6. A building needs 30 [MWh] electricity annually for appliances, and its annual cooling demand is 40 [MWh]. The building is connected to a cooling grid (neglect the losses in the grid), where the cold is produced by an absorption cooling machine using waste heat from the power plant delivering the electricity to the building. What is the amount of primary energy used annually by the building? The power plant is combustion engine based and has an electrical efficiency of 0.35, a thermal efficiency of 0.55 and the absorption cooling machine has a SEER of 0.9. (multiple choice, one answer)

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6. A building needs 30 [MWh] electricity annually for appliances, and its annual cooling demand is 40 [MWh].
The building is connected to a cooling grid (neglect the losses in the grid), where the cold is produced by an
absorption cooling machine using waste heat from the power plant delivering the electricity to the building.
What is the amount of primary energy used annually by the building? The power plant is combustion engine
based and has an electrical efficiency of 0.35, a thermal efficiency of 0.55 and the absorption cooling machine
has a SEER of 0.9. (multiple choice, one answer)
25 [MWh]
57 [MWh]
63 [MWh]
86 [MWh]
177 [MWh]
Transcribed Image Text:6. A building needs 30 [MWh] electricity annually for appliances, and its annual cooling demand is 40 [MWh]. The building is connected to a cooling grid (neglect the losses in the grid), where the cold is produced by an absorption cooling machine using waste heat from the power plant delivering the electricity to the building. What is the amount of primary energy used annually by the building? The power plant is combustion engine based and has an electrical efficiency of 0.35, a thermal efficiency of 0.55 and the absorption cooling machine has a SEER of 0.9. (multiple choice, one answer) 25 [MWh] 57 [MWh] 63 [MWh] 86 [MWh] 177 [MWh]
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