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Water adsorption of CaCl2 confined in mesoporous silica gel with various pore sizes.

Number: pap. n. 95

Author(s) : MCCAGUE C., FAYAZMANESH K., KALRA M., et al.

Summary

Heat-driven adsorption cooling systems are an emerging green technology in which an environmentally friendly refrigerant, such as water, is adsorbed by a porous sorbent material. To produce cooling power, adsorption cooling systems can be designed to operate through utilization of waste heat generated by engines for automotive A/C purposes or solar thermal energy for residential A/C applications. Major challenges facing adsorption cooling systems include: low heat and mass transfer rates and durability of the sorbent materials. Novel composite adsorbents with tailored properties are required to improve the overall performance of adsorption cooling systems. Three types of silica gel with different pore size distributions and surface areas (SBET) of 494, 406 and 276 m2/gwere soaked in saturated CaCl2 solutions to produce CaCl2/silica gel composites. These composites were evaluated by nitrogen adsorption surface area analysis and temperature controlled XRD. The water uptake of the composites under adsorption cooling cycle conditions was measured with a custom gravimetric test apparatus.

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Pages: 8 p.

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Details

  • Original title: Water adsorption of CaCl2 confined in mesoporous silica gel with various pore sizes.
  • Record ID : 30013903
  • Languages: English
  • Source: International sorption heat pump conference (ISHPC2014), College Park, United States, March 31-April 2, 2014.
  • Publication date: 2014/03/02

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