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Microencapsulation of Phase Change Materials
Published in Munmaya K. Mishra, Applications of Encapsulation and Controlled Release, 2019
Jessica Giro-Paloma, Mònica Martínez, A. Inés Fernández, Luisa F. Cabeza
These are tasteless, odorless, white, translucent, solid hydrocarbons. The source of paraffin wax is a by-product of petroleum refinery. Typically, waxes are produced as extracted residues during the dewaxing of lubricant oil. They consist of carbon (C) and hydrogen (H) atoms joined by single bonds with the general formula: CnH2n+2, where n is the number of carbons (C). Hydrocarbons with more than 17 C atoms per molecule are waxy solids at room temperature. They are considered as paraffin wax when the number of carbon atoms is in the range of 20–40. Paraffin wax is used in paper coating, candle manufacture, protective sealants for food products and beverages, glass-cleaning preparations, floor polishing, and stoppers for acid bottles. In Table 18.2, some paraffin waxes used in TES systems are listed, detailing the number of C, the molecular weight, the melting point, and the latent heat of each one.46 Moreover, in Figure 18.2, the melting point (°C) and the latent heat of fusion (kJ/kg) of some paraffin waxes used as PCMs in building applications are represented.
Pharmaceuticals
Published in James G. Speight, Handbook of Petrochemical Processes, 2019
Paraffin wax is mostly used for relief of discomfort and pain in following conditions such as bursitis, eczema, psoriasis, dry flaky skin, stiff joints, fibromyalgia, tired sore muscles, inflammation, and arthritis. Paraffin wax is often used in skin-softening salon and spa treatments on the hands, cuticles, and feet because it is colorless, tasteless, and odorless. It can also be used to provide pain relief to sore joints and muscles. Paraffin wax is often used as lubrication, electrical insulation, and to make candles and crayons. Cosmetically, paraffin wax is often applied to the hands and feet. The wax is a natural emollient, helping make skin supple and soft. When applied to the skin, it adds moisture and continues to boost the moisture levels of the skin after the treatment is complete. It can also help open pores and remove dead skin cells. That may help make the skin look fresher and feel smoother and give comfort to the user.
Design and performance investigation of Continuous Solar Desalination Unit (CSDU)
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2021
Mays Shadeed, Reem Ashqar, Lama Araj, Amer El-Hamouz, Hanan Al Koni
This unit is a bottom tray which contains copper tubes filled with paraffin wax as a phase change material (PCM) to absorb heat during the day and release it during night. Paraffin wax is a soft solid mixture of hydrocarbon molecules with a melting point between 48°C and 62°C (Scientific, Thermo Fisher 2012). The spaces between the copper tubes were filled with Black sand. Vidoflex material with a thermal coefficient of 0.039to 0.04 W/m2.K (Anavid 2018) was used to insulate the aluminum frame and reduce the heat loss.
Heat transfer study on cylindrical and square thermal energy storage unit
Published in International Journal of Ambient Energy, 2022
J. Thamilarasan, N. Dilip Raja, K. Logesh
Paraffin wax derived from petroleum, coal or shale oil, is a soft colourless solid, consisting of a mixture of hydrocarbon molecules. It remains solid at room temperature and melts above 37°C. It is different from kerosene and other petroleum products that are sometimes called paraffin. The paraffin wax used in this project, as shown in Figure 4.