- Water flows at Too₁ = 50 °C, hoo₁ = 3500 W/m² ° C in a pipe with = 1.25 cm, r2=1.33 cm and L= 1 m, the pipe has k= 16 W/m C. The outside of the pipe is exposed to a fluid with Too2=20° C, hoo₂ = 7.6 W/m²° C. Calculate the rate of heat lost by the pipe and find the temperature of the pipe outer surface T₂. Park L 8(51)
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- B-Water flows at Too 50 °C, hoo1 = 3500 W/m² ° C in a pipe with r₁= 1.25 cm, r₂ =1.33 cm and L= 1 m, the pipe has k= 16 W/m °C. The outside of the pipe is exposed to a fluid with Too2 = 20° C, hoo₂ 7.6 W/m² ° C. Calculate the rate of heat lost by the pipe and find the temperature of the pipe outer surface T₂. 0 3 + 6 f = =Q1: Water at 80 oC is pumped through 100 m of stainless steel pipe, k=16 W/m.K of inner and outer radius 47 mm and 50 mm respectively. The heat transfer coefficient due to water is 2000 W/m2.K. The outer surface of the pipe loses heat by convection to air at 20 oC and the heat transfer coefficient is 200 W/m2.K. Calculate the heat flow through the pipe. Also calculate the heat flow through the pipe when a layer of insulation, k=0.1 W/m.K and 50 mm radial thickness is .wrapped around the pipeHot water is transferred through a stainless steel pipe of 0.06m inside diameter and 5m length. The inside wall temperature is 100OC, the outside surface temperature is 80OC, the thermal conductivity of stainless steel is 16 W/mOC, and the wall thickness is 10 mm. Calculate the heat losses if the system is at steady state.
- The steel pipe has an internal radius of 50 mm., a thickness of 5 mm. and a length of 5 m. Inside the pipe, hot fluid with temperature 80 C flows inside the pipe and cold fluid with temperature 20 C flowing outside the pipe. Let k=285 W/mC and hi= 25 W/mC, ho= 10 W/mC. Find 4.1) Heat Transfer Rate (Q) 4.2) Temperature on both inner and outer tube surfaces...Water at an average temperature of 23 deg C flows through a 10-cm diameter pipe that is 2.5 m long. The pipe wall is heated by steam and is held at 100 deg C. The convective heat transfer coefficient is 2.25 x 10^4 W/m^2K. Find the heat flow in W.Please solve, thanks
- n electric generator at a power plant produces energy by passing superheated steam from a high temperature container (reservoir), through a pipe connected to a series of fans, and then into a low temperature reservoir. As the steam passes across the blades of the fans some of the heat energy of the steam is transformed into mechanical energy, which turns the fans which in turn are connected to a generator, which in turn converts the mechanical energy into electrical energy. If the high temperature steam has a temperature of 412.1 K and the low temperature reservoir has a temperature of 105.4 K, what is the Carnot efficiency of this process?Q1 (a) The temperature at the inner and outer surfaces of a boiler wall made of 25 mm thick steel and covered with an insulating material of 15 mm thickness are 350 °C and 600 °C respectively. If the thermal conductivities of steel and insulating material are 68 W/m°C and 0.126 W/mC respectively, determine the rate of flow through the boiler wall. (AT)overall Q = ΣRthQ2 a) Consider heat transfer to oil flow inside a copper pipe. Is the pipe length affecting the heat transfer rate into the oil? Briefly explain. b) Used engine oil can be recycled by a patented reprocessing system. Suppose that such a system includes a process during which engine oil flows through a 1-cm-internal diameter, 0.02-cm- wall copper tube at the rate of 0.05 kg/s. The oil enters at 35°C and is to be heated to 45°C by atmospheric-pressure steam condensing on the outside, as shown in figure given below. i) ii) iii) Determine the condensing steam temperature at 1 atm, T. [°C]. Calculate the convection heat transfer coefficient for the oil inside the pipe, [W/m'.K]. Calculate the rate of heat transfer rate into the oil, [kW], and, determine the length of the tube required. iv) Condensing steam Ct lam Oil in 35°C Oil out 0.05 kg/s I em 45°C 0.02 cm Copper tube L = ?
- Sipho’s mother is making a fire in the stove inside a shack using coal. A fan is used to extract the flue gasfrom the fire via a chimney made of zinc material. The wall thickness of Chimney is L=4mm and the walltemperature of the chimney on the flue gas side is T_si=60˚C. Sipho, playing outside next to the chimneyexperiences an ambient temperature of 20˚C. The surrounding temperature is T_sur=35˚C and the emissivityis ε=0.95. Assume the convection coefficient is 20W/m2K and the chimney is grey material.Under these conditions determine the outer surface (air side) temperature T_so=? of the chimney.Answer this ASAP The diameter of the tube is 25 mm. The specific heat of water is 4.18 kJ/kg.°C. The overall heat transfer coefficient is 0.7 kW/m².°C. 1. Schematic of temperature distribution 2.ΔTLMTD 3.Actual heat transfer rate 4.Cmin 5.Maximum heat transfer rateItem 1 1 of 5 II Review Part A A flow-through electric water heater has a 22 kW electric heater inside an insulated 2.0-cm-diameter pipe so that water flowing through the pipe will have good thermal contact with the heater. Assume that all the heat energy is transferred to the water. Suppose the inlet water temperature is 12°C and the flow rate is 8.0 L/min (about that of a standard shower head). What is the outlet temperature? Express your answer in degrees Celsius. ? Tout = °C Submit Request Answer Provide Feedback Next >