Showing papers by "Yutang Fang published in 2018"
TL;DR: In this article, a composite phase change material (CPCM) with both high latent heat and thermal conductivity for heat exchanger was developed by physical mixing method, and the mass fractions of urea in the mixture and expanded graphite in CPCM were optimized.
88 citations
TL;DR: In this article, a modified CaCl2·6H2O composite PCM for cold energy storage was prepared using urea and ethanol as thermoregulation additives, strontium chloride hexahydrate (SrCl2 ·6H 2O) and methyl cellulose (MC) as nucleating agent and thickening agent respectively.
Abstract: Cold energy storage technology with phase change materials (PCMs) has been receiving increasing attention due to the ability to effectively alleviate the electricity load. The modified CaCl2·6H2O composite PCM for cold energy storage was prepared using urea and ethanol as thermoregulation additives, strontium chloride hexahydrate (SrCl2·6H2O) and methyl cellulose (MC) as nucleating agent and thickening agent respectively. The results manifested that CaCl2·6H2O composite PCM containing 15 wt% urea and 5.0 wt% ethanol had a promising potential in air-conditioning application with phase change temperature of 11.62 °C and phase change enthalpy of 127.2 J/g. Fourier transform infrared spectroscopy (FT-IR) verified the composition of the composite PCM. With the addition of 2.0 wt% SrCl2·6H2O, the degree of supercooling of CaCl2·6H2O composite PCM could be reduced to 0.95 °C, and its enhanced crystallization behavior was confirmed by optical microscope. The modified composite PCM also showed an excellent thermal reliability after 50 heating-cooling cycles.
43 citations
TL;DR: In this article, a modified expanded graphite (EG) named Al2O3-coated EG which was characterized by enhanced hydrophilicity was developed via a heterogeneous nucleation technique and subsequent heat treatment.
19 citations
TL;DR: In this article, a novel synthesis strategy of NaA monolithic adsorbent on the honeycomb ceramic matrix was introduced, and its adsorption and desorption performances were measured by X-ray powder diffraction and Scanning electronic microscope, respectively.
11 citations
TL;DR: In this paper, the effect of the iron doping content on the structure and adsorption performance of an aluminophosphate molecular sieve with AFI type (AlPO-5) was systematically investigated.
Abstract: With a characteristic of S-shape isotherms for water vapor adsorption, aluminophosphate molecular sieve with AFI type (AlPO-5) has been considered as an up-and-coming adsorbent for the utilization in the adsorption cooling and heating (ACH) system. In order to improve its adsorption performance, iron doped AlPO-5 (FeAPO-5) with variable Fe loading was synthesized by microwave hydrothermal method. The effects of the iron doping content on the structure and adsorption performance were systematically investigated. The analysis results of X-ray diffraction (XRD), UV–visible spectroscopy (UV–Vis-DR) and scanning electron microscopy (SEM) showed that the iron ion was incorporated into aluminophosphate molecular sieves with a typical AFI structure as that of AlPO-5 through the isomorphous substitution. As the iron content of FeAlPO-5s increased, the isolated FeIII decreased, while oligonuclear FeIII and nanosized FeIII increased, besides, the static adsorption curves showed that the adsorption capacity of FeAlPO-5 increased first and then decrease. After iron modifying, the crystallinity and morphology of crystals was improved, and the adsorption performance increased from 0.185 g/g (AlPO-5A) to 0.235 g/g (FeAlPO-5), while the desorption performance of FeAlPO-5 (95.69 kJ/mol) was close to that of AlPO-5A (81.59 kJ/mol).
7 citations