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  • 201.
    Skogsberg, Kjell
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Nordell, Bo
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    The Sundsvall hospital snow storage2001In: Cold Regions Science and Technology, ISSN 0165-232X, E-ISSN 1872-7441, Vol. 32, no 1, p. 63-70Article in journal (Refereed)
    Abstract [en]

    During the summer, the regional hospital in Sundsvall in central Sweden requires 1000 MW h of cooling with a maximum cooling power 1500 kW. From the summer of 2000, seasonally stored snow will be utilised to meet the cooling demand. A storage area of 140×60 m with a capacity for 60,000 m3 (40,000 tons) of snow was constructed in 1999. Initially, about half of this volume will be stored. The storage consists of a shallow pit made of watertight asphalt. A layer of wood chips covering the snow reduces the natural melting to 20–30% of the total volume. Meltwater from the snow storage is pumped to the hospital. After cooling the hospital, the heated meltwater is re-circulated to the snow storage. When all the snow has melted, the wood chips will be burnt in a local heating plant. Luleå University of Technology is responsible for the scientific evaluation of the project. This paper describes the construction and the simulated operation of the snow storage system.

  • 202.
    Stephansson, Ove
    et al.
    Luleå University of Technology.
    Nordell, Bo
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Småhus i berg: förstudie1981Report (Other academic)
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    fulltext
  • 203. Sundin, E.
    et al.
    Lundberg, Angela
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Semadeni-Davies, A.F.
    Viklander, Maria
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Nordell, Bo
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Urban Snow Research at Luleå University of Technology2000In: Nordic Hydrological Conference 2000: Uppsala, Sweden 26-30 June 2000 / [ed] Torbjörn Nilsson, Uppsala: Sveriges Lantbruksuniversitet, 2000, p. 608-615Conference paper (Refereed)
  • 204. Söderlund, Monika
    et al.
    Nordell, Bo
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Solvärme från takytor för återladdning av markvärmesystem: teoretisk studie1986Report (Other academic)
  • 205. Tuomas, Göran
    et al.
    Gustafsson, Anna-Maria
    Nordell, Bo
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Thermal response test integrated to drilling2003In: Proceedings: Futurestock 2003, 9th International Conference on Thermal Energy Storage : Warsaw, Poland, September 1 - 4, 2003, Warszawa: PW Publishing House , 2003, p. 411-415Conference paper (Refereed)
  • 206.
    Tuomas, Göran
    et al.
    Luleå University of Technology.
    Nordell, Bo
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Down-hole water driven hammer drilling for BTES applications2000In: Proceedings: TERRASTOCK 2000, 8th International Conference on Thermal Energy Storage : University of Stuttgart, Germany, August 28th until September 1st, 2000 / [ed] Martin Benner, Stutttgart: Universität Stuttgart , 2000, p. 503-508Conference paper (Refereed)
  • 207.
    Westerström, Göran
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Nordell, Bo
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Method for continuous measurement of frost depth in soil1994Report (Other academic)
    Download full text (pdf)
    fulltext
  • 208.
    Yousefi, Bagher
    et al.
    Airrigation and Drainage Engineering Department, Faculty of Water Sciences Engineering, Shahid Chamran University of Ahvaz.
    Boroomand-Nasab, Saeed
    Airrigation and Drainage Engineering Department, Faculty of Water Sciences Engineering, Shahid Chamran University of Ahvaz.
    Moazed, Hadi
    Airrigation and Drainage Engineering Department, Faculty of Water Sciences Engineering, Shahid Chamran University of Ahvaz.
    Nordell, Bo
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Condensation Irrigation Field Test: Measurements of Soil Moisture2017In: International Journal of Basic Sciences & Applied Research, ISSN 2147-3749, Vol. 6, no 3, p. 263-268Article in journal (Refereed)
    Abstract [en]

    Due to the growing population and scarcity of fresh water it is increasingly important to produce potable water by desalination of saline water. However, desalination requires energy and in a sustainable world it has to be based on renewable energy. Condensation irrigation (CI) is a method that combines desalination and irrigation. In such systems solar energy could be used to provide needed energy. By letting air flow over the water surface in a solar still with saline or polluted water, the air is humidified. The vapor-saturated airflow is then lead into buried pipes, where the air gradually cools and the water precipitates along the pipe surface. In current field study perforated PVC pipes were used i.e. the condensed water left the pipe through its walls and irrigated the surrounding soil. In PVC pipes without perforations the produced water was collected at the pipe outlet. A fan was used to force the air through the 25 m pipes of the CI system. The resulting amount of produced water per 8 hours for drinking water and irrigation was 4.0 and 6.0 l, respectively.

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    fulltext
  • 209.
    Yousefi, Bagher
    et al.
    Department of Irrigation and Drainage, Faculty of Water Sciences Engineering, Shahid Chamran University of Ahvaz, Iran.
    Lindblom, Jenny
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Nordell, Bo
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Boroomand-Nasab, Saeed
    Department of Irrigation and Drainage, Faculty of Water Sciences Engineering, Shahid Chamran University of Ahvaz, Iran.
    Chaibi, M. Thameur
    Director of National Research Institute for Rural Engineering, Water, and Forestry (INRGREF), Tunisia.
    Field solution to produce irrigation-drinking water by condensation irrigation system from seawater2022In: Water Science and Technology: Water Supply, ISSN 1606-9749, E-ISSN 1607-0798, Vol. 22, no 5, p. 5465-5479Article in journal (Refereed)
    Abstract [en]

    Condensation irrigation (CI) combines desalination with subsurface irrigation. Here, solar stills are used to heat and humidity air, which is condensed in underground drainage pipes to irrigate the soil, directly in the root zone. This article describes and evaluates a CI field test at Shahid Chamran University of Ahvaz in Iran. The objective was to gain a deeper understanding of the CI system in the production of drinking and irrigation water and to do a detailed assessment of heat and moisture transfer in the soil. Perforated and unperforated PVC pipes were used in two separate experiments while airflow properties, soil temperature and humidity, and ambient air temperature were monitored. The system produced 6 kg of irrigation water during eight hours, in the 25 m long pipe. When using an unperforated pipe, 4 kg of freshwater was collected at the pipe ending after eight hours of operation. The preliminary economic analysis of irrigation system indicates a payback time of less than 6 years.

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    fulltext
2345 201 - 209 of 209
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