Validated dynamic energy model for a Stirling engine μ-CHP unit using field trial data from a domestic dwelling
| Autor: | Lacour Ayompe, Aidan Duffy, G. Conroy |
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| Rok vydání: | 2013 |
| Předmět: |
Engineering
Stirling engine Continuous operation business.industry Mechanical Engineering Thermal power station Building and Construction Automotive engineering law.invention Cogeneration law Electricity Electric power Electrical and Electronic Engineering business MATLAB computer Simulation Thermal energy Civil and Structural Engineering computer.programming_language |
| Zdroj: | Energy and Buildings. 62:18-26 |
| ISSN: | 0378-7788 |
| Popis: | This paper presents the development and validation of a dynamic energy performance model for a WhisperGen Stirling engine micro-CHP (μ-CHP) Mk 4 unit. The model is based on empirical equations for different system characteristics (start-up, continuous operation and shutdown) developed using measured performance data. The model was implemented using MatLab program and its validation was undertaken against measured performance data from a unit installed in a dwelling under field trial in Northern Ireland. Given a heat demand profile for a domestic dwelling, the model can be used to predict the heat and electricity output. Using heat and electricity data for a dwelling over a period of 1 month, the model over-predicted the total electrical and thermal energy output from the μ-CHP unit by 1.4% and 4.2% respectively. The model predicted the electrical power output with a mean absolute error of 7.4% and a cumulative over-prediction of 4.7%. The thermal power output was predicted with a mean absolute error of 7.2% and a cumulative under-prediction of 3.7%. |
| Databáze: | OpenAIRE |
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