Case study

Hindon Organic Farm

60 kW log boiler

Key facts

Commissioned

September 2010.

Scheme

Supply of hot water and heating to Hindon Organic Farm Bed and Breakfast Business.

Boiler and Plant

60 kW ETA wood gasification boiler installed in a converted outbuilding with a 3,000 litre heat store.

Fuel

Approximately 30 tonnes of seasoned 50cm logs, producing 110,000 kWh of heat. Bulk roundwood is bought in, seasoned for 12 months, and then split by a contractor.

Grant / Funding

The owners received a 40% grant from the Bioenergy Capital Grants Scheme.

Savings / Investments

The previous oil heating system was generating bills of around £8,000 per annum. It is expected that the capital cost of the system will be repaid in about 3 years.

CO2 saving

Approximately 35 tonnes per annum.

Hindon Organic Farm includes an 18th century farmhouse, run as a thriving  nine bedroom bed and breakfast business.  Increasing oil costs and an ageing boiler persuaded the owners to install a 60kW log gasification boiler. The daily task of loading and lighting the boiler takes less than five minutes and existing farm buildings can accommodate a large store of seasoned logs.

Fuel supply and boiler loading

Bulk deliveries of roundwood are purchased as required from local forestry operators and stored on the farm so that they can season. When the desired moisture content has been achieved, a contractor is engaged to cut and split the logs to the required size. A year’s supply is easily processed in one day. Filling the boiler with wood and then lighting it takes around five minutes. Reloading occurs every two to three days in summer, and up to three times per day during the exceptionally harsh winter weather in December 2010.

Case study: Hindon Farm 01

System design and installation

The system was designed to provide 100% of the farm's heating and hot water requirement. Once lit, the log boiler burns all the fuel in the furnace, so a 3,000 litre accumulator tank was installed to store the resulting heat and allow distribution to radiators and a store of hot water over a prolonged period. Once the temperature of the accumulator tank falls below a certain level, the boiler is refilled and ignited. For occasions when no-one is available to refill the boiler, a modern condensing oil boiler was installed: however, to date, this support boiler has not been used.

Case study: Hindon Farm 02

Benefits

In addition to dramatically reducing the farm's heating bills, the project has further contributed to the ‘green’ image of Hindon Organic Farm.

Download Hindon Organic Farm Estate case study

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