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Case study of energy systems with gas turbine cogeneration technology for an eco-industrial park
Mälardalen University, School of Sustainable Development of Society and Technology. (PRO)
Mälardalen University, School of Sustainable Development of Society and Technology.ORCID iD: 0000-0003-0300-0762
2008 (English)In: International journal of energy research (Print), ISSN 0363-907X, E-ISSN 1099-114X, Vol. 32, no 12, p. 1128-1135Article in journal (Refereed) Published
Abstract [en]

Eco-industrial parks (EIP) are clusters of industry corporations that collaborate with reusing waste and energy-efficient use of resources with no or minor impact on the environment. This paper presents a case study that examines the feasibility of using gas turbine technology in one industrial park, located in the Dongguan city of the Guangdong province in China. A model of a gas turbine-based combined heat and power (CHP) plant with a heat recovery steam generator for absorption cooling was developed and simulated. A steam-injected gas turbine has been selected in the system to increase electricity production and to generate steam. The study includes performance analysis of the cogeneration plant in terms of thermal efficiency, cost estimation, and greenhouse gas emission. The gas turbine-based cogeneration system has been compared with a baseline reference case that is defined as if all the energy to the industrial park is supplied from the local electricity grid. The results show that the gas turbine-based cogeneration system can reach a total efficiency of 58% and reduce CO2 emissions with 12 700 tons per year. A sensitivity analysis on the costs of the system has also been made based on fuel costs and the interest rate, which shows that the investigated system is economically profitable at natural gas prices below 4.4 RMB m-3 with fixed electricity prices and at electricity prices above 736 RMB MWh-1 with fixed natural gas prices. The sensitivity analysis based on the interest rate showed that the proposed system is economically feasible with interest rates up to 16%.

Place, publisher, year, edition, pages
2008. Vol. 32, no 12, p. 1128-1135
Keywords [en]
eco-industrial park • EIP • gas turbine, cogeneration, efficiency improvement, steam injection gas turbine
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:mdh:diva-4518DOI: 10.1002/er.1450ISI: 000260190400007Scopus ID: 2-s2.0-55949133547OAI: oai:DiVA.org:mdh-4518DiVA, id: diva2:128238
Available from: 2008-12-15 Created: 2008-12-15 Last updated: 2017-12-14Bibliographically approved
In thesis
1. From Combined Heat and Power to Polygeneration
Open this publication in new window or tab >>From Combined Heat and Power to Polygeneration
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In order to reach targets on reducing greenhouse gas emissions from fossil resources it is necessary to reduce energy losses in production processes. In polygeneration, several processes are combined to complement each other to avoid sub-optimization of the standalone processes. This thesis addresses polygeneration with focus on Combined Heat and Power (CHP) production integrated with other processes. Biomass-fired CHP plants are commonly dimensioned to have surplus heat production capacity during periods with lower heat demand. At the same time, production of biomass based vehicle fuels and fuel upgrading are heat demanding processes. The opportunity to combine CHP with ethanol production from lignocellulosic feedstock and torrefaction with the aim of replacing fossil fuels are used as cases during the evaluation of polygeneration. Simulation models are used to investigate the performance of CHP integrated with production of ethanol and torrefaction. Measured data from commercial CHP plants have been used to reflect the operation boundaries. The findings show that polygeneration can compete with stand-alone production in both energy and economic performance. Polygeneration offers a wider operating range where reduced minimum load gives increased annual operating time. Therefore, under limited heat demand more renewable electricity production is possible due to increased operating hours and steam extraction from the turbine during part-load operation. Resource availability and fluctuations in fuel price have the largest impact on the profit of polygeneration. Other aspects that have substantial effects on the economy in polygeneration are the electricity spot price and subsidies. Furthermore, it has been proven that the yield of each product in a multiproduct process plant, the size of the plant and the heat demand have a large impact on the economy. Polygeneration turns by-products into buy-products.

Place, publisher, year, edition, pages
Västerås: Mälardalen University, 2015
Series
Mälardalen University Press Dissertations, ISSN 1651-4238 ; 181
National Category
Mechanical Engineering
Research subject
Energy- and Environmental Engineering
Identifiers
urn:nbn:se:mdh:diva-28442 (URN)978-91-7485-221-9 (ISBN)
Public defence
2015-09-02, Paros, Mälardalens högskola, Västerås, 13:15 (English)
Opponent
Supervisors
Available from: 2015-07-06 Created: 2015-06-23 Last updated: 2015-08-24Bibliographically approved

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Yan, J.

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