Find the heat capacity of the hot and cold fluid. PROALEM # 22.a.massat a pressure= 2at m and flow rate = 1020 kg /min,the temperature of hot water isbeing dicreared fomusing a heat exchanger.w coolant with248.09°F to 212.09 oFReservoir waterU wsed asmass flow rate = 1800 ka lmin and= 50.09 oF.The minimum = 270. 17 ft"of heat ex changerin let temperatureallow able surface are a2.%3Dall ow able overall heat = 206.05 btu/Thetransfer coefficient of heat exchangermaxi muim%3DThe heat Capaci ty to be use d must bethe average valueofinlet and outlet temperatures.

Answered: Image /qna-images/answer/e396195f-c1da-47c9-8d28-8758492fdd57.jpg

PROBLEM # 22.a. mass = 2at m and flow rate = 1020 kg /min, decreased from at a pressure= the temperature of hot water is being 212.09 OF using a heat coolant with 248.09 °F to exchanger. Reservvir water u used as and mass flow rate = 1800 kg Imin inlet temperature = 50. 04 °F. The minimum allow able surface are a = 2 70. 17 ft" %3D of heat ex changer maxi mum all ow able overall heat = 2016.05 btu/ The transfer The heat Capaci ty to be use d must be the average value of coefficient of heat exchanger inet and outlet temperatures.

PROBLEM # 22.a. mass = 2at m and flow rate = 1020 kg /min, decreased from at a pressure= the temperature of hot water is being 212.09 OF using a heat coolant with 248.09 °F to exchanger. Reservvir water u used as and mass flow rate = 1800 kg Imin inlet temperature = 50. 04 °F. The minimum allow able surface are a = 2 70. 17 ft" %3D of heat ex changer maxi mum all ow able overall heat = 2016.05 btu/ The transfer The heat Capaci ty to be use d must be the average value of coefficient of heat exchanger inet and outlet temperatures.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.14P

See similar textbooks

Similar questions

Water flowing in a long, aluminum lube is to be heated by air flowing perpendicular to the exterior of the tube. The ID of the tube is 1.85 cm, and its OD is 2.3 cm. The mass flow rate of the water through the tube is 0.65kg/s, and the temperature of the water in the lube averages 30C. The free-stream velocity and ambient temperature of the air are 10m/sand120C, respectively. Estimate the overall heat transfer coefficient for the heat exchanger using appropriate correlations from previous chapters. State all your assumptions.
A two-pass steam surface condenser is to be designed to condense10,000 kg/hr of steam having an enthalpy of 2,240 kJ/kg. Condenserpressure is 13.79 kPa. Circulating water enters the condenser at 25 OCand leaves at 40 OC. The outside and inside diameter for a water tube;OD=20 mm , ID = 17 mm and water velocity of 3 m/s. If the overallcoefficient of heat transfer is 14,100 kJ/hr-m2-OC of outside tubesurface, determine the amount of circulating water in m3/hr.
Oil in an engine is being cooled by air in a cross-flowheat exchanger, where both fluids are unmixed. Oil (cph 52047 J/kg?K) flowing with a flow rate of 0.026 kg/s enters theheat exchanger at 758C, while air (cpc 5 1007 J/kg?K) entersat 308C with a flow rate of 0.21 kg/s. The overall heat transfercoefficient of the heat exchanger is 53 W/m2?K and the totalsurface area is 1 m2. Determine (a) the heat transfer effectiveness and (b) the outlet temperature of the oil.
Incropera Heat Transfer 11.16 The hot and cold inlet temperatures to a concentric tube heat exchanger are Tim = 200°C, Tc; = 100°C, respectively. The outlet temperatures are Th„, = 110°C and 71.0 = 125°C. Is the heat exchanger operating in a parallel flow or in a counter flow configuration? What is the heat exchanger effectiveness? What is the NTU? Phase change does not occur in either fluid.
A crossflow heat exchanger uses oil (Cp =2.1 kJ/kg ·oC) in the tube bank withan entering temperature of 100oC. The flow rate of oil is 1.2 kg/s. Water flowsacross the unfinned tubes and is heated from 20 to 50oC with a flow rate of0.6 kg/s. If the overall heat-transfer coefficient is 250 W/m2 ·oC, calculate thearea required for the heat exchanger using LMTD method.
he shell fluid,ethylene glycol, enters at 120oC and leaves at 60oCwitha flow rate of 4000 kg/h. Water flows in the tubes, entering at 35oCand leaving at85oC. The overall heat-transfer coefficient for this arrangement is 900W/m2·oC.The exchanger is a shell tube with two shell passes and two tube passes.Calculate the following: a) The water exit temperature if flow rate of glycol to the exchanger is reduced in half with the entrance temperatures of both fluids remaining the same and by how much is the heat-transfer rate reduced?; b) The percentage reduction of heat transfer if water-flow rate is reduced by 25percent,while the gas flowrate is maintained constant along with the fluid inlet temperatures. Assume that the overall heat-transfer coefficient remains the same; andc) The flow rate of water required andthe area of the heat exchanger;
PART 4The following represents a parallel heat exchanger which contains 130 tubes each with a diameter of 48mm and 1.6 m long with thin walls of steel. Investigate how much hot water can be produced and how much hot gas will be needed.Using the data below determine the flow rate of water and gas for parallel and contra flow configurations and compare them.The water needs to be heated from 15oC to 95 oCThe surface heat transfer coefficient for the water = 1500 W/m2 KThe specific heat capacity of the water is 4.19 kJ/kg K. The gas temperature at inlet = 350oC and may be cooled to 120oCThe surface heat transfer coefficient for the gas = 300 W/m2 KMean specific heat of the gasses cp = 1.13 kJ/kg K.The wall is thin so the temperature drop due to conduction is negligible.
1. Explain and analyze log mean temperature differences for parallel and counter-flow conditions in simple, double-pipe heat exchanger
In a single pass, cross flow heat exchanger where two fluids are not mixed, water with a temperature of 35oC, a mass flow of 1 kg / s, a specific heat capacity of 4197 J / kgK, 250oC, a mass flow of 1.5 kg / s, a specific heat capacity of 1000J / kgK. heated by hot gas. If the heat transfer area of the heat exchanger is 40 m2 and the total heat transfer coefficient is 100 W / m2K, calculate the exit temperatures of the water and hot gas from the heat exchanger using the NTU method.