| 1. |
- Gustafsson, Stig-Inge
(författare)
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Economic benefits from load management in a carpentry factory
- 1996
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Ingår i: Applied Thermal Engineering. - : Elsevier. - 1359-4311 .- 1873-5606. ; 16:10, s. 829-834
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Tidskriftsartikel (refereegranskat)abstract
- As a result of a National Referendum and a subsequent parliament decision Sweden will phase out its nuclear power stations before the year 2010. This source of electricity accounts for about half the total electricity usage and therefore other sources must be constructed, or the country must use less electricity. One way to accomplish this, according to economic theory, is to increase the price of electricity, and we will probably be subject to such actions, at least if there is a risk of a shortage of electricity. Hitherto, most interest for saving energy has been emphasised on space and domestic hot water heating in buildings. The major part of electricity, however, is used in industry, and is therefore worth studying in more detail. One small carpentry plant which manufactures wooden staircases and fibreboard panels for ceilings has been studied. Using monitored data for 1 year of their electricity usage and costs, the amount of money which could be saved by the owner of the factory, if different load management measures had been applied, has been calculated. Thus it was possible to find the maximum cost for equipment that can turn off some processes, such as timber dryers, for short periods.
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| 2. |
- Gustafsson, Stig-Inge
(författare)
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Municipal thermal and electricity loads : A case study in Linköping
- 1998
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Ingår i: Applied Thermal Engineering. - : Elsevier. - 1359-4311 .- 1873-5606. ; 18:5, s. 257-263
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Tidskriftsartikel (refereegranskat)abstract
- Linear programming models used for optimisation of various energy systems have received increased interest during the last ten years. One reason for this is the use of personal computers. Models with thousands of variables and constraints can now be rapidly optimised. If integers are introduced, which are necessary when increments or steps in cost functions are part of the model, the computing power is of even higher interest. However, many scientific authors do not discuss in detail how the model is designed and what basic data lie behind this design. This paper presents an attempt to study municipal thermal and electricity loads, and further how to divide data for one year into useful segments for linear and mixed integer programming purposes
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| 3. |
- Westerlund, Lars, et al.
(författare)
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Heat and mass transfer simulations of the absorption process in a packed bed absorber
- 1998
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Ingår i: Applied Thermal Engineering. - 1359-4311 .- 1873-5606. ; 18:12, s. 1295-1308
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Tidskriftsartikel (refereegranskat)abstract
- Numerical modelling of the absorption process in a cross-current absorber has been performed with FLOW3D, a commercially available software. The simulations are verified by comparisons with experimental results. The modelling of mass and heat transfer is discussed. Comparisons regarding the overall capacity as well as transfer rates show good agreement between experiments and simulations. It is possible to model the mass and heat transfer for a cross-current absorber if the equilibrium line for the absorption solution is known.
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| 4. |
- Feng, Xiao, et al.
(författare)
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Critical COP for an economically feasible industrial heat-pump application
- 1997
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Ingår i: Applied Thermal Engineering. - : Elsevier BV. - 1359-4311. ; 17:1/January 1997, s. 93-101
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, the expression for critical COP is derived for an economically feasible industrial heat-pump application. It is a function of the price ratio between input energy and heating, the price ratio between equipment and energy, and the payback period. Using this critical COP, a preliminary assessment can be made of whether an industrial heat-pump application is worth discussing further. The influences of various economic factors on the critical COP for different types of heat pumps are also discussed.
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