Dowtherm heat-transfer fluid

Dowtherm Heat-Transfer Fluids. Dow Chemical Co. manufactures a family of heat-transfer fluids to meet differing appHcations. Dow Chemical also markets the Syltherm fluids produced by Dow-Coming Corp. Design and operating guidelines are offered in many of the company pubHcations describing the Dowtherm fluids. 

Figure 10-50C. Tube-side (inside tubes) liquid film heat transfer coefficient for Dowtherm . A fluid inside pipes/tubes, turbulent flow only. Note h= average film coefficient, Btu/hr-ft -°F d = inside tube diameter, in. G = mass velocity, Ib/sec/ft v = fluid velocity, ft/sec k = thermal conductivity, Btu/hr (ft )(°F/ft) n, = viscosity, lb/(hr)(ft) Cp = specific heat, Btu/(lb)(°F). (Used by permission Engineering Manual for Dowtherm Heat Transfer Fluids, 1991. The Dow Chemical Co.)...

Figure 10-93B. Process vessel with internal coil and agitation to improve heat transfer. (Used by permission Engineering Manual Dowtherm Heat Transfer Fluids, 1971. The Dow Chemical Co.)...

Anonymous, Dowtherm Heat Transfer Fluids, The Dowtherm Co., Midland, MI, 1967. 

Dowfrost Heat transfer fluids, Dow Dowlex LLDPE, Dow Dowtherm Heat transfer fluids, Dow DrapeX Epoxy and polymeric plasticizers, Witco... 

Heat-transfer-fluid heaters maintain the temperature of a circulating liquid heating medium (e.g., a paraffinic hydrocarbon mixture, a Dowtherm, or a molten salt) at a level that may exceed 673 K (750°F). 

Heat transfer fluids petroleum oils below 600°F, Dowtherms below 750°F, fused salts below 1100°F, direct fire or electricity above 450°F. 

Figure 3.15c. In this system a heat-transfer fluid, such as Dowtherm (see Perry and Green (1984) and Singh (1985) for details of heat-transfer fluids), is used to avoid the need for high-pressure tubes. The steam is raised in an external boiler. 

Dowtherm HT Heat Transfer Fluid, Dow Chemical Co., Midland, Mich. 

There are two major alternatives in the heating, namely, steam or a heat transfer medium such as Dowtherm (Dow Chemical Company) heat transfer fluid. The system must be such that the heating medium must be rapidly replaced by a cooling medium. The switching must be on a fail-safe sequence. 

Laboratory tests and actual fires show that Dowtherm A (a heat-transfer fluid consisting of a eutectic mixture of biphenyl oxide and... 

Next, select a heat-transfer fluid. If we select steam at 700 °F (371 °C) the jacket pressure will be 3094 psia (213 bar), which is much too high. At this pressure, the jacket and reactor-wall will be very thick, resulting in a costly reactor. Also, it is not good practice to use high-pressure steam for heating. If we select Dowtherm A vapor, the jacket pressure will be 106.8 psia (7.37 bar) at 700 °F (343 °C) [24]. The maximum temperature allowed for Dowtherm A is 750 °F (399 °C) [24]. 

High-boiling heat-transfer fluid (Dowtherm), 200 mL... 

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