Development of test procedure for the evaluation of building energy simulation tools - phase III addition of subsystem test toward systematic diagnostics for HVAC system simulation-
Development of test procedure for the evaluation of building energy simulation tools - phase III addition of subsystem test toward systematic diagnostics for HVAC system simulation-
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开发用于评估建筑能源模拟工具的测试程序 - 第三阶段添加子系统测试以实现 HVAC 系统模拟的系统诊断 -
DOI:
10.26868/25222708.2019.210592
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Eisuke Togashi
中科院分区:
文献类型:
--
作者:
Sei Ito;E. Ono;H. Yoshida;H. Yamaguchi;Eisuke Togashi
This paper presents recent work to develop the test procedure for the evaluation of building energy simulation tool by a committee of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan (SHASE). The SHASE test procedure focuses on evaluating a tool’s capability of estimating thermal load and a HVAC system's energy consumption in commercial buildings, and its outline was presented at the BS2017 conference. In this paper, we report simulation trial results of additional test cases by several users and tools based on the improved and extended procedure. The test conditions of the thermal load simulation test were revised in order to specify modelling method more accurately and precisely for test participants. Test cases with new HVAC equipment and control strategy aiming energy conservation were added to the whole system test. The test results showed discrepancies in energy consumption between tools which is mainly caused by the difference in equipment characteristics, control logic modelling, and user’s human errors and interpretation in modelling. We are planning to update the guideline description and conditions taking these issues into consideration. Introduction Research on the methods of evaluation of building energy simulation tools has been carried out in NREL and IEA since 1980, and in 1995 the IEA BESTEST was developed (Judkoff and Neymark, 1995). A portion of the work was published by ASHRAE as Standard 140 (ASHRAE, 2017). However, the scope of this evaluation method was limited to a few HVAC systems, which do not cover the systems commonly used in Japan. In SSPC140 by ASHRAE a HVAC system evaluation method was developed to improve the Standard, but the focus was on checking the steady state heat balance (Neymark et al., 2017). Therefore there is no common procedure for evaluating the energy consumption for HVAC systems used in commercial buildings. While in Japan major amendment to the energy conservation law took place in 2015, and when applying for building approval it has become compulsory to state the annual energy consumption. This amendment led to a demand for a method of objective evaluation of the reliability of building energy simulation tools. Therefore in 2013 SHASE established a special committee to develop Japanese own test procedure for the evaluation method, and in 2016 a guideline for the evaluation method was published (SHASE, 2016). The contents of the guideline were reported at the previous conference (Ono et al., 2017). In this paper the following results of the continuing activities of the committee are described: 1) simulation trial results of base cases by several users and tools and revision of some test conditions, and 2) details of new enhanced additional test cases. Outline of test procedure The objective of this test procedure is to determine the reliability of energy simulation tools for HVAC systems including thermal load simulation, and to enable their use in the education and training of users in the use of these tools. The scope of this test procedure is limited to air conditioning systems and associated ventilation systems. Also, systems for residential buildings is outside the scope of this test procedure. Figure 1 shows the test case configuration and the outline of this paper’s contents. The parts shown in red characters are the main changes from the previous paper, and are described in detail later. From the point of view of simulation tool evaluation, the scope of this procedure is broadly divided into thermal load simulation and HVAC system simulation, and evaluation of each component and the overall system is carried out, with the objective of simplifying the identification of the cause and effect relationship. This paper describes 1) simulation trials of base cases which are whole building of thermal load simulation test and JE110 of HVAC system simulation test, 2) expansion of evaluation target for HVAC system simulation test, adding total heat exchanger for the equipment test and 6 cases of JE120 to JE240 for the whole system test, and 3) discussion about causes of the discrepancies. In the whole building test, calculations are performed for a building which has seven stories and total floor area of 10,000 m2 in Tokyo as shown in Figure 2. The heat source system is configured from air source heat pump/chillers (AHP1 and AHP2) and an absorption chiller (AR1) as shown in Figure 3. The HVAC system includes the AHU and VAV system shown in Figure 4. The air-conditioning periods are taken to be June 1st to September 30th for cooling, and December 1st to March 31st for heating. In the intervening periods it is envisaged that the HVAC system is stopped. For the detailed calculation conditions that are not reported here, refer to the previous paper. ________________________________________________________________________________________________ ________________________________________________________________________________________________ Proceedings of the 16th IBPSA Conference Rome, Italy, Sept. 2-4, 2019 4578 https://doi.org/10.26868/25222708.2019.210592 The following is a description of the conditions and the trial results for each test case. Table 1 shows an overview of the tools used in the simulation trials. Note that the simulation trials u sing NewHASP, LCEM and BEST were not conducted by these program authors but by just users, and the results were not verified by the program authors. Figure 2: Standard floor plan of the whole building test. NWP NEP Office 1 NP
影响因子:
2.5
作者:
森山大輝;大西康伸;藤田真衣;藤岡泰寛・磯崎透子・大原一興;Togashi Eisuke
通讯作者:
Togashi Eisuke