An insulated heat exchanger is designed to cool an air flow from 640 K to 400 K both states at 500 kPa. The coolant is water taken from a stream at an average temperature of 15 degrees C and pressure 100kPa. If the water exits the heat exchange as saturated mixture with quality of .95, determine the mass flow rate of the water, in kg/s, necessary to attain the design parameters if the volume flow rate of the air is 12 m^3/s. (assume variable specific heats for air and R is .287 kPa-m^3/(kg-K)
it is somewhat to do with fixing equations. the value of Plan a million might properly be written as 3000 + 10x on an identical time as the value of Plan 2 might properly be written as 14x the place x is the style of minutes. we've an interest whilst the value of the two plans is equivalent. This basically ability we'd desire to set the equations equivalent to a minimum of one yet another and take a inspect to sparkling up for x. value Plan a million = value Plan 2 => 3000 + 10x = 14x Now rearrange: => 3000 = 14x - 10x => 3000 = 4x => x = 750 as a result whilst x=750 minutes, the value of the two plans would be equivalent.
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