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Energikartläggning för Bureåbostäder AB: Med investeringskalkyl för installation av bergvärme
2016 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

During this work, an energy survey of six apartment building, (in the report termed as house 29, 32, 61, 62, GK and PZ), has been executed for Bureåbostäder AB. Input energy in the form of pellets- and electric heating has been inventoried to show the heat demand for each apartment building. Based on the heat demand investment calculations for the installation of geothermal heating have been made for each house. The calculation resulted in a lower pellets energy consumption for heating of every house in the survey. The results of the thesis are: •The net calorific value of the pellets was determined to be 4900 kWh per tonne.•System efficiencies for the boilers at Bureåbostäder have been set to 71% for pellet boilers and 75% for the modified oil boilers. •Inventory of tonnes of consumed pellets gives a mean value in tonnes per year for each house. The consumption of pellets ranged from 13 tonnes to 38 tonnes per year for the different properties. •After deductions of major electricity consumers such as washing machines and engine warmers were made on the property electricity, a mean value of the heating supplied by electricity was given for each property. The electrical energy input ranged from 4 000 kWh to 21 000 kWh per year for the different properties.•A mean value of the total heat demand was then calculated for each house, in kWh per year:oHus 61 & 62 – 152 000 kWh/yearoHus 29 – 56 000 kWh/yearoHus 32 – 53 000 kWh/yearoHus GK – 54 000 kWh/yearoHus PZ – 82 000kWh/year•An investment calculation for drilling and the purchase of ground source heat pump (GSHP) for each house was then calculated, whereas 70 % of the total heat demand is accounted for by ground source heating. For house 61 & 62 two options of heat pumps are available. A break-even time was made by counting investment cost subtracted with the savings for every following year:oHouse 61 & 62 with GSHP, 30 kW: 6 years, more than 4 monthsoHouse 61 & 62 with GSHP, 40 kW: 6 years, around 2 monthsoHouse 29 with GSHP, 4-16 kW: 6 years, more than 7 monthsoHouse 32 with GSHP, 4-16 kW: 6 years, around 9 monthsoHouse GK with GSHP, 4-16 kW: 7 years, around 1 month oHouse PZ with GSHP, 24 kW: 5 years, more than 9 months•The differences in costs between each property, and each ground source heat pump, with today’s costs have then been calculated to see if geothermal heating is a viable investment. oHouse 61 & 62 with GSHP, 30 kW: 53 000 kroHouse 61 & 62 with GSHP, 40 kW: 57 000 kroHouse 29 with GSHP, 4-16 kW: 22 800 kroHouse 32 with GSHP, 4-16 kW: 21 000 kroHouse GK with GSHP, 4-16 kW: 20 000 kroHouse PZ with GSHP, 24 kW: 29 000 kr

Place, publisher, year, edition, pages
2016. , 75 p.
Keyword [en]
Keyword [sv]
Teknik, energikartläggning, bureåbostäder, bergvärme
URN: urn:nbn:se:ltu:diva-52443Local ID: 990f1a4a-5757-4497-84fe-ad1fc6b2785fOAI: diva2:1025813
External cooperation
Subject / course
Student thesis, at least 15 credits
Educational program
Energy Engineering, bachelor's level
Validerat; 20160627 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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