Oil is cooled down from 140°c to 70°c in a parallel flow heat exchanger using cold liquid water. the water flow is heated from 10 °c to 40°c. calculate the effectiveness of the heat exchanger. b. the exit temperature of oil if counter flow heat exchanger is used in stead of parallel flow heat exchanger with the same inlet operating conditions and same size. a. c. under the same inlet conditions, by what percentage the length of the heat exchanger is reduced?

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid