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A tinned-tube, cross-how heat exchanger is to use theexhaust of a gas turbine to heat pressurized water. Laboratory measurements are performed on a prototype version of the exchanger, which has a surface area of
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- 1- For the following design conditions:- Condenser heat load (Qc) = 293 MW Condenser Pressure (Pcond) = 0.06 bar Cooling Water inlet temperature (tw,) = 25 C° Cooling Water velocity (Vw) = 2 m/s Number of Passes (N) = Single Tube Diameter (D) Tube Length (L) = 15 m Tubes Cleanliness factor (Fclean) = 0.85 Overall heat transfer coefficient (U,) = 4000 W /m²C°. Calculate the following:- = 25 mm a. Condenser Surface area b. Cooling water mass flow rate c. Condenser effectivenessarrow_forward5) During an experiment, a plate heat exchanger that is used to transfer heat from a hot-water stream to a cold-water stream is tested, and the following measurements are taken: Hot water Cold water stream stream 38.9 Inlet temperature, °C Outlet temperature, "C Volume flow rate, L/min 14.3 27.0 19.8 2.5 4.5 The heat transfer arca is calculated to be 0.0400 m. (a) Calculate the rate of heat transfer to the cold water. (b) Calculate the overall heat transfer coefficient. (c) Determine if the heat exchanger is truly adiabatic. If not, determine the fraction of heat loss and calculate the heat transfer efficiency. (d) Determine the effectiveness and the NTU values of the heat exchanger. (Answers: (a) 1724 W (b) 3017 Wiw C (c) the heat exchanger is not adiabatic so heat loss 16.4% and heat transfer efficiency 83.6% (d) effectiveness 44.4% and NTU 0.697) Hot water 38.9°C 19.8°C Cold water 14.3°C 27.0°Carrow_forward1:52 > le C:/Users/MEGA/Downloads/Cengel.%20Heat%20and%20mass%20Transfer%20Fundame FIGURE P11-79 11-80E A single-pass crossflow heat exchanger is used to cool jacket water (c, = 1.0 Btu/lbm-°F) of a diesel engine from 190°F to 140°F, using air (c, = 0.245 Btu/lbm-°F) with an inlet temperature of 90°F. Both airflow and water flow are unmixed. If the water and air mass flow rates are 92,000 lbm/h and 400,000 lbm/h, respectively, determine the log mean tem- perature difference for this heat exchanger. D Air flow - (unmixed) Water flow (unmixed) X FIGURE P11-80E 11-81 A single-pass crossflow heat exchanger with both flu- ids unmixed has water entering at 16°C and exiting at 33°C. while oil (c,= 1.93 kJ/kg-K and p=870 kg/m) flowing at 0.19 m³/min enters at 38°C and exits at 29°C. If the surface area of the heat exchanger is 20 m² determine the value of the f O 1 tu e 11 th ex 11 the ex 11 the flu the 11- rate flo ids the 11- excl be f 11- In o is no 11- exch cold 3arrow_forward
- A counterflow heat exchanger is designed to cool 1.2 kg/sec of oil withspecific heat Cp = 4.4 kJ/kg-K form 160 OC to 90 OC. Water for coolingis available at 23 OC and flow rate of 2.0 kg/sec. calculate the length ofa 5 cm inside diameter tubing in meters. The overall coefficient of heattransfer is 84 W/m2-K.arrow_forwarda counterflow heat exchange designed to cool 1.2 kg/sec of oil with specific heat Cp = 4.4 kj/kg-k form 160 C to 90 C. water cooling available at 23 C. and flow rate of 2.0 kg/sec. calculate the length of a 5 cm inside diameter tubing in meter. the overall coefficient of heat transfer is 84 w/m-karrow_forwardYOuTube Çevir Omail S Community Downl... A Haritalar Okuma listesi iş İÇİN Giriş yap 口4 INGİLİZCE Cold water entering an opposing flow heat exchanger at a flow rate of 0.6 kg/s at 20 oC (cp =4180 J/kg.K) with a flow rate of 0.75 kg/s of oil (cp 2200 J/kg.K) it is used for cooling from 110 OC to 85 oC. If the total heat transfer coefficient is 800 W/m2.lf K, What is the heat transfer area of the heat exchanger? Çeviri yap: Google Bingarrow_forward
- DS Community Downl... Haritalar EOkuma list iş İÇİN Giriş yap 口 口山凸9 İNGİLİZCE An air-cooled condenser is used to condense isobutane in a dual geothermal power plant. Isobutane, air entering at 22 oC with a flow of 18 kg/s (cp = 1.0 kJ / kg.K)is condensed at 85 oC. The total heat transfer coefficient for this heat exchanger is 2400 W/m2.K and surface area is 2.6 m2. What is the output temperature of the air? Çeviri yap: Google Bingarrow_forwardQuestion B3. A concentric tube heat exchanger is used to cool lubricating oil for a large diesel engine. The inner tube is constructed of 2 mm wall thickness stainless steel, having thermal conductivity 16 W/m K. The flow rate of cooling water through the inner tube (radius = 30 mm) is 0.3 kg/s. The flow rate of oil through the tube (radius = 50 mm) is 0.15 kg/s. Assume fully developed flow, if the oil cooler is to be used to cool oil from 90°C to 50°C using water available at 283K. The overall heat transfer coefficient is 21.9 W/(m2K). Calculate the length of the tube required for parallel (co-current) flow, and the length of the tube required for counter-current flow. The average heat capacity for oil is 2.131 kJ/(kgK) and for the water 4.178 kJ/(kgK).arrow_forward2- In a heat exchanger, steam of 0.08 bar and a specific steam content of 95% is condensed. 381.6 tons / h cooling water with a temperature of 10 ̊C flows in parallel connected tubers with inner / outer diameter 28/30 mm with a speed of 0.65 m / s. The heat transfer surface of the heat exchanger is 220 m2 and it has a k-value of 2200 W / (m2K) . Assume the specific heat capacity of the water 4.18 kJ / (kg K) and density 1000 kg / m3. The K-value is attributed to the outer mantle surface of the tubes. a) Calculate the outlet temperature of cooling water. b) How many tonnes of steam per hour are condensed? c) Determine the number of tubes and tube lengtharrow_forward
- A heat exchanger is to be designed to condense 8 kg/sec of an organic liquid (tsat=80°C, hfg=600 KJ/kg) with cooling water available at 15°C and at a flow rate of 60 kg/sec. The overall heat transfer coefficient is 480 W/m2 -°C calculate: a) The number of tubes required. The tubes are to be of 25 mm outer diameter, 2 mm thickness and 4.85 m length b) The number of tube passes. The velocity of the cooling water is not to exceed 2 m/sec.arrow_forwardTable Q3 is given to collect the temperature of hot and cold water at the inlet and outlet positions in the laboratory using Tube Heat Exchanger (TD360a) by varying the cold-water flow rate to investigate the effect of cold-water flow rate on the heat exchanger’s performance. (a) Complete all the output parameters indicated in the table given in Appendix 1. (b) Draw the temperature (TH1, TH2, TC1 and TC2) on the vertical vs position (1, 2) on the horizontal axis for each flow and discuss the effect of cold water flow rate change on the exit temperature of both cold water and hot water. (c) Draw the graph of Energy Balance Coefficient and Mean Temperature Efficiency on vertical axis and cold-water flow rate on horizontal axis. Discuss the effect of flow rate on the Energy Balance Coefficient and Mean Temperature Efficiency based on your finding.arrow_forward1 please explain well in type form thank you Why does a “mixed” or “unmixed” fluid arrangement influence heat-exchanger performance?arrow_forward
- Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning