Energy Efficient Retrofitting Design
Enviroeye, acting as M&E consultants on design and energy efficiency are keen protagonists of Combined Heating and Power (CHP) and this led to Edina’s involvement with the project.
Kilbush Nurseries produces over 1,000 tonnes of tomatoes each year. Its facilities encompass over two hectares of tomatoes under glass, in state of the art commercial greenhouse units, with integrated packing and transportation facilities. Kilbush has always striven for excellence as much in the production of its food as well as the end result and supplies high quality tomatoes to the most stringent standards set by Marks and Spencer and other reputed grocers. Varieties grown include Elegance tomatoes on the vine, Sunstream and Cocktail tomatoes.
The new system provides heat and CO2 to the greenhouse, while supplying electricity to Keelings’ site loads and exporting surplus to the national grid. This will help mitigate some of the effects of high energy and carbon tax tariffs for Keelings and provide a reliable source of energy to local homes and businesses.
The provision of energy for its operations is one of the highest overheads for producers. Studies have shown that this tends to be the third greatest expense following labour and the initial cost of plants. Following the installation of natural gas CHP, these costs are offset dramatically by the advantages in heating, lighting and export to the grid all integral in the CHP system.
The system consists of a 2 MWe MWM TCG 2020 V20 gas engine with advanced exhaust gas cleaning system and TEM engine management system. Keelings’ growing season now extends from May to December.
Electrical efficiency for the engine is put at 43.7%, with extremely low emissions, says MWM. In fact, emissions are so clean that it is considered safe for operatives to continue working in the greenhouse while CO2 is added. The 1,200 – 2,000 kWe output range TCG 2020 is said to offer the ‘best electrical and thermal efficiency in its output class’ and will run on all gas types, such as natural gas, biogas, landfill gas, sewage gas, mine gas, etc.
Mainly used for CHP plants in Europe and for biogas applications worldwide, the TCG 2020K has been especially adapted to non-ISO conditions such as high altitudes or high intake air temperatures in the field of natural gas. There are more than 2,000 of these power generators with approximately 2,800,000kWe already installed around the globe. The new Keelings plant in Ireland is being maintained and serviced by Edina’s Dublin service team, based in Dublin, already responsible for 60 MW within Ireland, and for 210MW of power generation across the UK.
These systems have many tangible benefits as highlighted above, not least the continued competitive edge of the growers who have worked so hard for their leading position in the economy and reputation of the business and Ireland as quality food producers.
Achieved outcome includes:
Combined Heating and Power (CHP)
Winner of Innovation Award 2014 Sustainable Ireland Awards
Shortlisted for the ADE (Association for Decentralised Energy) 2017 Innovation Award of the Decade
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