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Title Making grid capacity available through heat pump control
Publication Date
Discipline/Department Engineering Sciences
University/Publisher Uppsala University
Abstract In this report the problem of constructing a bus depot with electrical buses despite the lack of grid capacity, was analyzed. A potential solution is investigated, namely smart control of heat pumps in industries. The possibility of allocating grid capacity to the bus depot by reducing power consumption in heat pumps during peak hours, is taken into consideration. The maximum amount of released capacity in an industrial area is calculated through the controlling of heat pumps. This investigation was made through simulations with a simplified building energy model (lumped capacity model) which was applied to a reference building. After mapping the area Boländerna and the geothermal wells located there, IKEA Uppsala was chosen as the reference building, since a third of the total number of wells were found in that area. To take the whole capacity of Boländerna into account, the model was scaled up to estimate the total, possible reduction of power. The bus depot requires 6 MW nighttime and 4 MW daytime, the total amount of electrical power that could be withdrawn, if all heat pumps were on maximum heat, in the chosen area were 0.75 MW and by controlling the heat pumps during an optimized level, the amount of 142 kW could be made available to the electric grid. 142 kW is not enough cover the need for the bus depot but it could supply the need for a slow charger to one of the buses and is therefore a possible sub-solution to the larger problem.
Subjects/Keywords Grid; capacity; electricity; Uppsala; IKEA; peak shaving; electric bus; bus depot; lumped capacity model; Region Uppsala; Energy Systems; Energisystem
Language en
Country of Publication se
Record ID oai:DiVA.org:uu-384182
Repository diva
Date Indexed 2020-01-03

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…discussion and future research. 6.1 Theoretical discussion Region Uppsala has a clear goal with this project, to find ways to optimate the electric grid in order to make electric power available to their bus depot. This needs to be done in order to fulfill…

…if just looking at the limited area in Bolnderna and using the optimized level, the highest amount of released electrical power is not large enough to reach the goal set by Region Uppsala. Neither could any of the other levels release enough capacity…

…most probable case to implement in actual estates, is the one that spans over the shortest time, ergo the optimized level. 6.3 Future research Region Uppsala have even more futuristic goals of expanding the bus depot to a number of 180 buses, a plan…

…and solutions. In order to expand the amount of released grid capacity and to improve the model, several adjustments could be made. Region Uppsala could, for example, expand the limited area from Bolnderna to include a wider area of Uppsala and their…

…pumps connected to a total depth of 62.5 km is 0.75 MW. This means, that even theoretically, it is not possible to make enough electric power available to the grid. This is visible since the heat pumps only use a maximum of 0.75 MW and the Region Uppsala

…stadsbussar - Lsningar fr att hantera kapacitetsbristen i en vxande region. Uppsala: Uppsala Universitet. Jelley, N. (2019) heat pump. In (Ed.), A Dictionary of Energy Science. : Oxford University Press,. Available at: https://www…

Uppsala AUT Zeus.slu.se. (2019). Geodata Extraction Tool. [online] Available at: https://zeus.slu.se/get/?drop= [Accessed 9 May 2019]. 31 8.4 Other references Nystrand, M. (2019). Energisystemingenjr Region

…water in the bedrock. In order to take advantage of the geothermal heating there must be bore holes around 200 meters down in the ground (Energimyndigheten, 2011). The amount of bore holes in Bolnderna, Uppsala, is as of today 370 (…