Calibration and validation of a model for simulating thermal and electric performance of an internal combustion engine-based micro-cogeneration device

• Published in: Applied thermal engineering Vol. 45-46; pp. 79 - 98
• Main Authors: Rosato, A., Sibilio, S.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.12.2012; Elsevier
• Subjects: Applied sciences; Building simulation; Cogeneration; Combined power plants; Computer simulation; Devices; Energy; Energy. Thermal use of fuels; Engines and turbines; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc; Exact sciences and technology; Heat transfer; Installations for energy generation and conversion: thermal and electrical energy; Internal combustion; Internal combustion engine; Mathematical models; Model calibration; Model validation; Residential; Theoretical studies. Data and constants. Metering; Thermal engineering; Vibration; Building simulation; Internal combustion engine; Model calibration; Cogeneration; Model validation; Measurement; Noise; Performance characteristic; Flexibility; Modeling; Load control; Database; Simulation program; Simulation model; Operating system; Air pollution control; Vibration; Buildings; Appeal; Markets; Specification; Calibration; Simulation; Feasibility; Performance; Comparative study; Natural gas; Combined power plant; Residential sector
• ISSN: 1359-4311
• DOI: 10.1016/j.applthermaleng.2012.04.020

The growing worldwide demand for more efficient and less polluting forms of energy production has led to a renewed interest in the use of micro-cogeneration technologies in the residential. Among the others technologies, internal combustion engine-based micro-cogeneration devices are a market-ready technology gaining an increasing appeal thanks to their high efficiency, fuel flexibility, low emissions, low noise and vibration. In order to explore and assess the feasibility of using internal combustion engine-based cogeneration systems in the residential sector, an accurate and practical simulation model that can be used to conduct sensitivity and what-if analyses is needed. A residential cogeneration device model has been developed within IEA/ECBCS Annex 42 and implemented into a number of building simulation programs. This model is potentially able to accurately predict the thermal and electrical outputs of the residential cogeneration devices, but it relies almost entirely on empirical data because the model specification uses experimental measurements contained within a performance map to represent the device specific performance characteristics coupled with thermally massive elements to characterize the device's dynamic thermal performance. At the Built Environment Control Laboratory of Seconda Università degli studi di Napoli, an AISIN SEIKI micro-cogeneration device based on natural gas fuelled reciprocating internal combustion engine is available. This unit has been intensively tested in order to calibrate and validate the Annex 42 model. This paper shows in detail the series of experiments conducted for the calibration activity and examines the validity of this model by contrasting simulation predictions to measurements derived by operating the system in electric load following control strategy. The statistical comparison was made both for the whole database and the segregated data by system mode operation. The good agreement found in the predictions of net electric power production, useful thermal output and primary power consumption allowed to conclude that the Annex 42 model can be used to carry out a detailed performance assessment in order to examine the applicability of the AISIN SEIKI unit for supplying building electrical and thermal energy requirements according to different load profiles during annual or multi-year operation. ► MCHP systems can reduce primary energy consumption and greenhouse gas emissions. ► A simulation model can be used to assess the feasibility of using MCHP systems. ► A MCHP simulation model has been experimentally calibrated and validated.