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Chemical Energy Systems Engineering Lab
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A lab that stores heat through chemical reactions so it can be used whenever it is needed.
AboutAbout the lab
Store, transport, and use heat.
The Kojima Lab studies technologies that make good use of heat through adsorption and chemical reactions.
The times and temperatures at which heat is released often differ from the times and temperatures at which it is needed, and this mismatch is one reason heat cannot be used effectively.
The lab works on chemical heat storage, which stores heat through chemical reactions and releases it when needed, and on systems that dehumidify and humidify using materials that take up water vapor.
Key terms
- Chemical heat storage
- A technology that stores heat as the energy of a chemical reaction and recovers it as heat when needed through the reverse reaction
- Desiccant
- A material, such as silica gel, that takes up water vapor. It is used to control the humidity of air
- Redox reaction
- A reaction in which substances exchange electrons. One example is a metal oxide binding with and releasing oxygen
NewsLab news
Paper on a medium-temperature chemical heat storage material published in Energy
Paper on a composite chemical heat storage material using MgSO4 published in Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers
Paper on Mg(OH)2/MgO-based chemical heat storage materials published in Journal of Energy Storage
Paper on a desiccant dehumidifier published in Renewable Energy
Paper on chemical heat storage materials for solar thermal power generation published in Energy
ResearchResearch themes
The lab studies advanced technologies for handling heat through adsorption and chemical reactions. It works on chemical heat storage, which resolves the mismatch in timing and temperature between heat sources and heat users, and on dehumidification and humidification systems that use adsorbents.
*Illustrative imageChemical Heat Storage and Heat Pumps
The lab studies chemical heat storage, which can resolve the mismatch in timing and temperature between where heat is produced and where it is used. In particular, it works on storing and using heat at high density: medium- to high-temperature heat at or above 500°C using redox reactions, and low-temperature heat at or below 100°C using the reaction between LiOH and water.
*Illustrative imageHumidity Control Systems Using Desiccants
These are systems that dehumidify and humidify through adsorbents such as silica gel and zeolite taking up and releasing water vapor. The lab develops energy-saving systems that use low-temperature heat to regenerate the adsorbent.
MembersFaculty
- Associate ProfessorYoshihiro Kojima
- Assistant ProfessorMitsuhiro Kubota
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Thermal Storage Tanks ( )” NAVFAC / CC BY 2.0 (cropped)
- Chemical Heat Storage and Heat Pumps: “Shell and Tube Heat Exchanger Piping 1” Ivangiesen / CC0 (cropped)
- Humidity Control Systems Using Desiccants: “White Silica Gel” Desiccants / CC BY-SA 3.0 (cropped)
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