Software Development Of A Simplified Calculation For Building Energy Consumption (SCBEC)

In the area of building energy conservation, the simulation of energy consumtion plays an important role. Currently, there are several methods and softwares to calculate building energy. The static methods include Degree-days and BIN methods, and the softwares that are using dynamic methods include DOE-2, EnergyPlus, eQUEST, and DeST. These results generated from the softwares are not accruated enough, and besides, the calculatione period is rather long, let alone the users needs special raining before using.Considering this, in this paper, another new method of building energy simulation is discussed, namely a simplified whole year building energy consumption method developed on the basis of a German building standard DIN V 18599. A building energy simulation software named SCBEC (Simplified Calculation for Building Energy Consumption) is developed under the theory of the simplified method to make the software user friendly and fast, and above all, applicable to the domestic building energy simulation.Firstly, the building energy calculation theory is elaborated from the mathematics angles, and the structure of the German building standard DIN V 18599 is discussed. It is pointed out that the German standard includes the calculation methods of lighting, energy needs for heating and cooling of building zones, delivered energy for ventilation systems, delivered energy for heating systems, delivered energy for domestic hot water system. Calculation methods of every type of energy are fully discribed, and some dedails is compared with some domestic building energy conservation standard.Secondly, after comfirming the calculation theory, the software requirements is analyzed and the chosen programming language is VB.NET and the chosen programming environment is Visual Studio 2005. After analyzing the structure and parameters of the software, the calculation formula in DIN V 18599 is translated into flow chart as the foundation of software programming.Thirdly, the programming of SCBEC is finished according to the flow charts and formulas. The function and structure of SCBEC is introducted. And an example file is listed to explan the operation of the software and the notification while using the software. Finally, SCBEC is used to calculate the energy consumption of an existing buiding in Tianjin. And at the same time, the energy consumption of the same building is calculated using the most widely accepted building energy simulation software EnergyPlus. And simulation the results of the two software is then compared with each other to analyze the reason of the difference.