Natural Resources

Volume 5, Issue 12 (September 2014)

ISSN Print: 2158-706X   ISSN Online: 2158-7086

Google-based Impact Factor: 0.89  Citations  h5-index & Ranking

Measurement of Thermophysical Property of Energy Storage System (CaCl2.NH3 System)

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DOI: 10.4236/nr.2014.512060    5,276 Downloads   6,109 Views  Citations

ABSTRACT

In order to measure the thermophysical properties of ammoniated salt (CaCl2.mNH3: m = 4, 8) as an energy storage system utilizing natural resources, the measurement unit was developed, and the thermophysical properties (effective thermal conductivity and thermal diffusivity) of CaCl2.mNH3 and CaCl2.mNH3 with heat transfer media (Ti: titanium) were measured by the any heating method. The effective thermal conductivities of CaCl2.4NH3 + Ti and CaCl2.8NH3 + Ti were 0.14 - 0.17 and 0.18 - 0.20 W/(m.K) in the measuring temperature range of 290 - 350 K, respectively, and these values were approximately 1.5 - 2.2 times larger than those of CaCl2.4NH3 and CaCl2.8NH3. The effective thermal diffusivities were 0.22 - 0.24 × 10-6 and 0.18 - 0.19 × 10-6 m2/sin the measuring temperature range of 290 - 350 K, respectively, and these values were approximately 1.3 - 1.5 times larger than those of CaCl2.4NH3 and CaCl2.8NH3. The obtained results show that the thermophysical properties have a dependence on the bulk densities and specific heats of CaCl2.mNH3 and CaCl2.mNH3 + Ti. It reveals that the thermophysical properties in this measurement would be the valuable design factors to develop energy and H2 storage systems utilizing natural resources such as solar energy.

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Sakamoto, Y. and Yamamoto, H. (2014) Measurement of Thermophysical Property of Energy Storage System (CaCl2.NH3 System). Natural Resources, 5, 687-697. doi: 10.4236/nr.2014.512060.

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