Coolants selection

Although the three sets of factors just given can be considered singly or in combination, and although a coolant-selection chart can be used as a guide, the most obvious choice of coolant is not always satisfactory from every aspect. Among other (and... 

P/ACE MDQ Methods Temperature control of capillary column with rapidly Development System recirculating liquid coolant. Selectable temperature control... 

Compressor Outlet Pressure Originally set based on coolant selection and system optimization from past JIMO trade studies. Based on SNPP Heat Balance Section 6 and Brayton Turboalternator Section 9.1. 

Initial scoping phase contracts with Hamilton Sundstrand, Heatric, Holtec International, Inc., and Honeywell International, Inc. assessed gas cooler material options, recommended design configurations and provided an initial reliability assessment. Various component configurations were recommended for water and NaK heat rejection coolants by each of the vendors. Heat rejection coolant selection (H2O or NaK) impacts both the gas cooler material and configuration selection. 

The preheated gases react exothermically over the first-stage catalyst with the peak temperature ia the range of 330—430°C, depending on conditions and catalyst selectivity. The conversion of propylene to waste gas (carbon dioxide and carbon monoxide) is more exothermic than its conversion to acroleia. At the end of the catalyst bed the temperature of the mixture drops toward that of the molten salt coolant. 

The benefits to be obtained by the correct selection and application of coolant are considerable. The cost is hardly a major factor in production operations, however, because, on average, the price of coolant amounts to about 1 per cent of the finished cost of a machined component. 

Working with an established Tier 1 supplier Houghton International, Ford selected a two-phase metalworking lubricant/coolant based on vegetable oil. In trials at the Dagenham Engine Plant Ford foimd many benefits ... 

The desired product is P, while S is an unwanted by-product. The reaction is carried out in a solution for which the physical properties are independent of temperature and composition. Both reactions are of first-order kinetics with the parameters given in Table 5.3-2 the specific heat of the reaction mixture, c, is 4 kJ kg K , and the density, p, is 1000 kg m . The initial concentration of /I is cao = 1 mol litre and the initial temperature is To = 295 K. The coolant temperature is 345 K for the first period of 1 h, and then it is decreased to 295 K for the subsequent period of 0.5 h. Figs. 5.3-13 and 5.3-14 show temperature and conversion curves for the 63 and 6,300 litres batch reactors, which are typical sizes of pilot and full-scale plants. The overall heat-transfer coefficient was assumed to be 500 W m K. The two reactors behaved very different. The yield of P in a large-scale reactor is significantly lower than that in a pilot scale 1.2 mol % and 38.5 mol %, respectively. Because conversions were commensurate in both reactors, the selectivity of the process in the large reactor was also much lower. 

Manual on Selection and Use of Engine Coolants and Cooling System Chemicals ... 

Manual on selection and use of engine coolants and cooling system chemicals/Ioseph A. Lima and George R. Otterman, editors.—4th ed. 

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