Analytical Off-design Characteristics of Gas Turbine-Based CCHP System

Yang, Cheng; Huang, Zhifeng; Yang, Zeliang; Ma, Xiaoqian

doi:10.1016/j.egypro.2015.07.528

Cited by 12 publications

(2 citation statements)

References 9 publications

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“…The analytical method of determination of part load performance of combined cycle by changing the temperature at gas turbine inlet is presented in [9]. The authors of [10] proposed the methodology of the integrated simulation of a gas turbine engine by using CFD to predict performance of the gas turbine engine components.…”

Section: Introductionmentioning

confidence: 99%

Direct Off-Design Performance Prediction of Micro Gas Turbine Engine for Distributed Power Generation

Barannik¹,

Burlaka²,

Moroz³

et al. 2017

Volume 1: Compressors, Fans and Pumps; Turbines; Heat Transfer; Combustion, Fuels and Emissions

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Central-station power plants (CSPP) are the main provider of energy today. In the process of power generation at central-power stations, about 67% of primary energy is wasted. Distributed cogeneration or combined heat and power (CHP) systems are an alternative to central-station power plants. In these systems, an electrical generation system located in a residence or at a commercial site consumes natural gas to generate electricity locally and then the exhaust heat is utilized for local heating needs (in contrast to being wasted at central-stations). Microturbines offer a number of potential advantages compared to other technologies for small-scale power generation. For example, compact size and low-weight leading to reduced civil engineering costs, a small number of moving parts, lower noise and vibration, multi-fuel capabilities, low maintenance cost as well as opportunities for lower emissions. Inverter generators allow using micro-turbines of different shaft rotation speed that opens opportunities to unit optimization at off-design modes. The common approach to predict the off-design performance of gas turbine unit is the mapping of the compressor and the turbine separately and the consequent matching of common operation points. However, the above-mentioned approach might be rather inaccurate if the unit has some secondary flows. In this article an alternative approach for predicting off-design performance without using component maps is presented. Here the off-design performance is done by direct calculation of the components performances. On each off-design mode, the recalculation of the characteristic of all scheme components, including a compressor, gas turbine, combustor, recuperator and secondary flow system is performed. The different approaches for obtaining the performance at off-design modes considering the peculiarities of the gas turbine engine are presented in this paper.

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Section: Introductionmentioning

confidence: 99%

Direct Off-Design Performance Prediction of Micro Gas Turbine Engine for Distributed Power Generation

Barannik¹,

Burlaka²,

Moroz³

et al. 2017

Volume 1: Compressors, Fans and Pumps; Turbines; Heat Transfer; Combustion, Fuels and Emissions

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show abstract

“…If the CHP is supposed to become a CCHP the cooling system will be another main component of the cycle. The power generator unit (PGU) or prime mover of a CHP system may be chosen among different types of fuel cells [6], micro steam or micro gas turbines [7], industrial large size gas turbines [8], industrial steam turbines [9] , Stirling engines [10], internal combustion engines [11] etc. Deciding about the PGU of a CHP cycle requires gathering and analyzing so much technical, economical, environmental and social data about the PGUs.…”

Section: Introductionmentioning

confidence: 99%

Designing, manufacturing and testing of a micro combined heat and power (micro-CHP) system

Ebrahimi¹,

Lahonian²,

Farhadi³

2017

KJAR

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Abstract:In the present paper a micro-CHP is designed, built and tested based on a 5 kW diesel engine that is chosen to recover its water jacketing and exhaust waste energy and convert it into hot water. The hot water may be used as heating source or domestic hot water. Heat recovery for the lube oil, radiation, convection, and conduction to ambient is not used since they all count for only 13% of the inlet fuel energy. The results include the main characteristics in the design section, some pictures of the main components, the temperature of exhaust, water jacketing and tap water at different points of the system. In addition the heat recovery at different engine loads is also given. The experiments and results show that the overall efficiency of the CHP system can reach 60% which means more than 30% increase of efficiency when comparing with the case when only electricity was supposed to be produced by the engine.

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