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      THE IDEALIZED AND THE REALISTIC VALIDATION STUDIES OF BUILDING SIMULATION MODELS IN GHANA

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          ABSTRACT

          The research is based on the premise that in order for a building energy model to contribute to a sustainable energy future, the model’s accuracy must be ensured in order for the model’s results to be trusted. Therefore, validation processes in continuing Ghanaian building performance studies are outlined. The process started with long-term monitoring of low-rise, multi-storey and test cells structures. Combined with weather data from meteorological offices, reliance on synthetic weather files and local measurements, appropriate matching periods of weather data and measurements were used to simulate indoor parameters. Further, the simulated and measured data were in good agreement in terms of regression values (r 2of 0.53–0.96). Energy use bills were used to validate energy loads of a multi-story building which resulted in a difference of 0.09% between the simulated and billed data. Furthermore, an approach of using the Coefficient of Variance for Root Mean Square Error (CV (RMSE)) was also presented. Considering the range of the regression values which could be due to the difficulty in the validating process; one can confidently rely on the outcome to predict building performance. Sampled challenges are the potential of synthetic weather files to overlook microclimatic conditions such as urban heat island effects; difficulty in predicting internal loads as comprehensive monitoring devices are lacking, e.g., occupancy sensors to monitor the actual number of people present at a time and their behaviour within spaces; system performance values which are known to decline with time, therefore, affecting measured versus simulated values; most firms not keeping energy bills and their unwillingness to provide the information to researchers; etc. The validated models can be used as scientific-based data and analysis to inform building designers decisions to reduce the economic and environmental burden in Ghana.

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          Do LEED-certified buildings save energy? Yes, but…

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            User behavior in whole building simulation

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              Is Open Access

              Validation of Calibrated Energy Models: Common Errors

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                Author and article information

                Journal
                jgrb
                Journal of Green Building
                College Publishing
                1943-4618
                1552-6100
                Summer 2022
                10 October 2022
                : 17
                : 3
                : 141-160
                Author notes
                [1.]

                Department of Architecture, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana

                [2.]

                Department of Construction Technology and Management, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana

                Article
                jgb.17.3.141
                10.3992/jgb.17.3.141
                384ecb28-8304-49c3-93bb-6b84ced39112
                History
                Page count
                Pages: 20
                Categories
                RESEARCH ARTICLES

                Urban design & Planning,Civil engineering,Environmental management, Policy & Planning,Architecture,Environmental engineering
                simulation,building performance,energy use,temperature,validation

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