Development and Analysis of Decc (Data-Base for Energy Consumption of Commercial Building)

Abstract

The number of commercial buildings in Japan is estimated over 10 million and these buildings are considered to emit large amounts of CO2. However, environmental load for commercial buildings has not been fully researched and those researches done in the past have focused on limited subjects or areas in Japan. This research aims to develop a nationwide database on CO2 emission and water usage of commercial buildings which can be used by researchers, policy makers and business people. This paper reports the outline of this database and the specific primary energy consumption, which was developed centrally by 33 universities. The data was collected through questionnaire surveys which was conducted between 2007 and 2009, and a total of 40,085 building data was collected, of which 27,902 were disclosed. The collected data was divided into 23 uses and primary energy consumption intensity for the disclosed database were calculated by areas, gloss floor area and year of completion. The number of commercial buildings in Japan is estimated over 10 million and these buildings are considered to emit large amounts of CO2. However, environmental load for commercial buildings has not been fully researched and those researches done in the past have focused on limited subjects or areas in Japan. This research aims to develop a nationwide database on CO2 emission and water usage of commercial buildings which can be used by researchers, policy makers and business people. KeywordsThis paper reports the outline of this database and the specific primary energy consumption, which was developed centrally by 33 universities. The data was collected through questionnaire surveys which was conducted between 2007 and 2009, and a total of 40,085 building data was collected, of which 27,902 were disclosed. The collected data was divided into 23 uses and primary energy consumption intensity for the disclosed database were calculated by areas, gloss floor area and year of completion.

Energy-Efficient Retrofitting under Incomplete Information: A Data-Driven Approach and Empirical Study of Sweden

“…In total, 1,066,891 samples are available in this dataset till now, and a majority of them are commercial and residential buildings. Other BPDs include the Database for Energy Consumption of Commercial buildings (DECC) in Japan [57] and the Building Occupants Survey System (BOSSA) in Australia [58]. The proposed data-driven approach is able to support the building retrofitting decisions based on the above BPDs.…”

Analysis on building envelope and building service equipment design specification using the input and output data from the calculation program to confirm compliance with building energy code (part 1): Identification of the design specification for newly built offices in Japan according to the evaluation result of the building energy code

“…In Japan, there was a movement in the 2000s to conduct a comprehensive survey of a broader population with the participation of the government, rather than the conventional questionnaire survey of a limited number of people related to academic associations. The study began for the purpose of uniting industry, government, and academia to build a statistically reliable environment and energy‐related database 18 . The results of this study were published in the Database for Energy Consumption of Commercial Buildings (DECC), and there are many reports on the results of analysis of energy consumption rates, etc., using this data 19‐21 .…”

“…The study began for the purpose of uniting industry, government, and academia to build a statistically reliable environment and energy‐related database 18 . The results of this study were published in the Database for Energy Consumption of Commercial Buildings (DECC), and there are many reports on the results of analysis of energy consumption rates, etc., using this data 19‐21 . This information is being used in consideration of energy efficiency policies, such as the revision of energy efficiency standards.…”

“…Note 12) Note 12) The inputs for the building envelope in the Model Building Method that affect BEIm/AC are the perimeter length of the building envelope, the perimeter length, and orientation of the non‐air‐conditioned core, the area, and average thermal transmittance of the exterior walls and roof, the area, and average thermal transmittance of the windows, and the solar heat gain coefficient. The Model Building Method assumes a “model building” for evaluation, with a predetermined building shape, room use composition, etc., and the building envelope area ratio (building envelope area per floor area) and window area ratio of the model building are adjusted to match the envelope area ratio and window area ratio of the building under evaluation 21 …”

Development of building thermal environment emulator to evaluate the performance of the HVAC system operation

“…*Email: e.togashi@gmail.com; miyata-m92ta@mlit.go.jp Energy consumption during the operational phase is significantly affected by building use and the manner in which the heating, ventilating, and air conditioning (HVAC) system is operated. Therefore, even in buildings of similar applications and sizes, actual energy consumption varies widely (see survey data by Takaguchi et al 2012). Thus, stabilizing the operation of the HVAC system controller can potentially result in lower, more stable energy use.…”