A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Regeneration of borehole fields using residential waste heat from ventilation and sewage
Ground-source heating systems in Finland face challenges in their long-term sustainability and feasibility in densely built urban environments. Enough space must be left between the boreholes used for heat collection to avoid premature cooling of the ground due to heat extraction. Ventilation heat recovery for preheating supply air is mandated in buildings, but much of this heat is lost during summer, when there is no need for heating. Sewage heat recovery on the other hand is not required at all. This simulation study examines how injecting residential waste heat into borehole fields can prevent the rapid temperature decline that follows from reducing the spacing between boreholes. Dynamic energy simulations were performed using IDA-ICE and TRNSYS. The results show that storing waste heat in the ground can sustain stable temperature levels in tightly spaced borehole fields indefinitely. This is especially important in large borehole fields meant to service a building cluster.
Regeneration of borehole fields using residential waste heat from ventilation and sewage
Ground-source heating systems in Finland face challenges in their long-term sustainability and feasibility in densely built urban environments. Enough space must be left between the boreholes used for heat collection to avoid premature cooling of the ground due to heat extraction. Ventilation heat recovery for preheating supply air is mandated in buildings, but much of this heat is lost during summer, when there is no need for heating. Sewage heat recovery on the other hand is not required at all. This simulation study examines how injecting residential waste heat into borehole fields can prevent the rapid temperature decline that follows from reducing the spacing between boreholes. Dynamic energy simulations were performed using IDA-ICE and TRNSYS. The results show that storing waste heat in the ground can sustain stable temperature levels in tightly spaced borehole fields indefinitely. This is especially important in large borehole fields meant to service a building cluster.
Regeneration of borehole fields using residential waste heat from ventilation and sewage
Janne Hirvonen (author) / Santeri Siren (author) / Piia Sormunen (author)
2025
Article (Journal)
Electronic Resource
Unknown
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