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  • 1.
    Harahap, Fumi
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy and Climate Studies, ECS.
    Silveira, Semida
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy and Climate Studies, ECS.
    Khatiwada, Dilip
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy and Climate Studies, ECS.
    Cost competitiveness of palm oil biodiesel production in Indonesia2019In: Energy Journal, ISSN 0195-6574, E-ISSN 1944-9089, Vol. 170, p. 62-72Article in journal (Refereed)
    Abstract [en]

    This study investigates opportunities to improve the cost competitiveness of the palm oil biodiesel industry in Indonesia. It compares costs and revenues of standalone conventional palm oil and biodiesel production with an integrated system that includes utilisation of biomass residues. Economic metrics, viz. net income, NPV, IRR, payback period and biodiesel breakeven price are evaluated. Sensitivity analyses are carried out to verify how parameter changes affect net income. The results show that the integrated concept with upgraded CPO and biodiesel processing plant (Biorefinery), which simultaneously produces biodiesel, electricity, heat and biofertiliser, can obtain an additional income of 14 USD/t-FFB compared to the Conventional System. The biorefinery system helps to reduce dependency on government subsidy for biodiesel production, and lowers the industry vulnerability to fluctuation of fossil diesel prices. The shift to modern facilities with value chain integration provides a pathway to enhance the share of renewable energy in Indonesia through increased biodiesel production and electricity generation from palm biomass residues. It may also promote resource efficiency and climate change mitigation through reduced emissions from untreated residues and fossil energy carriers. The analysis enhances understanding about potential gains and consequences of more stringent policy implementation in the country.

  • 2.
    Huang, Yalin
    et al.
    KTH, School of Electrical Engineering (EES), Electric Power and Energy Systems.
    Söder, Lennart
    KTH, School of Electrical Engineering (EES), Electric Power and Energy Systems.
    Evaluation of economic regulation in distribution systems with distributed generationIn: Energy Journal, ISSN 0195-6574, E-ISSN 1944-9089Article in journal (Refereed)
    Abstract [en]

    The task of this paper is to study the economic regulation impact on distribution system investment by a network expansion planning model. Distributed generation (DG) integration has been taken into consideration in network investment worldwide. In most studies, DG units are planned by distribution system operators (DSOs). However, in some countries DSOs are not allowed to own generation due to unbundling regulation. In the proposed model formulation, DG units are not owned by the DSOs. Moreover, fluctuation from load and DG in the planning periods, DGcurtailment possibility and regulation on losses and DG connection fees are altogether considered.Dierent regulation arrangements are studied in the same testing network and the resulting network expansion costs are compared. The main value of this paper is in the application of network planning model to the economic regulation analysis, in the quantication of the impact of dierenteconomic regulation frameworks and in the conclusions drawn on the implications of dierentregulation choices for distributed generation integration.

  • 3.
    Kabalina, Natalia
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology. Instituto Superior Tecnico, Universidade de Lisboa, Lisboa, Portugal.
    Costa, Mario
    Instituto Superior Tecnico, Universidade de Lisboa, Lisboa, Portugal.
    Weihong, Yang
    KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Energy and Furnace Technology.
    Martin, Andrew R.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
    Impact of a reduction in heating, cooling and electricity loads on the performance of a polygeneration district heating and cooling system based on waste gasification2018In: Energy Journal, ISSN 0195-6574, E-ISSN 1944-9089, Vol. 151, p. 594-604Article in journal (Refereed)
  • 4.
    Mainali, Brijesh
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy and Climate Studies, ECS.
    Emran, Saad Been
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy and Climate Studies, ECS.
    Silveira, Semida
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy and Climate Studies, ECS.
    Greenhouse gas mitigation using poultry litter management techniques in Bangladesh2017In: Energy Journal, ISSN 0195-6574, E-ISSN 1944-9089, Vol. 127, p. 155-166Article in journal (Refereed)
    Abstract [en]

    Poultry activities have expanded significantly in Bangladesh in recent years. The litter generated from rural poultry farms is often dumped in low ground neighboring areas resulting in greenhouse gas emissions, as well as water and air pollution. This study estimates the GHG emissions of a typical rural layer poultry farm in Bangladesh, and identifies the GHG emissions reduction potential when poultry litter management techniques are used to produce biogas, generating electricity and bio-fertilizer. Life-cycle assessment (LCA) has been used for a systematic evaluation of GHG-emissions considering the local supply chain in a typical rural layer poultry farm. The analysis shows that the GHG-emissions at the poultry farm amount to 1735 KgCO2eq/10000 eggs produced if the litter is untreated. With the installation of an anaerobic digester, the emission intensity could be reduced by 65% if the gas is used to replace LPG for cooking purposes. If 100% digested slurry is utilized as bio-fertilizer, the emissions intensity could be further reduced by 17 times compared to the case without slurry utilization. These results justify the consideration of national programs to improve conditions in poultry farms in Bangladesh. 

  • 5.
    Taliotis, Constantinos
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy Systems Analysis.
    Taibi, Emanuele
    Howells, Mark
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy Systems Analysis.
    Rogner, Holger
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy Systems Analysis.
    Bazilian, Morgan
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy Systems Analysis.
    Welsch, Manuel
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy Systems Analysis.
    Renewable Energy Technology integration for the island of Cyprus: A cost-optimization approach2017In: Energy Journal, ISSN 0195-6574, E-ISSN 1944-9089, Vol. 137, p. 31-41Article in journal (Refereed)
    Abstract [en]

    In light of the ongoing financial crisis, Cyprus is called to transform its energy sector. The high electricity cost has been recognized as a priority issue and authorities on the island are considering several available options to reduce electricity tariffs. A fuel switch from oil to gas, domestic or imported, an electrical cross-border interconnection and a rapid increase in the share of renewable energy are among the major options being considered. Focusing on the power supply of Cyprus, the present study uses a cost-optimization tool to investigate the impact of different combinations of policy decision, resulting in a series of different scenarios, with some common key findings, with the aim of directly informing future energy policy decisions. Results indicate that renewable energy technologies will play a major role regardless the decisions taken. However, a set of enabling regulatory and market changes on the horizon might prevent least-cost deployment of renewables to take place. This study will review the findings and make some recommendations on the achievement of this optimal pathways for the evolution of Cyprus electricity sector.

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