Experimental Analysis of a Gas Micro Cogeneration Based on Internal Combustion Engine and Calibration of a Dynamic Model for Building Energy Simulation
Internal combustion engine (ICE) based micro cogeneration (uCHP) covers a wide range of capacities and recent developments increased the efficiency through condensing exhaust device and variable speed pumps. This type of equipment is suitable for residential and commercial buildings and is usually integrated in a system with back up boiler. A dynamic model is required to investigate the seasonal energy performance of these equipments. A generic grey box model with few and easily accessible parameters has been developed to simulate the dynamics of the heat and electricity productions of an ICE based uCHP. The unit under scope develops an electrical power of 7.5 kW and a thermal power of 20 kW. The test facility is described and the uncertainty of the measurement chain is assessed. The static and dynamic parameters of the micro cogeneration model have been identified based on a set of experimental data representative of all operating conditions. The model will be used to undertake building energy simulation studies in various cases such as collective housing, commercial buildings, hotels to identify the optimal sizing of components (uCHP, back up, storage) and controls for various tariffs (self consumption, feed in, sale back)