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International Journal of Energy Science
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  This is an Open Access Journal Open Access journal
     ISSN (Print) 2218-6026 - ISSN (Online) 2304-3679
     Published by Science and Engineering Publishing Company Homepage  [46 journals]
  • Energy Saving Goals and Target Setting for Combined Heat and Power
           Systems--A Study Based on Data Analysis of Wastewater Treatment Plants in
           the U.S.

    • Abstract: Energy Saving Goals and Target Setting for Combined Heat and Power Systems--A Study Based on Data Analysis of Wastewater Treatment Plants in the U.S.
      Pages 132-140
      Author Yesim SireliIrene OkiogaTiffany Storm
      The Water and Environment Research Federation estimates that wastewater and biosolids can store approximately ten times the energy needed for treatment. This energy can be captured through combined heat and power (CHP) systems in wastewater treatment plants (WWTP) that utilize anaerobic digestion. Despite this energy potential, more than 20% of WWTPs in the U.S with anaerobic digestion capacity do not deploy CHP sytems. One major factor that slowed the growth of these systems in the wastewater industry is the lack of sufficient reference data and guidelines for selecting energy targets. Based on a comprehensive compilation of combined heat and power energy data, this study groups WWTPs into six categories according the amount of flow. As a result, it suggests CHP electrical energy targets for each category.
      PubDate: 2014-08-01
       
  • Wind Energy Based Packet Energy System

    • Abstract: Wind Energy Based Packet Energy System
      Pages 123-131
      Author M. Tariq IqbalMd Shakhawat Hossai
      This paper proposes a wind turbine and battery storage based packet energy system. The proposed energy packet network can be used to make renewable energy sources more practical and supply energy on demand. The flow of energy in the energy packet network is controlled by a Smart Energy Dispatching Centres (SEDC). SEDCs receive the energy requests from the customers and it tries to optimize the energy flows by making the best use of renewable energy resources, existing price and policies. The proposed energy system can take energy flow instructions from a SEDC. In the present analysis a small wind energy system with battery storage has been simulated in Matlab/Simulink. The system has been modelled using low order transfer functions. Random switching has been done to get energy packets from the model. A prototype of the battery based energy storage system has been designed and implemented. Lab tests and simulation results indicates that the designed packet energy network system is able to provide energy packet as required by the grid. Additionally the output power from a very large energy packet network is also found to be stable with the existence of large load fluctuation.
      PubDate: 2014-08-01
       
  • Assessment of Energy Production Options in Lieu of Orange Cultivation in
           Ribera Baixa (Valencia), Spain

    • Abstract: Assessment of Energy Production Options in Lieu of Orange Cultivation in Ribera Baixa (Valencia), Spain
      Pages 109-122
      Author Alfred WongEnrique A. Navarr
      The Comunitat Valenciana is the largest orange producing area in the European Union. During the past decade, orange cropping has been under severe economic stress arising from increasing competition from less-costly foreign imports. Consequently, farm-gate prices are depressed to the extent that it has effectively fallen to the same or below the cost of production. Orange groves are being abandoned in many instances. Preliminary assessment showed that conversion of orange grove in Ribera Baixa to produce energy does not appear to be a viable option. Electric power generation is not practicable in the absence of government feed-in tariff subvention. Photovoltaic power generation might however be practicable for self consumption under certain circumstances. Use of crude microalgal oil does not provide sufficient economic benefits to the prospective on-road end uses, in absence of any excise tax exemption. The production yield of crude moringa oil is far below that of crude microalgal oil to be of competitive interest.
      PubDate: 2014-08-01
       
 
 
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