles require an extensive charging infrastructure which is not currently in place. This infrastructure also needs to be integrated with a supply of renewable electricity. Today’s conference is examining the policy considerations necessary to facilitate the development of such an infrastructure. This will require a high level of cooperation between both public and private bodies as has been demonstrated in pilot projects undertaken in other territories,” added Professor Lewis.

According to SEI, passenger fleet owners in Ireland are best placed to initially benefit from the efficiencies of electric vehicles, which could reduce fuel running costs by up to 50%. Ownership costs over the life of the vehicle tend to be higher at present due to the capital costs; however it is expected that with increased production and technology development this cost can be quickly reduced.

Today’s event  also features a large display of electric vehicles of varying sizes available on the Irish market including cars, vans and all-electric people carriers. There is an increasing number of hybrid and electric vehicles for consumers and fleet owners to choose from, and the associated battery and charging technology is developing rapidly.

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People power – Minister Ryan announces incentives for micro-generation

Media Information
26th February, 2009

Energy Minister Eamon Ryan today announced measures to encourage the on-site generation of electricity in homes and farms across Ireland.

Among the measures is a guaranteed price of 19 cent per kilowatt hour of electricity produced. This competitive feed-in tariff will apply to the first 4,000 micro-generation installations countrywide over the next three years. Eligible installations include small scale wind, photovoltaic, hydro and combined heat and power.

Traditionally, the electricity network was designed to accommodate the flow of electricity from large centralised plants to customers dispersed throughout the country. Micro-generation at local level now introduces two-way flows to the electricity system. Local generators will have the ability to be paid by the ESB for electricity that is surplus to their own requirements and export it back to the national grid.

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