Environmental Design
Environmental Design
DAIKEN SEKKEI environmental effort
DAIKEN SEKKEI's corporate mission is to help in the fight against climate change on a global scale, and we promote various initiatives to that end. In addition to these efforts, we also offer a variety of solutions with the latest in environmental technologies to achieve comfortable spaces while maintaining affordability. In addition to support during construction, we also provide support for various performance verification procedures (commissioning) in the operation phase, use of environmental-related systems, and application for subsidies.
We provide multifaceted support to meet client needs in a wide range of fields by providing consulting with our expert engineers, who are familiar with the latest technology in environmental equipment and possess extensive know-how from previous projects. In addition, we utilize our design experience on energy-saving projects to urge for the conversion of buildings to ZEB through multifaceted approaches.
Toward realizing carbon neutrality
Efforts Towards ZEB (Net Zero Energy Buildings)
Environmentally friendly wood architecture
CASBEE and BELS certifications acquired
Green Renovation Projects
Environmental Study/Analysis
Operational Support
DAIKEN SEKKEI has accumulated a wealth of experience in overseas projects.
DAIKEN SEKKEI supports our clients’ eco-friendly business management. Global warming is accelerating, causing extreme weather events and ecological impacts worldwide.The construction industry now accounts for about 1/3 of total CO2 emissions, and we understand that making every effort to mitigate global warming is our urgent mission.
Japan has set a goal to reduce greenhouse gas emissions by 46% below 2013 levels by 2030 based on the Act on Promotion of Global Warming Countermeasures, together with a further goal of reducing emissions to net zero and becoming carbon neutral by 2050. Furthermore, the national basic energy plan sets forth that "the goal is to ensure energy efficiency performance at the level of ZEH and ZEB standards for houses and buildings which will be newly constructed after FY2030, and to ensure energy efficiency performance at the level of ZEH and ZEB standards as the average for all of the existing houses and buildings by 2050."
Roadmap
To overcome this pressing issue which can no longer be ignored, DAIKEN SEKKEI is making use of the various environmental technologies which we have developed, to maximize the environmental asset value of clients’ buildings.
We Provide Comprehensive Environmentally-Conscious Technology
Environmentally-Conscious Architecture Examples
Example: Aichi Gakuin University Meijo Campus
From CASBEE evaluation results
Environmentally-conscious construction was adopted and natural/unused energy was thoroughly utilized, with the goal of turning the university facilities into a low-carbon model campus. Planning, verification, and technology development were conducted by a team including academics, designers, fabricators, energy companies, and others.
- Thorough use was made of Low-E glass
- Use of energy cascades from exhaust air from common spaces
- Induction radiant climate control
- Control of solar radiation with horizontal eaves
- Automatic light control external blinds
- Installation of high-efficiency devices
- Energy monitoring systems
- High-efficiency lighting
- Motion detecting sensor flash control in common spaces
- Solar power generation capacity
earning an S rank (BEE: 3.2) from CASBEE Nagoya. The project also received numerous environmental awards.
- Environment Minister's Award for Global Warming Prevention Activity
- The 5th Sustainable Campus Award
- Energy Conservation Grand Prize (Best Practice Category)
- The 31st SHASE Technology Promotion Award
- The 6th Carbon Neutral Award
- The 3rd Nagoya Good Green Award, awarded in the Business Category
Our efforts at DAIKEN SEKKEI
Since September 2022, we have been purchasing carbon neutral LNG as the main energy source for the DAIKEN SEKKEI Osaka Building.
Efforts Towards ZEB (Net Zero Energy Buildings)
What is ZEB?
Without degrading the quality of the internal or external environment, ZEB buildings achieve broad energy savings through load reduction, use of natural energy, increasing facility system efficiency, and others, while introducing sustainable energy to result in a zero or net positive (supply > demand) annual accumulated balance of energy supply and demand during building operation.
*ZEB is an acronym for Zero Energy Building
ZEB Initiatives (ZEB Planner Registration Number ZEB29P-00103-CP)
DAIKEN SEKKEI has a department for environmental technology patents, and believes in contributing to climate change mitigation on a global scale and helping clients reduce energy consumption and emissions of CO2 and other greenhouse gases as a company mission. In order to use our experience with energy consumption reduction design to become involved in a large number of ZEB projects, we are expanding the ZEB retrofitting of buildings using mainly the following approach.
- Explain the importance of ZEB to building owners who are unfamiliar with the concept of ZEB.
- Explain the merits of ZEB retrofitting from the perspective of building asset value and environmental improvement value.
- Plan the building based on the given conditions, and explain the investment cost, energy-saving effects, ROI, etc. to the building owner.
- Compile a total overview of the workflow, including detailed site surveys, designs, design cost estimates, and application forms, in preparation to apply for subsidies.
New government building and disaster management base facility in Matsuno Town (Nearly ZEB)
This facility was designed to symbolize Mori no Kuni Matsuno ("Matsuno, the Land of Forests") with a wood structure (a rigid-frame structure of laminated wood + CLT load-bearing walls) using Matsuno cedar and a wood interior using cypress. In addition, the building achieved a primary energy consumption reduction rate of 81% (a BEI value of 0.19) by acquiring a "Nearly ZEB" certification and a 5-star rating under BELS, achieving top-class environmental performance among government buildings. Furthermore, by utilizing the Ministry of the Environment's FY 2020 subsidy for CO2 emission control measures, the total construction cost of the new government building was reduced by approximately 12%, contributing to a reduction in the financial burden on the town.
- < Main energy-saving technologies >
- High-performance outdoor air conditioner unit (EHP multi air conditioning system)
- Total heat exchange ventilation fan
- LED lighting (lighting control)
- Floor air-conditioning, cool (heat) pit
- Photovoltaic power generation system (80kW), lithium-ion storage batteries
- Low-E double-glazing glass
- High insulation (roof, exterior walls, and under the first floor slab), louvers, eaves
Administrative Wing of the Aichi Gakuin University Meijo Koen Campus(ZEB Ready)
In 2018, a successful application was made for a subsidy for promoting energy consumption reduction investments (project for promoting the introduction of innovative energy saving technology in housing and other buildings) (pilot project for Net Zero Energy Buildings)
- < Main energy-saving technologies >
- solar panels
- other solar shading, Low-e multi-layer glass
- cool tubes, heat tubes
- multi air-conditioner for buildings (EHP)
- package units
- outside air cooling systems
- ice thermal storage systems
- radiation rectification blowout systems
- LED lighting, brightness detection control systems
- occupied room detection control systems
- time schedule control systems
SANKO Co., Ltd Tokushima Plant (ZEB Oriented)
- < Main energy-saving technologies >
- Double-glazing glass
- Roof insulation (GW1100t)
- High-efficiency air-cooled heat pump package unit air conditioner
- Total heat exchange ventilation fan
- Automatic hot water taps
- LED lighting
- Variable voltage and frequency control system for elevators and escalators
ZEB Feasibility Study (Osaka Prefectural Suita Higashi High School)
Major Energy-Saving Planning Performance Record
Project for Construction, Operation, etc. of Aichi Prefecture's New Gymnasium
2022 "Plan for Securing Energy Consumption Performance of Buildings Pursuant to Article 12, Paragraph 1 of the Act on the Improvement of Energy Consumption Performance of Buildings" (Maeda Corporation, Kengo Kuma & Associates, DAIKEN SEKKEI Inc.)
- < Main energy-saving technologies >
- Double-glazing glass
- LED lighting
- total heat exchangers
- motion sensors
- high-efficiency air conditioners
- CO2 control
- VAV/VWV control
- micro-cogeneration waste heat recovery
- motion sensor and daylight sensor schedule control
- 100kW solar power generation
Shin-Tsurumaru Building
2019 "Plan for Securing Energy Consumption Performance of Buildings Pursuant to Article 12, Paragraph 1 of the Act on the Improvement of Energy Consumption Performance of Buildings"
- < Main energy-saving technologies >
- Low-E double-glazing glass
- LED lighting, daylight dimming sensors, room presence sensors
- air conditioners, radiation air conditioning (concealed package + radiation panel), total heat exchangers, partially desiccant air conditioning
ZEB Consultation Help Desk
Supervising Office: Headquarters Design Center. Representative: Tomiya
※For ZEB-related inquiries, please use the contact form below.
Environmentally friendly wood architecture
DAIKEN SEKKEI's Large-Scale Wooden Architecture
We have a diverse history of large-scale wooden buildings, including halls, domes, and gymnasiums, and continue to create wooden structures tailor-made according to the characteristics of each project by making full use of fire-resistant wooden, components, laminated heavy timber, CLT, and other materials.By designing buildings that make use of the wood’s softness, we create buildings imparted with the positive qualities of ancient Japanese wooden architecture that lead the way to the next generation.
The world's largest wooden concert hall
Japan's first large-scale wooden dome with a single-lattice arch structure
A heated swimming pool with wooden beams Uses a wood pellet boiler as heat source
CASBEE and BELS certifications acquired
With these certifications, we will help to improve the asset value of your buildings and appeal to the value of environmental improvements.
Green Renovation Projects
Upgrading to higher efficiency heat source systems
When conducting point processing to select business operators to upgrade the heat source in large-scale building redevelopment projects, we conduct surveys on age-related deterioration as well as energy conservation evaluations of all facilities including the central heat source, followed by heat source comparison simulations, and implementation planning and supervision.
Environmental Study/Analysis
As part of the design process, air and water environments are analyzed using simulation technology to visualize and examine whether the environment can be controlled as intended. In ESCO project feasibility studies, an assessment of the current status is carried out including actual energy consumption measurements, followed by the listing of renovation items in the order of cost-effectiveness as part of a feasibility simulation of ESCO projects, such as those utilizing private funds.
Environmental Simulation
We verify through simulations whether air-conditioning of the occupied area in a large space is feasible, and then proceed to the implementation design.
The Beans Dome
Simulation Video
Airflow simulation results
Tennoji Zoo Penguin and Sea Lion Pool
Sea lion pool water flow simulation
Paper presented at the 2023 Conference of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan: ■ Investigation of Flow Efficiency in a Water Tank for Breeding and Exhibiting Animals using CFD Analysis
Case A-3 Conditions
- Artificial rocks are placed in the center of the pool (to be changed)
- The configuration of the nozzles has shifted even more, creating the overall image of a circle (to be changed)
- Recesses are located in the center near the artificial rocks (to be changed)
Case A-3 Results(Bottom of the water life pool + 1.5m)
- Stagnation near the quasi-rock area was eliminated.
- Unevenness in the whole area was eliminated
- Average water life has slightly improved
Simulation videos are used to verify the smooth flow of water and to determine the optimal placement of artificial rocks.
Video of poor water flow
Video of improved water flow
Operational Support
Commissioning (design verification)・Tuning
We verify the effect and performance of our design; emphasizing how the equipment could be operated as efficiently and reliably as possible.
Meijo Koen Campus, Aichi-Gakuin University
Visualizations of energy consumption results allow us to find areas of operation that can be improved and to speed up energy conservation through repeated tuning. In the cool pit, the humidity conditions used are appropriately reviewed to improve energy efficiency.
Verification through testing of air conditioning in occupied areas
After construction, we verify whether the intent of the design has been realized by testing the air conditioning in occupied areas using smoke tests and other means.
The Beans Dome
Verification video by smoke test(2X speed)
Long-Term Repair Plan Proposal
Preparing a long-term maintenance plan during the operating phase of a building to specify the intervals for replacing expendable items and inspecting/servicing equipment will enable proper maintenance at the appropriate timing.Efficient and well-planned investments contribute to the improvement of asset value. We save energy throughout the life cycle of a building through proper maintenance and efficient renewal work to extend its service life.
Examples of environmentally friendly architecture
「環境配慮建築の事例」の情報はありません
Services
Services offered by DAIKEN SEKKEI
In addition to the design work which forms the core of our business, we also offer a variety of other architectural-related services.