Apiping system is to conduct water at 20oc at a flowrate of 0.1 m3 /s from a location where the pressure is 8 bars to a location where the pressure must be at least 5 bars. the total length of piping is 91.4 m, the installation requires four 90o elbows, and there is no significant change in elevation. what standard-sized schedule 40 commercial steel pipe should be installed?

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.