A new home developer is looking at alternative means of space heating and heat storage. In one potential design, a heat transfer fluid will be stored in a large tank open to the atmosphere for part of the year. The fluid level in that tank is 4 m above ground level. From the tank, the fluid will entire a system of piping through a well-rounded entrance. The piping will run through the house, transferring heat. Ultimately, the fluid will end up in a second large tank. The fluid level in the second tank is 1 m below ground, and the air above the fluid is pressurised to 0.5 kPa(g). The fluid will have  = 890 kg/m3 and  = 7.9  10-3 Ns/m2, and viscous effects cannot be neglected. The piping is entirely commercial steel, 2 cm in diameter. The piping will include seven regular, 90 threaded elbows, two fully open gate valves and five threaded unions. The developer estimates a total length of straight pipe of 20 m will be required. To ensure adequate heat transfer, the volumetric flowrate must be 0.004 m3/s. 

How much power must the pump supply to the fluid to achieve this flowrate? 

Answer rating: 100% (QA)

Solving for Pump Power in the Heating System We can solve this problem by considering the pressure drop across the entire system and using the pump eq... View the full answer