| 1. |
Hengxuan Wang, Daisuke Sumiyoshi, Evaluating the minimum introduction rate of electric vehicles (EVs) into houses to fully leverage photovoltaic (PV) generation at the street-level areas on urban scale, 14th International Conference on Power, Energy, and Electrical Engineering (CPEEE 2024), 2024.02. |
| 2. |
S. Kouroki, D. Sumiyoshi, Y. Choi, A study on the effect of facility renewal in small and mid-sized office buildings oriented to net-zero energy buildings-Measuring the effect of setting a cool space in summer-, Sustainable Built Environment Conference 2019 Tokyo: Built Environment in an Era of Climate Change: How Can Cities and Buildings Adapt?, SBE 2019 Tokyo, 2019.08, Recently, in Japan, ZEB has received attention since the need for energy self-sufficiency in buildings has been strongly recognized from the viewpoint of energy security. However, in small and mid-sized buildings with huge stocks, efforts are still small due to factors such as uncertainty in design methods and costs. In this paper, we verify the effect of cool spaces installed in entrances as one of the installation facilities applicable to small and mid-sized stock buildings. A summer experiment on cool space was conducted. From the questionnaire, we confirmed the improvement of thermal sensation and thermal comfort after entering an office room using a cool space. Moreover, using the operation data of air conditioning, the influence on the power consumption by installing a cool space was analysed. As a result, there was no reduction in the energy consumption of the entire building. However, in the office with a high cool-space utilization rate, we confirmed that the air-conditioning power consumption of the whole day has been reduced by 7.3%. These results show that cool space has the effect of improving comfort, and if more workers use it, an energy saving effect for the whole building can be expected.. |
| 3. |
Y. Inoshita, Daisuke Sumiyoshi, Y. Akashi, H. Kitora, Analysis of Heat Accommodation Effect in District Heating and Cooling Systems, Sustainable Built Environment Conference 2019 Tokyo: Built Environment in an Era of Climate Change: How Can Cities and Buildings Adapt?, SBE 2019 Tokyo, 2019.08, The purpose of this research is to investigate a method to improve the efficiency of heat source systems in two buildings by heat accommodation of cold/hot water between two facilities, and to clarify the energy saving effect. In this report, measured value analysis and simulation on the representative days are carried out. Heat source systems in two buildings located east and west across a road are targeted as the east district system and west district system. Overall, the equipment in the west area has better performance. First, the heat accommodation effect was verified by a measured values analysis. The analysis was carried out by comparing the representative days. Improvement of the east district SCOP was seen when remitting cold heat from the east district to the west district. In addition, it was confirmed that the heat recovery heat pump was operated by remitting hot water from the west district to the east district, and total SCOP of both districts improved. Next, efficiency is analyzed using a simulation model. We conducted a simulation to shift the load of each district and examined effective heat accommodation control. As a result of the simulation on the representative day, by remitting the load in the west district to the east district during the night and remitting the load in the east district to the west district during the day, heat recovery heat pump in the west district operated more, and the total SCOP of both districts improved. Examination by the measured value analysis and simulation showed that control to operate heat recovery heat pumps in the west area more is effective.. |
| 4. |
M. Kihara, T. Ikegami, D. Sumiyoshi, Y. Choi, T. Yamamoto, T. Ogino, Analysis of electricity usage habits based on electricity and hot water supply demand detail measurement of 10 houses, Sustainable Built Environment Conference 2019 Tokyo: Built Environment in an Era of Climate Change: How Can Cities and Buildings Adapt?, SBE 2019 Tokyo, 2019.08, In recent years, energy-generating devices such as residential use fuel cell cogeneration systems (FCCGS) have been spreading. A solid polymer electrolyte fuel cell (PEFC), which is a type of FCCGS, determines the amount of power generation and power generation time according to the demand for electricity and hot water supply in houses. Therefore, residents' lifestyle influences a PEFC's load following speed and efficiency. However, there are few actual surveys of household electricity and hot water supply demand, and we haven't fully grasped factors that affect them. Therefore, we aim to acquire home electricity and hot water usage habits that affect PEFC operation by measuring detailed electricity and hot water supply demand in 10 houses in Japan. In addition, we also conducted a questionnaire survey for the households and analysed the influence of resident's behaviour on demand for electricity and hot water supply. We can't see instantaneous changes in the amount of PEFC generated based on hourly data, so we measured the electricity consumption of the entire house and the electricity consumption and hot water consumption of each household appliance every 2 seconds. In this report, we analysed the usage habits of home appliances.. |
| 5. |
K. Takahashi, T. Ueno, D. Sumiyoshi, Estimation of time series urban energy demand and Examination of optimal energy supply system, Sustainable Built Environment Conference 2019 Tokyo: Built Environment in an Era of Climate Change: How Can Cities and Buildings Adapt?, SBE 2019 Tokyo, 2019.08, From the background of the liberalization of electricity and city gas retail market, it is considered that in the future Japan will move to a distributed supply form from each building and household. In order to properly place and operate this decentralized supply facility in the city, knowledge of time-series demand fluctuation in urban scale is necessary, but since there is no data or estimation method corresponding to this, it is necessary to develop one. In this research, we first developed a program to estimate the energy demand fluctuation at five-minute intervals of non-residential buildings in urban scale into four energy applications (electricity, cooling, heating, and hot water supply). First, we acquire the building information (usage, extended floor, and coordinates) of the target city by GIS (Geographic Information System) data. Based on this data, we predict the demand fluctuation by building as a reference. By distributing the value, using probability density based on statistical and measurement data, we reproduced the variation of demand due to the difference of building characteristics which cannot be obtained via GIS data. We estimate the demand fluctuation for a city by integrating the building-specific demand fluctuation estimation values. In this paper, the calculation was carried out using a program for Fukuoka city, Tenjin and Hakata districts, and the estimation result was compared and verified. Based on the data obtained by the urban energy demand estimation program, we will consider optimal placement and operation methods of distributed supply equipment typified by PV panel, cogeneration, and storage battery. By flagging the presence or absence of equipment for each building and calculating it, we compared and examined the amount of energy reduction in each pattern.. |
| 6. |
Y. Ikeyama, D. Sumiyoshi, Y. Choi, S. Tanoue, T. Shimoji, Study on energy education method for elementary school students to internalize energy conservation behavior, Sustainable Built Environment Conference 2019 Tokyo: Built Environment in an Era of Climate Change: How Can Cities and Buildings Adapt?, SBE 2019 Tokyo, 2019.08, In Japanese elementary school, there are few descriptions about energy in current school curriculum guidelines, and there is not adequate education on the energy that is the basis of the country. Therefore, in this research, the aim is to develop energy conservation environmental education materials that can be incorporated as elementary school classes, in order to establish the attitude of conserving energy conscious awareness and practicing energy conservation behavior. In August of 2018, under the cooperation of local community halls, energy conservation education was conducted for elementary school students who were recruited. Eight participants were divided into two groups, energy education using homebrew textbooks, making models of houses, etc., and classes on energy through discussion and presentation. As a result of the verification, this material is suitable for senior students over 3rd grade and the degree of difficulty is appropriate, and there is a possibility that it may be effective for consciousness formation of energy conservation, but the result of the level being too high for first grader of elementary school.. |
| 7. |
T. Ueno, K. Takahashi, D. Sumiyoshi, A Making method of Time-series energy demand data of non-residential buildings for urban energy analysis, 4th Asia Conference of International Building Performance Simulation Association, ASIM 2018, 2019.03, Urban energy supply systems are changing to distributed energy supply systems according to the spreading of renewable energy. In order to effectively arrange and operate distributed energy supply systems in the city, it is necessary to (1) predict energy demands for each use in each building, (2) consider operation technology such as interchange or storage, and (3) study on a city scale rather than a building scale. Therefore, we aim to construct a method to calculate the optimal energy supply system with renewable energy based on data from geographical information systems (GIS). This paper describes the development of an energy-demand prediction method for non-residential buildings and a demand analysis in Japanese business areas by using this method. For the demand analysis, we developed a method to predict the demand of electricity and heat (heating, cooling and hot water) of non-residential buildings for one year. This program fluctuations in demand by five-minute intervals depending on the type of buildings (office, hospital, hotel, store, restaurant and school), total floor area, outdoor air temperature and so on. The standard demand amount of each type of buildings is based on statistical data and measurement data about energy consumption of non-residential buildings in Japan. Furthermore the fluctuation method of the demand incorporates random number simulation and probability distribution to reproduce an actual fluctuation. We predicted and accumulated the demand for hundreds of buildings by three districts for the demand analysis in the whole district. One of these analyses showed that there are large fluctuations in the demand of each building, and these fluctuations decrease by grouping the buildings in the block. Moreover, we analyzed the gap of peak demand between aggregated individual buildings and districts. This analysis revealed that some of peak demand in districts are less than 40% of aggregated individual.. |
| 8. |
T. Doyama, M. Kondo, H. Imaoka, D. Sumiyoshi, H. Kitayama, J. Lim, Y. Akashi, Conduit Pressure Analysis and Renewal Effect of a District Heating and Cooling Plant, 4th Asia Conference of International Building Performance Simulation Association, ASIM 2018, 2019.03, The Seaside Momochi District Heating and Cooling (DHC) plant in Fukuoka, which has been operated for more than 25 years, directly uses seawater as heat source water. The current system COP is nearly 1.00, the improvement of which is a focal point in renewal of the DHC plant. The purpose of this study is, through renewal, to present a proposal for a new management and control method of DHC including customers as well as plants. For optimal plant control, energy loss in the whole system should be analysed in detail. In this study, as a kind of energy, pressure distribution is investigated in focus on regional conduit. First, for comprehension of renewal effect, the system COP after renewal is simulated. By optimization of the operation priority order, the system COP is calculated to be about 1.20 at least. Then, for water supply system, pressure loss inside regional conduit is calculated to be very small. By minimization of the energy loss including regional conduits and customer receiving facilities, the total pump water power could be reduced by more than 40 percent. This means that further consideration of supply pump control and system management would significantly contribute to effective energy saving.. |
| 9. |
Takahiro Ueno, CPASS -Carbon reduction Policy Assessment System for Sustainable city-, Research Exchange meeting between Chinese Culture University and Kyushu University, 2017.10. |
| 10. |
Hikari Aoyagi, The research on the residential block aiming at net zero CO2 emission, Research Exchange meeting between Chinese Culture University and Kyushu University, 2017.10. |
| 11. |
Ahmed Shahin, Integration of passive and active solar techniques towards developing a Zero-Energy Strategy for Egyptian office Buildings, Research Exchange meeting between Chinese Culture University and Kyushu University, 2017.10. |
| 12. |
Noriyuki Ueno, Development of the Functional Performance Test Method for Modular chillers, Research Exchange meeting between Chinese Culture University and Kyushu University, 2017.10. |
| 13. |
Noriyuki Ueno, Development of the Functional Performance Test Method for Modular Chillers, The 2nd Joint Workshop of Architectural Engineering, 2017.10. |
| 14. |
Ahmed Shahin, Integration of passive and active solar techniques towards developing a Zero-Energy Strategy for Egyptian office Buildings, The 2nd Joint Workshop of Architectural Engineering, 2017.10. |
| 15. |
Eriko Yoshimoto, A study on the residential block aiming at zero CO2 emissions, The 2nd Joint Workshop of Architectural Engineering, 2017.10. |
| 16. |
Daisuke Sumiyoshi, 他, Anti-Freeze and Energy-Saving Control Method of Ground Source Heat Pump System 他4編, Asim 2016, 2016.11. |
| 17. |
Takahiro Ueno, 住吉 大輔, 他2名, Development of General-Purpose Habitat System Model to Calculate Reduction Effect of Environmental Loads by Policies, The 5th IAEE (International Association for Energy Economics) Asian Conference, 2016.02. |
| 18. |
Yusuke Tai, Daisuke Sumiyoshi, et al., Fault detection method for heat source system using comparison between simulation and measured data
, ASim 2014, The 2nd Asia Conference of International Building Performance Simulation Association, 2014.11. |
| 19. |
Y. Nishina, Daisuke Sumiyoshi, et al., Development of a Simulator for Long-term Prediction of Urban Environmental Loads -Development of CO2 Unit model and Trial of Scenario-
, ASim 2014, The 2nd Asia Conference of International Building Performance Simulation Association, 2014.11. |
| 20. |
T. Suzuki, Daisuke Sumiyoshi, et al., Effects by Downsizing of Heat Source Equipment
, ASim 2014, The 2nd Asia Conference of International Building Performance Simulation Association, 2014.11. |
| 21. |
K.Nakaguma, Daisuke Sumiyoshi, et al., Effect of Energy Saving and Peak Power Reduction by Combination of Several Thermal Storage Methods -The formulation of the secondary side simulation model and the review of the method to operate the soil heat- storage system-
, ASim 2014, The 2nd Asia Conference of International Building Performance Simulation Association, 2014.11. |
| 22. |
H. Hassan, Daisuke Sumiyoshi, et al., Testing the Basements Thermal Performance as an Approach to the Earth-Sheltered Buildings Application at Hot Climates, Case Study(Egypt)
, ASim 2014, The 2nd Asia Conference of International Building Performance Simulation Association, 2014.11. |
| 23. |
Daisuke Sumiyoshi, et al., Performance Evaluation of the Automatic Optimization and Degradation Detection Tool for Chiller Plants, ICEBO 2015, International Conference for Enhanced Building Operations, 2014.9, 2014.09. |
| 24. |
Kasumi Nakaguma, Daisuke Sumiyoshi, et al., Effect of Energy Saving and Peak Power Reduction by Combination of Several Thermal Storage Methods -The formulation of the secondary side simulation model and the review of the method to operate the soil heat-storage system -
, The Yellow Sea Rim International Exchange Meeting on Building Environment and Energy 2014, 2014.02. |
| 25. |
Yuki Nishina, Daisuke Sumiyoshi, et al., Development of a Simulator for Long-term Prediction of Urban Environmental Loads and Prediction of CO2 Emission -Development of Predictive Models of CO2 Emission Intensity by Sector-
, The Yellow Sea Rim International Exchange Meeting on Building Environment and Energy 2014, 2014.02. |
| 26. |
Yusuke Tai, Daisuke Sumiyoshi, et al., The Detection Method for Sensor Error and Fault of Heat Source system Using Simulation
, The Yellow Sea Rim International Exchange Meeting on Building Environment and Energy 2014, 2014.02. |
| 27. |
Xin Zhi Gong, Yasunori Akashi, Daisuke Sumiyoshi, Energy performance of SOFC cogeneration system for residential buildings in Chinese cold areas, 3rd International Conference on Green Buildings Technologies and Materials, GBTM 2013, 2014.01, Primary energy reduction and energy efficiency improvement are important targets to be achieved in every society and in residential buildings in particular. an energy-efficient and low-emissions solid oxide fuel cell (sofc) cogeneration system is a promising electric and thermal energy generation technology for implementation in future residential buildings. this paper aims to analyze the energy performance in terms of primary energy demand and its reduction rate when sofc cogeneration system is used in residential buildings. this study outlines sofc cogeneration system and its simulation method, and then develops a standard family model for simulation under cold weather condition in china and selected beijing city as an example,and finally compares them with traditional power and heat generation system based on gas and electricity. the results show that sofc cogeneration system is an energy-efficient alternative power and thermal energy cogeneration technology for cold climatic cities such as Beijing, and can offer a large reduction rate (about 15.8% in winter) of primary energy demand in residential buildings. this study also finds that the significant reductions in primary energy demand of sofc system result for the periods with air temperature decreasing.. |
| 28. |
En Li, Yasunori Akashi, Daisuke Sumiyoshi, Jiaping Liu, Yanfeng Liu, Energy consumption analysis of house in Lhasa based on survey and simulation, 12th Conference of International Building Performance Simulation Association Building Simulation 2011, BS 2011, 2011.12, Along with the living standard enhancement, the family energy consumption of Lhasa had a large-scale expansion. By the surveys, the typical indoor thermal environment of the residential buildings showed that the existing residential buildings used passive solar design spontaneously. However, it still needs improving. Considered that Lhasa was categorized into heating area in 2008, it faces the problem of huge increasing of the heating energy. The basic simulation models were established for in-depth understanding the family energy consumption. The result will support the next study of energy saving building for the sustainable development of the city by specific passive/active design.. |
| 29. |
Initial Commissioning of Heating and Cooling Plant System
Part7 Revision of the Simulation Model and Development of control logic to improve system performance. |
| 30. |
Development of automatic optimization and degradation detection tool in heat source system of air-conditioning system. |
