Optimum microturbine sizing in small scale CHP systems

Mehdi Aghaei Meybodi, Masud Behnia

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


Microturbines are ideally suited for distributed generation applications due to their flexibility in connection methods. They can be stacked in parallel for larger loads and provide stable and reliable power generation. One of the main applications of microturbines is operating as the prime mover in a combined heat and power (CHP) system. CHP systems are considered to be one of the best ways to produce heat and power with efficient fossil fuel consumption. Further, these systems emit less pollution compared to separate productions of the same amount of electricity and heat. In order to optimally benefit from combined heat and power systems, the proper sizing of prime movers is of paramount importance. This paper presents a technical-economic method for selecting the optimum number and nominal power as well as planning the operational strategy of microturbines as the prime movers of small scale combined heat and power systems (capacities up to 500 kW) in three modes of operation: one-way connection (OWC) mode, two-way connection (TWC) mode, and heat demand following (HDF) mode. In the proposed sizing procedure both performance characteristics of the prime mover and economic parameters (i.e. capital and maintenance costs) are taken into account. As the criterion for decision making Net Present Worth (NPW) is used. In our analysis we have also considered the impact of carbon tax on the economics of generation. The proposed approach may also be used for other types of prime movers as well as other sizes of CHP system. 

Original languageEnglish
Title of host publicationProceedings of the ASME 5th International Conference on Energy Sustainability 2011
Subtitle of host publicationpresented at ASME 2011 5th International Conference on Energy Sustainability, August 7-10, 2011, Washington, DC USA
Place of PublicationNew York
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages6
ISBN (Print)9780791854686
Publication statusPublished - 2011
Externally publishedYes
EventASME 2011 5th International Conference on Energy Sustainability, ES 2011 - Washington, DC, United States
Duration: 7 Aug 201110 Aug 2011


OtherASME 2011 5th International Conference on Energy Sustainability, ES 2011
Country/TerritoryUnited States
CityWashington, DC


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