Hoval Forester UFS wood chip boiler Outputs from180 to 2000 kw Working pressures to 4.5 bar

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1 Hoval Forester UFS wood chip boiler Outputs from80 to 2000 kw Working pressures to 4.5 bar March 20

2 Carbon friendly wood chip heating...built in Switzerland where ecology and very high efficiency have been a way of life for generations. Hoval Forester UFS Proven technology Designed to burn wood chip with up to 50% moisture content Compact construction with integrated multi cell cyclone Underfeed stoking system Automatic de-ashing Full control of both primary and secondary combustion air Automatic fire tube cleaning system Complementary plant available Commissioned by Hoval s dedicated Service Team

3 Renewable heat energy generation with the Hoval Forester UFS wood chip boiler The Hoval Forester UFS biomass boiler has been designed to run on virgin wood chip fuel an energy source that is becoming increasingly available to meet the growing demand for carbon neutral fuels. Seasoned - or partly dried timber - typically from managed sustainable woodland is shredded offsite into small evenly sized chips. The resulting fuel wood chips - can then be brought to site in bulk delivery vehicles and tipped into a purpose designed fuel store. The wood chip fuel is mechanically recovered from this store and fed into the boiler to burn and release its energy. The quality of the wood used is most important to the overall performance of the boiler equipment. The Forester UFS is designed to burn wood chip fuel with a moisture content of up to 50%. Wood chip fuel: Typically tipped into underground store Push feeder floor discharge Store discharge: Via hydraulic push (or pull) feeding floor system into cross conveyors Boiler Rotary discharge Fuel store: Rotary discharge system Controller: Optimised control and monitoring system with five control circuits. The interaction of these control circuits optimises the furnace values, guaranteeing a high degree of efficiency with low emissions Fuel feed: Depending on the nature of the material, by feed screw, double screw or scraper chain conveyor Underfeed stoker UFS: Compact boiler with underfeed gasification furnace, flue gas passes with turbulators and integrated flue gas cleaning Automatic de-ashing: Compact boiler construction with underfeed gasification furnace, flue gas passes with turbulators and integrated flue gas cleaning system. Central or seperate automatic de-ashing of grate and flue ash from the grate and multi-cyclone 3

4 Intelligent energy generation with the Hoval Forester UFS wood chip boiler Exhaust gas fan (optionally to right, left or at rear) Exhaust gas cleaning using multi-cell cyclone with automatic discharge of fine ash 3-pass heat exchanger Combustion chamber Container for fine cyclone ash Secondary air Fuel inlet via stoker feed screw Cast burner retort with primary air feed Front door with automatic pulse cleaning of the fire tubes Inspection doors to combustion chamber Ash container for grate ash Ash grate Automatic discharge of ash Pneumatic cleaning of the fire tubes Each fire tube within the heat exchanger is fitted with a compressed air nozzle mounted on the door at the front of the boiler. Short sequenced pulses of air help to clear any dust or ash particles that have settled on the heat exchanger surfaces to deliver optimum boiler efficiency, reducing the manual intervention required to run the boiler throughout the year. De-ashing The boilers can be arranged such that both grate ash and the fine particulate ash from the multi-cell cyclone set are collected in bins adjacent to the boiler. Depending on the boiler model this ash is either collected in individual bins or in a large common standard partitioned container mounted alongside the boiler. Assisted Ignition (optional) Fully automated ignition of the fuel within the boiler is achieved by utilising a hot air blower that fires for a short period on boiler start up. Once the fire is established the combustion process becomes self-sustaining allowing the ignition gun to be disengaged and the boiler to operate under normal modulation. Only suitable for use with wood chip fuel with a moisture content of up to 35% 4

5 Hoval Forester UFS Technical Data Model Nominal output kw Indicative Full Load (Nominal Output) Efficiency ncv % Indicative Part Load Efficiency ncv % Flue Gas Temperature Nominal Output C Flue Gas Temperature Min. Output C Flue Gas Mass Flow at 9% O 2 Nm 3 /h Maximum Boiler Operating Temperature C Minimum Boiler Return Temperature C Indicative Fuel Consumption () m 3 /h Boiler water content litres Dry Weight (without stoker fitted) kg Flue Connection ID mm Min Buoyancy Required at Flue Outlet Pa Electrical Supply ph/v/hz 3/400/50 3/400/50 3/400/50 3/400/50 3/400/50 3/400/50 3/400/50 3/400/50 3/400/50 3/400/50 3/400/50 Standard UFS Boiler has a maximum working pressure of 4.5 bar g and a design pressure of 5.0 bar g. Higher operating pressures and temperature available on request. () Indicative fuel consumption at nominal boiler output is based upon a standard G50 grade wood chip of 35% relative moisture content, processed from a coniferous wood species (average calorific value of 0.5 MWh/m 3 ). Actual values will vary depending on the wood species used, chip grade and moisture content Indicative Effect of Moisture Content on the Calorific Value of Wood Fuel ncv kwh/kg % Moisture Content of Wood Chip Fuel Fuel Quality For consistent and reliable boiler performance, sourcing the correct quality wood chip fuel is vital. As the above graph shows, the moisture content of the wood has a marked influence on the overall energy available for the boiler. In addition, the wood chips should be evenly sized and free from foreign material (eg sand, soil etc) and not contaminated with stones, nails, metal fixings or other debris. 5

6 Hoval Forester UFS Dimensions & Technical Information kw (seperate ash collection) Flue outlet connection E A 9 B Rear view 4 2 I H Retort L BIN F G 8 C D 0 Key Flow connection (left or right) Multi-cell cyclone 2 Return (left or right) 7 Grate ash bin 50L (or 240L bin available) 3 Fuel delivery auger 8 Cyclone fine ash discharge bin (50L) 4 ID fan 9 *Automatic heat exchanger cleaning arrangement 5 FD fan 0 Grate ash conveyor motor Please note that a safety valve must be fitted on the flow pipework from the boiler before any isolating valve * A compressed air supply is required for the automatic heat exchanger cleaning arrangement Dimensions Model kw A B C D E F G H I Typical ash in 24h at 00% output L L L L L L Flow Connection Detail Thermal safety overload heat exchanger A B C D Stat pockets Return Dimensions Inlet should be connected to a cold water mains supply. Drain pipework (by others) to be run from the outlet connection via a tundish to drain. Model kw A B C D Connections DN Model kw A B C D Connections DN Note: The boiler connection size is the same for the flow and return for each model, as above

7 Hoval Forester UFS Dimensions & Technical Information kw (central ash collection) Flue outlet connection 4 E A 8 00 litre 800 litre Front view B 8 9b 5 9c 4 C F 3 G D 9 Key 9c 9a 7 Flow connection (left or right) - refer to previous page for detail *Large partitioned ash container (for both grate & fine cyclone ash) 2 Return connection (not shown on diagram) behind large ash container 7 Inspection door to combustion chamber 3 Fuel delivery auger 8 Automatic heat exchanger cleaning arrangement 4 ID fan 9 Ash conveying system 5 Multi cell cyclone Please note that a safety valve must be fitted on the flow pipework from the boiler before any isolating valve. * Diagram shown with ash bin on left, if right handed configuration required then corresponding dimensions as shown for left configuration need to be allowed for. A compressed air supply is required for the automatic heat exchanger cleaning arrangement Dimensions Model kw A B C D E F G 9a 9b 9c Typical ash in 24h at 00% output Ø00 Ø00 Ø50 4L Ø00 Ø00 Ø50 9L Ø00 Ø00 Ø50 24L Ø00 Ø00 Ø50 29L Ø00 Ø00 Ø50 3L Ø00 Ø00 Ø50 44L Ø50 Ø50 Ø50 5L Ø50 Ø50 Ø50 72L Ø50 Ø50 Ø50 9L Ø50 Ø50 Ø50 44L Ø50 Ø50 Ø50 92L 7

8 Other associated products Complimentary boilers and solar equipment UltraGas pre-mix condensing boiler: The UltraGas output range is based on twenty one nominal burner sizes ranging from 5 to 000 kw. Twin models are available ranging from 250 to 2000 kw The UltraGas boiler features the Hoval UltraClean combustion system with down firing pre-mix burner. This advanced burner enables the boiler to achieve efficiencies of up to 09.9% net, with averaged NOx levels less than 40 mg/kwh and CO as low as 3 mg/kwh. Hoval Ltd Northgate Newark Notts NG24 JN Tel: (03) 727 Fax: (03) boilersales@hoval.co.uk CompactGas: The Hoval CompactGas is a welded steel LTHW boiler designed and manufactured to fully comply with European code requirements and is fully CE marked. The powerful performance range of its model series extends from 000 to 2800 kw, making it suitable for many large installations. STU BioLyt UltraGas High efficiency wood High efficiency wood Gas condensing boiler. pellet burning The boiler. Hoval CF Biomass pellet burning filter: boiler. The Hoval CF Biomass Filter is a bespoke engineered Output: air Output: filtration device Output: designed to remove air borne Single particles to from double units: 00kW - 200kWthe combustion 50kW gases and of biomass 70kW heating boilers The 440kW unit is skid mounted and includes an integral induced draught fan sized to suit the range of Hoval biomass boilers. The filtration process removes up to 9% of air borne PM2.5 / PM0 combustion particulates and cleans the flue gases regardless of load or degradation of fuel quality. Hoval Service: For specialist commissioning, maintenance and repair of your Hoval appliances, contact our in-house Service and Spare Parts Department. This is your guarantee for economical operation, reliability and value for money. July 20 By Appointment to Her Majesty the Queen Boiler Manufacturers & Engineers Hoval Ltd Newark. Responsibility for energy and environment Hoval follows a policy of continued improvement and reserves the right to change specifications without notice.