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Journal of Green EngineeringJournal divested in January 2019, new journal website is: www.jgenng.com

Editor-in-Chief: Michele Albano, ISEP - Instituto Superior de Engenharia do Porto, Portugal

ISSN: 1904-4720 (Print Version),

ISSN: 2245-4586 (Online Version)
Vol: 4   Issue: 2

Published In:   January 2014

Publication Frequency: Quarterly

Search Available Volume and Issue for Journal of Green EngineeringJournal divested in January 2019, new journal website is: www.jgenng.com

Journal Description        Read Full Articles        Editorial Board        Subscription        Indexed

Green Energy Production:The Potential of Using Biomass Gasification

doi: https://doi.org/10.13052/jge1904-4720.421
Edris Madadian, Mark Lefsrud, Camilo Andres Perez Lee and Yves Roy

Department of Bioresource Engineering, McGill University, Macdonald Campus, Macdonald-Stewart Building, 21,111 Lakeshore Rd., Ste. Anne de Bellevue, QC, H9X 3V9, Canada

Abstract: [+]    |    Download File [ 1343KB ]    |   Read Article Online

Abstract: Biomass gasification shows a great potential to displace fossil fuels. In this paper, the potential of bioenergy production from biomass feedstock has been investigated, focusing on gasification technology as an environmentally friendly alternative. The present research is principally focused on a down draft gasifier equipment kit (GEK) unit. Biomass encompasses a wide range of feedstocks such as agricultural residues, energy crops, forestry materials, food waste, municipal solid waste, grains and starch crops. An efficient gasification unit produces syngas with calorific value up to 20 MJ/kg. Syngas predominately consists of a mixture of hydrogen and carbon monoxide. This syngas can be used in a number of different processes including electricity generation, steam generation, transportation fuels, hydrogen production as well as chemical production, fertilizer manufacturing and consumer products. Results from our research highlight the potential of biomass gasification as a strong alternative for bioenergy production and a substitute for fossil fuels.

Keywords: Biomass feedstock, Gasification, Renewable energy, Syngas.

Design and Perfromance Characteristics of a Portable Solar-Driven Thermoelectric Heat Pump under Thunder Bay Extreme Cold Conditions in Northwestern Ontario, Canada

doi: https://doi.org/10.13052/jge1904-4720.422
B. I. Ismail and N. Alabdrabalnabi

Department of Mechanical Engineering, Lakehead University 955 Oliver Road, Thunder Bay, Ontario P7B5E1, Canada

Abstract: [+]    |    Download File [ 3642KB ]    |   Read Article Online

Abstract: Renewable & alternative non-conventional green energy technologies used for heat-pumping applications have shown real merits and received renewed interest in recent years especially in small-scale portable heating applications. Solar-driven thermoelectric heat pumping is one of these innovative technologies. In this paper, a thermoelectric heat pump that utilizes the Peltier effect has been designed, constructed and instrumented for suitable experimentation and characterization under Thunder Bay city extreme cold weather conditions in Canada. The thermoelectric test setup is powered using a renewable solar photovoltaic system and tested under different operating conditions. It was found that the PV-powered thermoelectric heat pump system has shown an acceptable performance with COP ranging from 0.98–1.22. Typical results showed that the average heat pumping power for the system was 72.1 W when the system was operated at an ambient temperature of –17oC with an inside system temperature increased from approximately –5 oC to 25oC.

Keywords: Clean renewable energy, solar PV, Thermoelectric, heat pump, Thunder Bay.

Development of Adsorption Steam Generator fromWarmWater

doi: https://doi.org/10.13052/jge1904-4720.423
T. Nakagawa, Takahiro Nishi and Yu Notoji

Department of System Engineering, Okayama Prefectural University, Okayama 719–1197, Japan

Abstract: [+]    |    Download File [ 4073KB ]    |   Read Article Online

Abstract: Reducing CO2 emissions and restraining dependence on nuclear power generation are serious concerns in the prevention of global warming since the Great East Japan Earthquake. To do so, it is necessary to use and expand green energy such as solar energy and to promote energy conservation. However in high-latitude regions, it is difficult to directly and effectively use solar power due to on insufficient amount of solar radiation. If steam can be generated from warm water at less than 373 K, it is possible to obtain steam by solar water heaters from weak solar radiation, hot springs and industrial waste warm water without the consumption of any fossil fuels. In this study, the authors have been developing a system which generates steam over 423Kfrom warm water at less than 373 K using an adsorption heat pump with a zeolite. Therefore, improved bench-scale equipment which generates steam continuously and the experimental results are mentioned.

Keywords: Steam generation, heat pump, zeolite, energy conservation, hot water.

Impacts of Green Electricity Markets in the United Kingdom, Germany and Finland

doi: https://doi.org/10.13052/jge1904-4720.424
Hast A.1, McDermott L.2, Syri S.1 and Järvelä M.2

1Department of Energy Technology, Aalto University, PO Box 14100, FI-00076 Aalto, Finland
2Department of Social Sciences and Philosophy, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä, Finland

Abstract: [+]    |    Download File [ 671KB ]    |   Read Article Online

Abstract: In liberalized electricity markets, a wide variety of competing green electricity products are available to customers in addition to competition on tariff price. These voluntary products are marketed as environmentally friendly and claimed to support renewable energy production, new capacity building and offer other environmental benefits.

We review products in the UK, Germany and Finland and find that they encompass different mechanisms such as renewable sourcing, green funds or carbon offsetting. The interface between voluntary markets and renewable energy policies is especially studied. We assess if voluntary products offer additional benefits and identify possible problems like double counting or merely re-marketing hydropower produced in existing plants.

We analyse the transparency of products and their other sustainability impacts like energy efficiency improvements, local production, reduction of imported fuels or river restoration. We find that labels are important in increasing market transparency and setting criteria for green energy products.

Keywords: Green electricity products, certification schemes, voluntary markets, Eastern Finland.

River Publishers: Journal of Green Engineering<sup><font color=#f91b02>Journal divested in January 2019, new journal website is: <a href="http://www.jgenng.com/">www.jgenng.com</a> </font></sup>