A liquid food product is being cooled from 80oC to 30oC in an indirect heat exchanger (food does not mix with heat exchanger water) using cold water as a cooling medium. The product mass flow rate is 1800kg/h   Determine the cooling water flow rate required to accomplish product cooling if the water is allowed to increase from 10oC to 20oC in the heat exchanger.  Display your answers on a block diagram.  The specific heat of the product is 3.8 kJ/(kg K) and the value for water is

Q2

Formaldehyde at 52.688 bar and 175.65 ℃ passes through a heater-expander and emerges at 39.516 bar and 420.45 ℃. There is no work into or out of the heater, but heat is supplied. Calculate the heat transfer into the heater-expander per mole of formaldehyde

QI: The temperature of a gas stream is to be measured by a thermocouple whose junetion can be approximated as a Imm diameter sphere, as shown in Figure below. The properties of the junetion are k 35 w/m. "C. p- 8500 kg/m', and ep- 320 JAkg. "C, and the convection heat transfer coefficient between the junction and the gas is h=210 w/m, "C. Determine how long it will take for the thermocouple to read 99 percent of the initial temperature difference. Thermocouple wire Gas Th Junction Dal mm 1111

er%20Fundamentals%20and%20Applications... Q and 1100 W/m².K, respectively. The heat exchanger has a heat transfer surface area of 2.5 m², and the estimated fouling factor caused by the accumulation of deposit on the surface is 0.0002 m² K/W. The hot fluid (c, = 3800J/kg-K) enters the heat exchanger at 200°C with a flow rate of 0.4 kg/s. In the cold side, cooling fluid (c = 4200 J/kg-K)enters the heat exchanger at 10°C with a mass flow rate of 0.5 kg/s. S e of 10 nd is er- ra- ate un- an ater the for cold heat mine erall 11-104 Cold water (c₂=4180 J/kg-K) leading to a shower enters a thin-walled double-pipe counterflow heat exchanger at 15°C at a rate of 0.25 kg/s and is heated to 45°C by hot water (cp=4190 J/kg-K) that enters at 100°C at a rate of 3 kg/s. If the overall heat transfer coefficient is 950 W/m2.K, determine the rate of heat transfer and the heat transfer surface area of the heat exchanger using the e-NTU method. Answers: 31.35 kW, 0.482 m² Hot water A 100°C 3 kg/s 45°C…

1. (a) Hot oil at a flow rate of 5.5 kg/s (average cp = 1.92 kJ/kgK) enters an existing counter-flow exchanger at 435 K and is cooled by water entering at 325 K (under pressure) and flowing at a rate of 7.2 kg/s and the water exit temperature is 350 K. The overall heat transfer coefficient based on the outside area is 685 W/m²K (Average specific heat of water is 4.187 kJ/kgK). (i) Calculate the exit oil temperature. (ii) Calculate the heat transfer area. (b) The fluid in (a) enters an existing co-current-flow exchanger at the same conditions. (i) Calculate the heat transfer area. (ii) Explain the performance of both heat exchangers.

Q : Saturated methanol vapor enters a single pass heat exchanger at 95 °C and leave as a subcooled liquid at 40 °C . Water at 25 °C is used as a coolant with a flowrate of 50 kg/s . The flowrate of methanol vapor is 4 kg/s and the physical properties are : An=1102 kJ/kg , Cp,=2.84kJ/kg.K , Cp, =4.2kJ/kg.K U for condensation section is 850 W/m>.K U for subcooling section is 600 W/m>.K Calculate the area required for this duty ?

100 kg/s of a crude oil is heated from 24°C to 40°C through the tube side of a multitube heat exchanger. The crude oil flow is divided evenly among all 100 tubes in the tube bundle. The ID of each tube is 10 mm, and the inside tubewall temperature is maintained at 100°C. Average properties of the crude oil are p = 950 kg/m³, cp=1.9 kJ/kg-K, k= 0.25 W/m-K, μ = 12 mPa-s, and Uw = 4 mPa.s. Estimate the rate of heat transfer and the tube length. The rate of heat transfer is The tube length is m. W.

The reaction of but-1-ene with HBr in the presence of hydrogen peroxide results to the production of O A. 1-bromobutane O B. 1-bromobut-1-ene O C. 2-brombutane O D. 4-bromobutane

plz answer parts AB i will repost CD thanks