In our case, the Duplicable City Center basement, Earthbag Village (Pod 1) living structures, Tropical Atrium, and Aquapini and Walipinis structures are all designed for in-ground construction. Understanding how this works and how it relates to thermal lag is especially helpful in the case of in-ground structures and/or construction of Climate Batteries. Thermal mass can be used to store heat when it is warm so that that energy can then be released/used when temperatures drop. Thermal mass and thermal lag are particularly useful where there is a big difference between day and night outdoor temperatures. The better the thermal mass is at holding heat from the hotter parts of the day, and the less extreme the ambient temperature fluctuations are, the slower the thermal lag and the easier it is to regulate temperatures within structures by understanding and using both thermal mass and thermal lag. Thermal lag will then depend on the effectiveness of the thermal mass and how extreme the ambient temperature variations are. Moderate thermal conductivity – so the rate that heat flows in and out of the material is roughly in sync with the daily heating and cooling cycle of the building.A high density – the denser the material, the more heat it can store.A high specific heat capacity – so the heat energy/kg is maximized.So thermal mass is a material that stores energy and how long that energy is able to be stored as surrounding temperatures change is called thermal lag.įor a material to provide appropriate levels of thermal mass, a combination of three basic properties is required: Thermal lag is the name given to the delay in the stored heat being released from the material as the ambient temperature decreases. Thermal mass is a material’s resistance to change in temperature and the ability to absorb and store heat energy. RELATED PAGES (click icons for complete pages) Building Above Ground Versus Underground Case Study.Understanding Temperatures Around the Year.Understanding Heat Conductivity of Soils.Understanding Heat Conductivity of Materials.In accordance with our open source philosophy and desire to help others interested in sustainable building too, we share here the results of our research into this topic with the following sections: These are helpful to understand for any in-ground constructions and, in our case, this includes the Duplicable City Center basement, Earthbag Village (Pod 1) living structures, Tropical Atrium, and Aquapini and Walipinis structures. This page is about understanding thermal lag and thermal mass.
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