ENERGY SAVING
Monitoring energy performance demo- project EPT
This article examines the performance of the energy saving measures on the farms participating in the EPT (Energetic Mushroom Growers) demo-project in The Netherlands and follows up the article published in February last year (MB75). What
have we learned from the measured data? By Jan Gielen, Delphy
O
ver the duration of the project, various energy saving measures and forms of renewable energy were used on the three farms
taking part, and their performance was monito- red. Monitoring of energy consumption took place at individual growing room level. The measurements were performed in one room then extrapolated to the actual size of the farm concer- ned. Electricity and gas consumption was also included in the comparison. This data was subsequently used to form an insight into the various components of the energy requirement of the climate unit to identify the most cost-effec- tive technology. The general sector data for 2013, taken from the annual Energy Monitor for the Dutch Mushroom Sector, was used as a reference.
Bercvenne bio-fermenter Natural gas
Annual consumption gas Calorifi c value gas
Annual calorifi c requirement Gas price
Annual costs (excl. VAT) Residual heat bio-fermenter
Annual production residual heat bio-fermenter Converted to gas saving
Remaining annual gas consumption Gas price
Annual costs (excl. VAT) Annual saving (excl. VAT) 32 MUSHROOM BUSINESS
Monitoring results Bercvenne BV Lierop
The Bercvenne mushroom farm comprises 14 growing rooms of 1276 m2 growing surface area. The mushrooms are harvested mechanically and grown in a four-week cycle. The rooms have individual climate units. The farm is part of AgriCollectief, a collective of two mushroom farms, a pig farm and a bio-fermenting unit. As well as pig manure, other biomass, purchased elsewhere, is fed into the bio-fermenter. Because of the unsuitability of spent mushroom compost for use in the bio-fermenter, it is disposed of conventionally. For this reason, a bio-fermenter is only a good solution in this specific situation with its collective of farms. The bio-fermenter is linked to a CHP (gas motor with generator) with
fossil fuel
442.131 m3/year 31,65 MJ/m3
13.993.446 MJ/year € 0,29 per m3
€ 127.286 yearly renewable energy
6.181.403 MJ/year 195.305 m3/year 246.826 m3/year € 0,29 per m3 € 71.059 yearly
€ 56.227 -44%
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