Radiative cooling materials are expected to contribute to saving energy and preventing global warming because they reduce the internal air-conditioning load when used on the exterior walls of buildings, car bodies, etc.
Special Feature 3: Developing Radiative Cooling Materials that Enable Zero-Energy Cooling During the Day
Technology that Contributes to the SDGs
Innovation by the Daigas Group
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“Radiative cooling” refers to the cooling effect when heat on earth is released into space as a kind of light called thermal radiation.* This effect is well known as the reason temperature falls at night, but in fact, it also occurs during the day. During the day, however, the temperature of metal and concrete rises above the ambient temperature because the heat energy input from sunlight is greater than the energy radiated through thermal radiation. Traditional methods of combating heat generally relied on the use of materials to block light, paints that reflect solar radiation, etc., but although these methods limited the increase in temperature by blocking light and reflecting sunlight, the materials themselves absorbed heat and became warmer than the ambient temperature. At Osaka Gas, we focused on the fact that the temperature of a material will be cooler than surrounding temperatures if the energy radiated is greater than the heat energy input. As a result, we succeeded in developing radiative cooling materials that utilize our expertise in optical and thermal radiation controls. It has been confirmed that the temperature of these materials falls to 2 - 6℃ lower than the ambient temperature, even under direct sunlight. Going forward, we intend to test the durability and other aspects of these materials.
- * Thermal radiation: A phenomenon whereby heat from a heated substance is released as electromagnetic waves (light).
- Sustainability of
the Daigas Group -
President's Commitment
Transition Finance
- Values and Sustainability Promotion of the Daigas Group
- Daigas Group's Values Daigas Group Charter of Business Conduct and Management Policy Daigas Group Code of Business Conduct Sustainability Promotion System and Management Stakeholder Engagement Initiatives the Daigas Group Participates In Commendation from the Outside
- Sustainability Management and Value Creation Process
- Value Creation Process of the Daigas Group Long-Term Management Vision 2030 Medium-Term Management Plan 2023 Daigas Group Carbon Neutral Vision
- Actions on Materiality
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Materiality of the Daigas Group
Materiality Review Cycle
Creating Value for Customers
(Charter I) Contributing to the Sustainability of the Environment and Society
(Charter Ⅱ) Engaging with and Contributing to Society (Charter Ⅲ) Respecting Human Rights
(Charter IV) Complying with Laws and Regulations (Charter V) Providing Work Environment That Supports Employees’ Personal Growth (Charter VI)
- Corporate Governance
- Corporate Governance Risk Management Compliance Messages from Outside Directors
- FY2022 Activities Report
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- Creating Value for Customers (Charter I)
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Charter I Index
Management for Creating Value for Customers
Safety and Security 1:
Procurement Stage Safety and Security 2:
Processing Stage Safety and Security 3:
Distribution Stage Safety and Security 4:
Consumption Stage Incorporating Customer Opinions Proposing New Value
- Contributing to the Sustainability of the Environment and Society (Charter Ⅱ)
- Charter Ⅱ Index Management toward Contributing to the Sustainability of the Environment and Society Environmental Management Environmental Management: Indicators, Targets and Results Actions for Climate Change: Recognition of and Action on Risks and Opportunities Actions for Climate Change: Method to Evaluate Effects of CO2 Emissions Reduction Actions for Climate Change: Working to Reduce CO2 Emissions in Business Activities Actions for Climate Change: Working to Reduce CO2 Emissions at Customer Sites Efforts in Resource Recycling Conserving Biodiversity Developing Environmental Technologies Addressing Environmental Risk Promotion of Green Purchasing Environmental Communication
- Engaging with and Contributing to Society (Charter Ⅲ)
- Charter Ⅲ Index Management of Engagement with and Contribution to Society Activities for Promoting Communication with Society Corporate Volunteering Activities under the Small Light Campaign Social Contribution Activities Activities at Osaka Gas' Foundations
- Respecting Human Rights (Charter IV)
- Charter IV Index Status of Management regarding Respect for Human Rights Human Rights Due Diligence Action on Human Rights
- Complying with Laws and Regulations (Charter V)
- Charter V Index Management for Complying with Laws and Regulations Compliance Promotion Efforts Efforts for Protection of Personal Information Information Security Consultations and Reports from Partner Companies
- Providing Work Environment That Supports Employees’ Personal Growth (Charter VI)
- Charter VI Index Status of Management to Support Employees' Personal Growth Employment Acceptance of Diversity Balancing Work and Family Human Resource Development and Rewards Communication Between Employees and Company Improving Occupational Health and Safety
- Reporting Guidance and Guidelines and ESG Data
- Reporting Guidelines