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Abstract A new energy-saving wall materials database was established based on the records of the construction administration. Through the analysis of the data, it was found that most of the new wall materials had fall out by the market selection since 1994, and the large scale constructions had more will to use new energy-saving wall materials than the will of small scale constructions. The database had also created a visualization application based on GIS to help the administration to make the policy more comfortably. © 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of [name organizer] Keywords:Energy-saving, Construction wall material, Data analysis, Policy 1. Introduction A special administration named wall-Material-Reform-Administration (WMRA) was founded in Hangzhou at 1996, to develop the make plan and policy for the new wall materials, and to terminate and supervise the use of the clay brick. This administration has conational records of the construction wall material using, and trough full analysis of this data administrators and researchers can have a more clear policy roadmap. Under the commission of WMRA, Zhejiang University City College has sorted and found the Hangzhou energy-saving wall materials database and made a visualization application of the database. 2. Energy-saving wall database 2.1 Database construction The new wall materials database was based on the WMRA’ records including the project overview, date, constructor, designer, builder, amount of the new material species and the total amount of the wall construction material. It was found that data integrality was not the same for different era. Also there was dissension in the definition of the new wall material for different period. In order to keep the database © 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of the organizing committee of 2nd International Conference on Advances in Energy Engineering (ICAEE). structures complete and stable while maintaining original appearance, it was necessary to add some reasonable analysis for the database framework design and data selection. The original data from WMRA is very complicated, consisting of special fund receipt, record form, inspection report, budget plan& final report and purchasing receipt. Based on the application requirement, the original data is pided into three different sheets: material sheet, project sheet and history sheet. 50135
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The material sheet provides the physical property, thermal testing data and construction technology of the new wall material. Project and history sheets provide the historical variation of the production, performance of the product and the price. By numbering the different materials, all these data are combined into one database system. 2.2 Data collection and Checking As the source of the original data is complicated and style of the data is persified, all the work such as data collection, arrangement and import should be done manually. The department in charge arranged manpower to copy, sort out and import all the relevant original data for the last fifteen years. The next step is database construction which can be pided into three parts: data collection and recording, imported data checking and GIS management. As the WMRA was strict on the process of checking and recording the new wall material as well as censoring the performance of the product, original data checking was excluded from the process. In order to keep the data complete and objective, only the new wall materials with completed history of payment, censor and refund were recorded while the others were discarded. There were two teams working for the project. The first one finished data arrangement and data import. The second one completed database testing as well as data arrangement, then they submitted preliminary analysis to the relevant administration for the policy development. Through one year’s hard work, Hangzhou’ new wall materials database was successfully built. 2.3 Data Analysis All the completed payment records for 739 projects, from 1994 to 2010, were recorded in this database system while the other uncompleted ones were discarded. The statistic table for every year’s usage was shown in table 1. The usage ratio of the new wall material was decreased firstly and then increased gradually. This trend matched the process of the new wall material standard identification. The clay brick was widely used between 1997 and 2000 while the usage ratio of the new wall material was lowest at that time. But after 2000, it was found that Hangzhou tried to reduce the clay brick and develop the new energy-saving materials. (Fig. 1) In the process of the promotion of the new wall material, a lot of new species came out as the techniques developed. However some were eliminated by the market. From the statistics usage ratio in Fig. 2(a), there were about 6 new species every year in Hangzhou between 1994 and 1997 and the major class was brick. The construction account number was 12 between 2001 and 2005 and then became 6 after 2008.