| 1. |
- Gustafsson, Stig-Inge, 1948-
(författare)
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Energy usage and conservation in surfacing lines
- 2000
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Ingår i: Energy Conversion and Management. - 0196-8904 .- 1879-2227. ; 41:15, s. 1649-1669
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Tidskriftsartikel (refereegranskat)abstract
- This paper deals with energy usage and conservation for a surfacing line in a carpentry factory. In this line, wood panels are coated with paint in a highly automated fashion. The products vary in shapes and the way they shall be coated, and therefore, a number of machines are present in the line which is about 100 m long. Sanding machines, roller coaters, dryers etc. are installed, and all machinery uses electricity for their operation. There are, however, other equipments coupled to the line. One example is the wood dust transportation system, and another is the steam system used for heating purposes. By use of a number of electricity meters, monitoring ventilation flow rates etc., it has been possible to analyze how much energy is used in the surfacing line and also to propose measures to reduce this amount.
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| 2. |
- Rolfsman, Björn, 1971-
(författare)
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Optimal supply and demand investments in municipal energy systems
- 2004
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Ingår i: Energy Conversion and Management. - 0196-8904 .- 1879-2227. ; 45:4, s. 595-611
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Tidskriftsartikel (refereegranskat)abstract
- In many municipalities, there are district heating networks, which are quite commonly supplied by combined heat and power plants (CHP). A district heating network contains buildings of different types. In this paper, one such municipal energy system is analysed. In order to provide space heating and domestic hot water, investments could be made on the supply side in power plants, or on the demand side in the buildings, for example in the form of extra wall insulation. The electricity from the CHP plants is supplied to the municipality but can also be sold to the electricity market, and electricity can, of course, also be bought from the market. The variation in price on the spot market over any given day is significant. The need for district heat in the building stock also varies, for example due to climatic conditions. The energy system in the case study is analysed with a mixed integer linear programming model. The model has 3 h time steps in order to reflect diurnal variations, and an entire year is analysed. A case study is presented for the city of Linköping in Sweden. On the demand side, the options are: extra wall insulation, extra attic insulation and better types of windows. The building stock is divided into nine categories. © 2003 Elsevier Ltd. All rights reserved.
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| 3. |
- Sundberg, Gunnel, et al.
(författare)
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Investments in combined heat and power plants : Influence of fuel price on cost minimised operation
- 2002
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Ingår i: Energy Conversion and Management. - 0196-8904 .- 1879-2227. ; 43:5, s. 639-650
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Tidskriftsartikel (refereegranskat)abstract
- Liberalisation of the electricity market and governmental politics influence heat and power supply in Sweden, like in many other countries. In this paper, the impact of subsidies and fuel and electricity costs on a representative Swedish district heating system is analysed. The energy system model MODEST (model for optimisation of dynamic energy systems with time dependent components and boundary conditions) was used to optimise investments and operation for heat and power production plants. At higher electricity prices, combined heat and power introduction may be profitable in the studied system. With current fuel prices, a natural gas fired combined cycle would primarily be favourable. A lower woodchips price and a governmental grant would make cogeneration with a biomass fired steam cycle more beneficial. © 2002 Elsevier Science Ltd. All rights reserved.
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| 4. |
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| 5. |
- Gustafsson, Stig-Inge, 1948-
(författare)
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Energy Usage in Surfacing Lines
- 2001
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Ingår i: Energy Conversion and Management. - 0196-8904 .- 1879-2227. ; 41:5, s. 1649-1669
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Tidskriftsartikel (refereegranskat)abstract
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| 6. |
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