2.2.6. The tools that support the calculation of energy contain worksTo facilitate the calculation of energy contain of construction works may use software support is the model building energy analysis as: TRNSYS, EQUEST, HEED, ENERGY PLUS. The pattern of energy (Energy Modeling) is the simulation or using computers to simulate a building, focused on the issue of energy consumption, energy costs and costs related to the life cycle the system power consumption such as air-conditioning, lighting and hot water supply. Energy models are also used to evaluate the return of green energy solutions like solar panels and wind turbines, photovoltaic equipment and high energy efficiency. However the above mentioned energy model is the software is hard to use, complex interface along with the requirements for high professional level when using.2.3. The proposal to apply the appropriate calculation method to calculate the energy which worksThe energy function of a construction works is calculated based on the energy consumption of all the processes related to the building of a construction works, from the extraction and processing of natural resources for the production, transportation and coordination of construction materials to the necessary power of machinery and equipment in construction process. Not contain energy includes energy for the activities in the process of operation and handling building materials after demolition works [22]. So can calculate the energy which works based on 5 main stage the following (see Figure 2-1, source: [20]):
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