| 1. |
- Axelsson, Helén, 1971, et al.
(författare)
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A New Methodology for Greenhouse Gas Reduction in Industry through Improved Heat Exchanging and/or Integration of Combined Heat and Power
- 1999
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Ingår i: Applied Thermal Engineering. ; 19/1999, Issue 7, s. 707-731
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents a method that identi®es economically optimal combinations of enhanced heat recovery, integration of combined heat and power (CHP), and fuel switching, in an existing industrial energy system at various emission levels. Novel types of composite curves based on pinch technology, representing the existing temperature levels for supplying heat and the possible ones that may be attained after retro®tting, are used as tools for estimating the opportunities for CHP and the trade-off between improved heat exchangin
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| 2. |
- Axelsson, Helén, 1971, et al.
(författare)
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Potential for Greenhouse Gas Reduction in Industry through Increased Heat Recovery and/or Integration of Combined Heat and Power
- 2003
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Ingår i: Applied Thermal Engineering. - 1404-7098. ; 23:1, s. 65-87
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Tidskriftsartikel (refereegranskat)abstract
- The potential for greenhouse gas (GHG) reduction in industry through process integration measures depends to a great extent on prevailing technical and economic conditions. A step-wise methodology developed at the author's department based on pinch technology was used to analyse how various parameters influence the cost-optimal configuration for the plant's energy system, and the opportunities for costeffective GHG emissions reduction compared to this solution. The potential for reduction of GHG emissions from a given plant depends primarily on the design of the industrial process and its energy system (internal factors) and on the electricity-to-fuel price ratio and the specific GHG emissions from the national power generation system (external factors).
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| 3. |
- Laaksometsä, Catherine, 1981, et al.
(författare)
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Energy savings combined with lignin extraction for production increase : Case study at a eucalyptus mill in Portugal
- 2009
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Ingår i: Clean Technologies and Environmental Policy. - : Springer Science and Business Media LLC. - 1618-954X .- 1618-9558. ; 11:1, s. 77-82
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Tidskriftsartikel (refereegranskat)abstract
- In previous research by the authors, energy savings combined with lignin extraction as a means to debottleneck the recovery boiler were evaluated on a model mill. The study showed that this concept was a profitable alternative to recovery boiler upgrade. In the present paper the concept was taken one step further, and the potential for energy savings and possibilities for lignin extraction were evaluated at a real mill: a market pulp mill in Portugal. The energy-saving methods proved to be applicable also to the real mill and the steam-saving potential was 4.2 GJ/ADt or 33%. Lignin extraction trials with bench scale equipment showed that lignin extraction was fully viable at the studied mill. A full-scale lignin separation plant according to the LignoBoost concept, combined with energy savings, was simulated in a computer environment and compared to installation of a new recovery boiler. A new recovery boiler had an investment cost four times higher than the LignoBoost concept combined with energy savings, but the electricity production would be higher. The profitability for a production increase of 16% was calculated for both cases. Steam savings combined with LignoBoost were found to have better profitability unless the electricity price is very high. © 2008 Springer-Verlag.
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| 4. |
- Laaksometsä, Catherine, 1981, et al.
(författare)
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Energy savings combined with lignin extraction for production increase: case study at a eucalyptus mill in Portugal
- 2007
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Ingår i: conference PRES 07, Ischia Island, Italy.. ; , s. 255-260
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Konferensbidrag (refereegranskat)abstract
- In previous research by the authors, energy savings combined with lignin extraction as a mean to debottleneck the recovery boiler were evaluated on a model mill. The study showed that this concept was a profitable alternative to recovery boiler upgrade. In the present paper the concept was taken one step further, and the potential for energy savings and possibilities for lignin extraction were evaluated at a real mill: a market pulp mill in Portugal. The energy-saving methods proved to be applicable also to the real mill and the steam-saving potential was 3.8 GJ/ADt or 30%. Lignin extraction trials with bench scale equipment showed that lignin extraction was fully viable at the studied mill. A full-scale lignin separation plant according to the LignoBoost concept, combined with energy savings was simulated in a computer environment and compared to installation of a new recovery boiler. A new recovery boiler had an investment cost four times higher than the LignoBoost concept including energy savings, but the electricity production would be higher. The profitability for a production increase of 16% was calculated for both cases. Steam savings combined with LignoBoost were found to have better profitability unless the electricity price is very high
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