Modeling and Simulation of a Heat Recovery Steam Generator using Partially Known Design Point Data

Zewge, Mesfin G. and Lemma, T. A. and Ibrahim, A. A. and Sujan, D. (2014) Modeling and Simulation of a Heat Recovery Steam Generator using Partially Known Design Point Data. Advanced Materials Research, 845. pp. 596-603. ISSN 1662-8985

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In a cogeneration or combined heat and power plant, a heat recovery steam generator (HRSG) helps achieve overall thermal efficiency as high as 80%. The purpose of this study is to model and simulate the HRSG given partial design point data. The pinch and approach temperatures are optimized within generally accepted range. In order to satisfy the energy conservation equation, tuning parameters are used for the overall heat transfer coefficients corresponding to the evaporator and economizer. For the off-design simulation, the values of pinch and approach temperatures are adjusted until the modeling error is within a set limit. The effect of mass flow rate on the heat transfer coefficient is accounted for & by employing empirical relations. A 12 Ton/hr natural circulation HRSG was considered as a case study. The validation test on inlet temperatures of the exhaust gas and feed water to the economizer demonstrated relative percentage errors of 0.4246% and 1.8776%, respectively. The model can be used for fault detection and diagnostic system design, performance optimization, and environmental load assessment.

Item Type: Article
Uncontrolled Keywords: Heat Recovery, Steam Generator, Modeling, Simulation
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering and Quantity Surveying
Depositing User: Unnamed user with email
Date Deposited: 23 Jun 2016 02:27
Last Modified: 06 Oct 2016 02:06

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