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Research on the carbon emission benchmarking system of office building during usage phase
building carbon emission,building life cycle,building daily usage phase,building energy consumption,carbon emission benchmark system,
|Publication Year :||2019|
More than 80% of energy consumption in building life cycle is during daily usage phase, which is the main phase of carbon emissions of building life cycle. In this study, a building carbon emission benchmarking system was built to evaluate the carbon emissions during daily usage phase of office building. In this study, we try to achieve two main goal, the first is to estimate the energy consumption in a year by the design factors of office building, the second is to build a carbon emission benchmarking system to let the users easily know their building energy performance.
To estimate the energy consumption of office building, we try to collect the design factors of office building in Taiwan and combine with the calculation process in this study to estimate the building energy consumption of a whole year. The energy consumption in a typical office building includes: HVAC system, ventilation system, lighting, water pump, elevator equipment, and office equipment, these energy consumption items would be calculated and sum up to identify the energy performance. On the other hand, to provide a convenient benchmarking system, Neuron network prediction model was introduced in this study to let the users to get the HVAC system energy consumption in a whole year because of the complexity of estimating HVAC energy consumption compare to other energy demands.
To build up a benchmarking system, a baseline model was introduced in this study to evaluate the carbon emission performance of office building. Combining the building design factors and building regulations in Taiwan, we can build up a baseline building for every proposed building. And by the Ministry of Economic Affairs in Taiwan, we can get the coefficient of carbon emission to transfer the energy consumption to the amount of carbon emission. The ratio of the proposed building`s carbon emission and baseline building`s carbon emission is called Design and Baseline Carbon Emission Ratio (DBCER), and DBCER is used to evaluate the performance of the office building.
The results indicate that the lighting, office equipment and HVAC system each shares about 30% of total carbon emission in a whole year, and the other energy consumption items share about 10%-13% of the total carbon emission. The Energy Usage Intensity(EUI) value is between 50(kWh/m2) to 180(kWh/m2) generally in Taiwan. In the benchmarking system, Gamma distribution was used to fit the DBCER value, and the fitted curve was used to make a lookup table for the users to estimate their building energy performance by calculating the DBCER value and get the building score of the proposed building.
|Appears in Collections:||生物環境系統工程學系|
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