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Moor Heating. Stephen Larkin The experience of having the first pellet boiler. The experience of having the first pellet boiler. Reasons for choosing a pellet boiler. Running cost calculation The installation Pellet delivery Living with a biomass boiler – the first two weeks. - PowerPoint PPT Presentation


  • Moor HeatingStephen LarkinThe experience of having the first pellet boiler

  • The experience of having the first pellet boilerReasons for choosing a pellet boiler. Running cost calculationThe installationPellet deliveryLiving with a biomass boiler the first two weeks.

  • Reasons for choosing a pellet boilerLPG boiler more than 20 years old and becoming unreliable. Stopped working December 2012

    LPG expensiveCosts likely to rise Not easy to track use

    Aim to reduce CO2 outputChange to sustainable energyPellets more convenient and efficient than other biomass systems

  • Annual Running cost

    Heat load of building with hot water19 880 kWhProportion supplied by biofuels100 %Boiler efficiency92 % or 0.92Heating system efficiency factor 1 . Boiler efficiency1.086Energy required from pellets21 590 kWhNet energy content of pellets4.8 kWh / kgEstimated pellet requirement4 500 kg or 4.5 tonnesFuel cost with pellets at 260 per tonne (including VAT & delivery)1,170

  • Annual LPG Running cost

    Heat load of building with hot water19 880 kWhProportion supplied by LPG100 %Boiler efficiency80 % or 0.80Heating system efficiency factor 1 . Boiler efficiency1.25Energy required from LPG (propane)24 850 kWhEnergy content of 47 kg propane667.3 kWhEstimated number of gas cylinders37.2Fuel cost with LPG at 60 a cylinder2,232

  • Price comparison


  • Price comparison 1 cylinder 14 bags of pellets 6036.40

  • Pre-Installation

  • Installation

  • Installation

  • Installation

  • Installation

  • Installation

  • Installation

  • Installation

  • InstallationStart Tuesday 15 Jan

    Boiler firing Thursday 24 Jan

  • Installation

  • Pellet Delivery

  • Pellet Delivery

  • Living with a biomass boilerThe First two weeks

  • Living with a biomass boilerThe First two weeks

  • Living with a biomass boilerThe First two weeks

  • Living with a biomass boilerSystem design

  • The experience of having the first pellet boilerA warm home. Plenty of hot waterRenewable Heat Incentive payments to come

    *The MCZ RED Compact 24 boiler

    *Thought of having boiler in kitchen but opted for garage with space for a hopper and pellet storage.Pellets transported a minimum distance at delivery.Quote from Solarwall gives total heat load for building including hot water.Calculation is set out in a standard way and is not easy to follow.Net energy content of fuels is the appropriate measure when the latent heat of vaporisation of the water content is not recovered by condensation.260 per tonne is a realistic figure for pellets (see second presentation)*Calculation of costs of providing same heat load with fuel used before pellets. Could also use for comparison with fuel costs for any alternative or could do a reverse calculation to find energy value of fuel used in recent years. Boiler efficiency is available from the SEDBUK database at typical calorific value of other fuels and typical costs see the Facts and Figures pages at information on trends in energy prices available from See also the link from that page to a .pdf file Energy Price Trends. This includes some information on recent changes in pellet prices.

    *Service prices based on local gas boiler serviceman in Danby area and Solarwall price for pellet boiler.**Survey carried out in December 2012 and quote provided before ChristmasVisit to the Energy Centre to see a biomass boiler in the first week of January.*The boiler arrives in January following overnight snow.*We thought the boiler would go in left back corner of garage below the old one in the kitchen. The final plan was different.It is worth discussing with the installer the floor plan for boiler and hopper (if chosen). Allow sufficient space behind boiler for access for service and think about location for pellet storage.*Drilling the hole for the flue. Garage ceiling is a bit above ground level at side of house.*Plumbing in progress on the back wall of the garage and fiixng of brackets for the flue on a cold day.*Flue as seen from inside the garage and externally. The need to take flue up to near ceiling before going through the garage wall required non-standard flue sections. There was a delay in delivery possibly caused by the snow. Solarwall will now hold more flue parts in stock and more fully consider the parts that are required before future installations commence.*The MCZ RED Compact 24 boilerThe inside of the 70 kg pellet hopper in the top of the boiler.Tipping one 10 kg bag of pellets into hopper.*Took 8 working days because of weather and delays in obtaining flue parts.A typical installation should be not more than 5 days.*Consider the layout of the boiler, hopper and where you will store your pellets. Plenty of space behind the boiler is useful to allow for servicing. The 200 kg hopper comes with an auger to feed pellets into the 70 kg boiler hopper. This is equipped with two sensors to detect pellet level and to control the auger.*Google Earth incorrectly labels our house as a Post Office. Access is up a track from two roads. The track is steep at both ends and has a poor surface.Delivery with a 7.5 tonne vehicle was requested but this was not made on the day pellets arrived in the depot in Middlesbrough because of snow. The driver confirmed the 7.5 tonne vehicle has been used for deliveries to Stonehouse caf so future deliveries could be made to our drive. The Solarwall installers helped with the pellet handling.*Have a pallet or two ready to receive pellets. The wheelbarrow was useless in the snow.Stack of 960 kg of pellets. Arrives on a 1m x 1.2 m pallet.*Programmer on kitchen wall and wirless thermostat and programmer that can be moved to any room in the house.*The hopper must be positioned to the left of the boiler because of the position of a removable plate in the rear left corner or the boiler top. This is removed to fit the tube from the end of the auger.Bags of pellets can easily be placed on a wire mesh and slit along their length.The hopper lid should fold back onto the top of the rear half of the hopper. This cannot happen in our installation because it hits the ceiling. This does not prevent pellet loading but a clip to hold the lid up will be useful. *Boiler door open and ash pan removed. Less than half full after two weeks of burning. The ash is rich in potash so useful as a garden fertiliser.*Biomass boilers produce more heat than gas or oil boilers and this must be removed when the boiler shuts down.The current system design incorporates a dump radiator (also known as heat bleed or heat leak radiator). This could be replaced with a heated bathroom towel rail. The disadvantage is the dump radiator or towel rail is on all of the time when the boiler is on for central heating or hot water, not just at shut down. Solarwall are investigating an alternative system design with a different type of valve. It will be important for future customers to discuss with the installer the proposed approach to this problem.

    A solution is to use a thermal store (buffer store). This is a very well insulated tank a bit bigger than the normal domestic hot water cylinder. Heat goes into it from the pellet boiler (and any other available inputs such as thermal solar panels) then is drawn from the tank for central heating and hot water. This may be a sensible option for some people but it involves extra cost and needs space so is not ideal for all.**