Voske GTE with heat pump and balance control GTE sources with heat pump and balance control
Energy production cold source (*sector data energy monitoring report 2013) Total energy production cold source (13*250 m2)
Saving cold source on cooling energy via heat pump (COP 5.5) Energy production heat source (*sector data energy monitoring report 2013)
Total energy production heat source (13*250 m2) Saving heat source on heating energy via heat pump (COP 4.5) Old gas consumption
Share of heating (50 % old gas consumption) with high-effi ciency boiler Calorifi c value share of heating (31.65 MJ/m3) Share of heating in kWh-th (3.6 MJ = 1 kWh-th) Share of heating via heat pump in kWh-e (COP 4.5)
Saving heat source on heating energy via heat pump (COP 4.5) Electricity requirement heat pump for additional heating (COP 4.5)
New gas consumption (50 % gas consumption for heating no longer applies) Old electricity consumption
Share of cooling (50 % old electricity consumption) with cooling unit (COP 3.5) Share of cooling via heat pump (COP 5.5)
Saving cold source on cooling energy via heat pump (COP 5.5) Electricity requirement heat pump for additional cooling (COP 5.5)
Summary electricity consumption new situation Electricity requirement heat pump for additional heating (COP 4.5) Electricity requirement heat pump for additional cooling (COP 5.5)
Other GTE electricity requirements (pumps, resistance etc. / 16.3 kWh-e/m2/year) Other electricity requirements (fans, lighting etc. / 50 % old electricity consumption) New electricity consumption
Savings on electricity (7%) Savings on gas (50 %)
Total saving GTE with heat pump and balance control (excl. VAT) 59 kWh-th/m2/year
191.750 kWh-th/year 34.864 kWh-e/year
74,2 kWh-th/m2/ year
241.150 kWh-th/year 53.589 kWh-e/year
95.000 m3/year 47.500 m3/year 1.503.375 MJ/year
417.604 kWh-th/year 92.801 kWh-e/year -53.589 kWh-e/year 39.212 kWh-e/year
47.500 m3/year
500.000 kWh-e/year 250.000 kWh-e/year 159.091 kWh-e/year -34.864 kWh-e/year 124.227 kWh-e/year
39.212 kWh-e/year 124.227 kWh-e/year 52.924 kWh-e/year 250.000 kWh-e/year 466.363 kWh-e/year
Price
33.637 kWh-e/year € 0,11 € 3.700 47.500 m3/year
€ 0,45 € 21.375 € 25.075
indicated above, the innovative burner is still being developed, so the absorption refrigerator cannot yet be included in the results shown below. Some of the figures shown have there- fore been calculated/ based on substantiated assumptions.
With correctly dimensioned geothermal energy storage with a heat pump and absorption refrigerator, the requirement for heating can be satisfied from the geothermal source, supple- mented by the heat pump. This will save roughly 50% on gas consumption. Additional heating provided by the heat pump consumes extra electricity. Energy is also consumed by the pumps on the geothermal energy storage installation, the additional resistance of the coils in the central duct installation etc. On the other hand, the cooling capacity is lower as part of the cooling requirement can be provided by the cold source. In addition, a heat pump has a
higher COP (efficiency) for cooling, so less energy is required here too. In total, combining use of geothermal energy with a heat pump and absorption refrigerator can lead to 7% lower energy consumption that if an ordinary cooling unit is used. In summary: savings of 50% on gas consumption and approximately 7% on electri- city consumption.
Conclusion
The data gathered from the farms reveals that there are plenty of energy and cost-saving options available. As well as applying energy-saving technology, there are also ways of generating a significant output of renewable energy on-farm in order to reduce costs. Generating renewable energy demands integral solutions whereby the energy requirement and energy production should be correctly balanced and energy should be buffered, where possible, for later use.
MUSHROOM BUSINESS 35
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