| 61. |
- Nilsson, Lars J, et al.
(författare)
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Counting beans or moving mountains - the predicament of energy efficiency policy
- 2011
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Ingår i: Energy efficiency first. - Stockholm : European Council for an Energy Efficient Economy (ECEEE). - 9789163344558
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Konferensbidrag (refereegranskat)abstract
- Many studies identify energy efficiency as the most important and least costly option for reducing CO2-emissions while at the same time contributing to other policy objectives. The main challenge seems to be how to design, implement and evaluate policy to ensure that these opportunities are captured and policy perceived as legitimate. There is often a gap between rhetoric or broadly stated objectives in policy development and the narrow focus on verifying additional savings in evaluation. Ancillary benefits and costs are often overlooked and the primary criteria for impact evaluations are whether policies deliver additional and cost-effective savings. In practice, however, such impact evaluations are fraught with fundamental methodological difficulties and uncertainty. Double counting, spill-over, free rider and rebound effects are real and recognised factors that complicate evaluation. This has been experienced in the development of a harmonised calculation model as stipulated by the Energy Services Directive where a fair amount of attention has been given to such factors. In the mean time the more challenging, yet non-binding, 20 percent target of the EU Energy Efficiency Action Plan is stressing a need for new policy implementation. The question then becomes: how can the legitimate demands for policy to deliver additional savings be realistically addressed in practice and balanced against broad and long-term objectives? To answer this question, we provide an overview and assessment of the issues, opportunities, and correction factors for energy efficiency policy design and evaluation. We challenge the preoccupation with verifying countable savings and argue that it can be counterproductive. What counts are policy frameworks that can unleash and accelerate energy efficiency across all sectors in order to reach levels that are commensurate with broader energy and climate policy goals.
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| 62. |
- Nilsson Lill, Sten O., 1970, et al.
(författare)
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Application of Q2MM to Stereoselective Reactions
- 2010
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Ingår i: Current Organic Chemistry. - : Wiley. - 1385-2728. ; 14:15, s. 1629-1645
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Tidskriftsartikel (refereegranskat)abstract
- Q2MM is a method designed to allow application of molecular mechanics calculations to transition states in chemical reactions. It is one of the few methods available that allow determination of a complete set of low-energy transition states for medium-sized systems, and thereby gives a unique opportunity to investigate kinetic selectivity, in particular stereoselectivity. The current review will give an outline of the procedure, an overview of the types of reactions that have been studied using this method, and summarize the factors affecting the accuracy of the results.
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| 63. |
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| 64. |
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| 65. |
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| 66. |
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| 67. |
- Nilsson, Patrik, et al.
(författare)
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Laboratory evaluation of a gasifier particle sampling system using model compounds of different particle morphology
- 2011
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Ingår i: Biomass Conversion & Biorefinery. - : Springer Science and Business Media LLC. - 2190-6815 .- 2190-6823. ; 1:2
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Tidskriftsartikel (refereegranskat)abstract
- The objective of this work was to design and evaluate an experimental setup to be used for field studies of particle formation in biomass gasification processes. The setup includes a high-temperature dilution probe and a denuder to separate solid particles from condensable volatile material. The efficiency of the setup to remove volatile material from the sampled stream and the influence from condensation on particles with different morphologies is presented. In order to study the sampling setup model, aerosols were created with a nebulizer to produce compact and solid KCl particles and a diffusion flame burner to produce agglomerated and irregular soot particles. The nebulizer and soot generator was followed by an evaporation–condensation section where volatile material, dioctylsebacete (DOS), was added to the system as a tar model compound. The model aerosol particles were heated to 200°C to create a system containing both solid particles and volatile organic material in gas phase. The heated aerosol particles were sampled and diluted at the same temperature with the dilution probe. Downstream the probe, the DOS was adsorbed in the denuder. This was achieved by slowly decreasing the temperature of the diluted sample towards ambient level in the denuder. Thereby the supersaturation of organic vapors was reduced which decreased the probability for tar condensation and nucleation of new particles. Both the generation system and the sampling technique gave reproducible results. A DOS collection efficiency of >99% was achieved if the denuder inlet concentration was diluted to less than 1–6 mg/m3 depending on the denuder flow rate. Concentrations higher than that lead to significant impact on the resulting KCl size distribution. The choice of model compounds was done to study the effect from the particle morphology on the achieved particle characteristics after the sampling setup. When similar amounts of volatile material condensed on soot agglomerates and compact particles, a substantially smaller growth in mobility diameter was found for soot compared with compact KCl.
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| 68. |
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| 69. |
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