calculation method of photothermal energy storage conversion efficiency
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The photothermal conversion efficiency (η) was calculated according to Roper''s report (see Methods in the Supporting Information, Fig. S9) [42], which was 54.53% for G 2 PS–CS. It was 1.52 times higher than Cu 2 -x Se NPs (35.84%).
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Calculation of the photothermal conversion efficiency
Calculation of the photothermal conversion efficiency The photothermal conversion efficiency of the Cys-CuS NPs was determined according to the previous method. 1,2 …
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It should be noted that such high temperature is attributed to the photothermal conversion efficiency of TPP-2IND, as well as the low thermal conductivity of porous structure for thermal insulation. Meanwhile, the IR thermal images were taken by IR thermal camera and showed the distinct temperature changes of PU+TPP-2IND foam and the blank PU foam, …
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The photothermal conversion and energy storage efficiency η of PEG1, PEG2, PEG3 and PEG4 are calculated according to Formula (1). As shown in Table 5, the photothermal conversion and energy storage efficiency of the composite PCM (PEG0) reaches 0.752, while that of the composite PCM (PEG1) in the same content reached …
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To estimate the energy storage efficiency of PCCs, we define the photothermal conversion efficiency (η) in Eq. (1) . (1) η = m Δ H P Δ t where m and ΔH represent the mass and the melting enthalpy of the phase change composite, respectively; P is the solar radiation power and Δt is the time of phase change transition.
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In addition, the photothermal conversion efficiency of CA-SA/Nano-SiO 2 @LEW reaches 64.46 %, the energy storage capacity reaches 64.706 J/g, and the thermal stability is good. With these attractive features and an easily scalable manufacturing process, CA-SA/Nano-SiO 2 @LEW is considered to have great application potential in the field of indoor …
Photothermal Conversion
6.1 Principles. Photothermal conversion of solar energy, to produce hot fluid or hot air, takes place in solar collectors. Efficient conversion requires that a solar-absorbing surface is in thermal contact with the fluid or gas, and that thermal losses to the environment are minimized. The absorber should be positioned under a transparent cover ...
Energy Conversion Efficiency
Energy conversion efficiency is one of the key characteristics of energy systems. The definition of the energy conversion efficiency is the useful energy output (benefit) divided by the energy input (cost). Energy can be divided into quantity and quality terms. For electric power, quantity and quality are described by current and voltage ...
Calculation of the photothermal conversion efficiency
Calculation of the photothermal conversion efficiency. Where h is the heat transfer coefficient, S is the surface area of the container, and the value of hS is obtained from the Eq.4 and Figure 3b. The maximum steady temperature (Tmax) of the solution of the Cys-CuS NPs was 40.1 oC and environmental temperature (TSurr ) was 18.6 oC.