Energy simulations of buildings complement or replace the static calculations used so far and provide detailed answers to questions such as: what is energy demand for individual purposes in a building how does it change over course day, month, year also enable comparison several design variants selection optimal one terms consumption. Therefore, help make decisions optimise architectural instal...

We present a method of analysis for predicting annual performance of an in-situ photovoltaic (PV) array using short-term test data and an annual simulation tool. The method involves fitting data from a family of I-V curves (depicting current versus voltage) taken from a short-term test (1 to 3 day) of a PV array to a set of polynomial functions. These functions are used to predict the array’s b...

The application of computerised optimisation techniques to the design of low and netzero energy buildings would provide building designers with a powerful design tool. This paper presents such a tool that is being developed that links TRNSYS energy simulation with an optimisation program based on genetic algorithms. This early design stage optimisation tool optimises 17 parameters including bui...

This study compares the performance of five electrical water heater models in the TRNSYS environment. The main capabilities, modeling assumptions and performance of the models are first assessed using an intermodel comparison. The main criteria for comparison are: domestic hot water supply temperature, power demand (time-dependent profile and overall energy use) and vertical temperature distrib...