![]() ![]() Coefficient of expansion – the fractional change in length (or sometimes in volume, when specified) of a material for a unit change in temperature.When selecting a heat-transfer fluid, you and your solar heating contractor should consider the following criteria: Our products are sure to meet your needs.Heat-transfer fluids carry heat through solar collectors and a heat exchanger to the heat storage tanks in solar water heating systems. At Kost USA, we provide top-quality heat transfer fluids for a variety of applications. Since heat transfer fluids are important for many processes, it is vital for these fluids to be of high quality. High temperature HTFs are used for temperatures above 176.6☌ up to 350☌. Glycols like ethylene glycol, Bioglycol (1,3 propanediol) and propylene glycol are used to provide freeze protection below 0☌ and can be used up to 176.6☌ with a suitable additive. Chemistries used as low temperature HTFs are hydrocarbons, silicone oils and salt brines. Normally, low temperature HTFs are used below the temperature 0☌ to about -100☌. These include low temperature fluids, medium temperature fluids and high temperature fluids. Generally the heat transfer fluids are classified into three categories. Why the Different Types of Heat Transfer Fluids? ![]() Some other examples of processes that require heat transfer fluids are: exothermic reaction for cooling a reactor, maintaining an extreme low temperature in a wind tunnel or climatic chamber, using solar energy for making water, maintaining the temperature of ice in cold storage or an ice rink and cooling electronic devices of high power. Heat transfer fluids are essential to maintain proper temperatures to remove the impurities from the gas. Raw gas contains various impurities such as CO2, H2S, water and volatile organic compounds that must be removed before gas can be used in processing equipment. In gas processing operations, removing impurity is essential to prevent fatal consequences. In pharmaceutical, heat transfer fluids that have a broad temperature range are needed as some chemical reactions require high temperature and for crystallizing final products, very low temperature must be maintained. In breweries, heat transfer fluids enable long-lasting, reliable and dependable performance by providing necessary refrigeration and cooling for secondary fermentation. Wineries, fruit processors and dairies can use these fluids to keep the products cool during processing. Heat transfer fluids offer several advantages in different freezing/chilling and dehumidifying/defrosting applications. ![]() Heat transfer fluids are also important for a number of chemical manufacture processes including phthalic anhydride (PA), linear alkyl benzene (LAB), dimethyl terphthalate (DMT), plasticizers, alcohols, olefins and several other petrochemicals. In plastic industry, heat transfer fluids are required for the polycondensation and polymerization of polyester, processing nylon, producing synthetic fibers and PET molding operations. Process Where Heat Transfer Fluids Are Required The attributes that are desirable in heat transfer fluids are low viscosity when temperature is low, high thermal conductivity and specific heat, environment-friendliness, low or non-toxicity, high flash point and economical. These fluids are used in processes where cooling or heating is required to obtain and maintain a particular temperature. A liquid or a gas that transfers heat from one component to another is called heat transfer fluid (HTF). ![]()
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