passive solar systems such as solar chimneys need solar radiation in order to work. therefore, they cannot present stable natural ventilation when solar energy vanishes: to have a more robust and stable condition, solar energy should be stored during the day and released back during the night. phase change materials can save additional thermal energy during the day and release it during the nig...

To realize the lagging behavior in heat conduction observed in these two decades, this paper firstly theoretically excludes the possibility that the underlying thermal inertia is a result of the time delay in heat diffusion. Instead, we verify in experiments the electro-thermal analogy, wherein the thermal inertial is parameterized by thermal inductance that formulates hyperbolic heat-conductio...

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The increasing share of renewables in energy systems requires storage technologies to handle intermittent sources and varying sinks. Liquid air (LAES) is a promising technology since it has high density not geographically constrained. A relatively round-trip efficiency (RTE) obtained by using hot cold recovery cycles the LAES. In this work, seven cases related different are optimized compared f...