Homework: A counterflow heat exchanger is located between a collector and a storage tank. The fluid in the collector side is a water-glycol mixture with cp=3840 J/kg. °C and a flow rate of 1.35 kg/s, whereas the fluid in the tank side is water with a flow rate of 0.95 kg/s. If the UA of the heat exchanger is 5650 W/°C, the hot glycol enters the heat exchanger at 59°C, and the water from the tank at 39°C, a) estimate the heat exchange rate; b) if FRUL is 5.71 W/m².°C and collector area is 16 m², what is the ratio FR/FR?

Homework: A counterflow heat exchanger is located between a collector and a storage tank. The fluid in the collector side is a water-glycol mixture with cp=3840 J/kg. °C and a flow rate of 1.35 kg/s, whereas the fluid in the tank side is water with a flow rate of 0.95 kg/s. If the UA of the heat exchanger is 5650 W/°C, the hot glycol enters the heat exchanger at 59°C, and the water from the tank at 39°C, a) estimate the heat exchange rate; b) if FRUL is 5.71 W/m².°C and collector area is 16 m², what is the ratio FR/FR?

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.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.8P

See similar textbooks

Similar questions

If 14 gpm of water is flowing through an open-loop heat pump with a temperature difference of 7F, how much heat in Btu/h is being absorbed or rejected in the heat pump? Show all work and units.
The TXV responds to an increased heat load by A. decreasing refrigerant flow. B. keeping refrigerant flow constant. C. increasing refrigerant flow. D. not reacting to changing heat loads.
3.24 You want to cool air from 150°C to 60°C but you cannot afford a custom-built heat exchanger. You find a used cross-flow exchanger (both fluids unmixed) in storage. It was previously used to cool 136 kg/min of NH3 vapor from 200°C to 100°C using 320 kg/min of water at 7°C; U was previously 480 W/m²K. How much air can you cool with this exchanger, using the same water supply, if U is approximately unchanged? (Actually, you would have to modify U using the methods of Chapters 6 and 7 once you had the new air flow rate, but that is beyond our present scope.)
A steam condenser receives 10 kg per second of steam with an enthalpy of 2570 KJ/kg. Steam condenses into liquid and leaves with an enthalpy of 160 KJ/kg, if cooling water passes through the condenser with temperature increases from 13oC to 24oC. Calculate the cooling water flow rate in kg/sec. pls dont skip anything show all solution including conversion of units
In a heat exchanger, the heat transfer depends on the choice of the control volume
Q1] A shell and tube heat exchanger is used to heat water (C = 4236 J/kg. °C) from 80°C to 150°C at a rate of 12.5 kg/s by hot gas that enters the exchanger at 350°C with a rate of 20.36 kg/s. The overall heat transfer coefficient is 290 W/m² °C. The gas making 2-shell passes and the water making 4-tube passes. Calculate the heat transfer surface area (Cp (gas) = 1.04 kJ/kg.°C). heat flux: (a) by
A steam condenser receives 10 kg per second of steam with an enthalpy of 2570 KJ/kg. Steam condenses into liquid and leaves with an enthalpy of 160 KJ/kg, if cooling water passes through the condenser with temperature increases from 13oC to 24oC. Calculate the cooling water flow rate in kg/sec. Show conversion of units pls
if A 22 C Water enters a heat exchanger with a velocity 0.8 m/s and tube diameter is 10 mm, it leaves at 34 C what is the heat transferred to water. in kW 3.157 O 31.569 O 3.94 O
Hello! I'd like help with the following exercise, from Levenspiel's "Engineering Flow and Heat Exchange". Leftover air at 20ºC and 100kPa is driven by a fan through a horizontal galvanized conduit of 1 m in diameter and 10m in length at a speed of 10 m/s. What size motor should be used if its efficiency is 90% and that of the fan is 20%? I'm not sure where to start. My professor hasn't explained much about this subject.
Refrigerant condenses in the tubes of a cross flow heat exchanger at 41 °C, 16.7 MJ/hr is rejected form the refrigerant by air "c= 1005 J/kg.K". Air enters at 24 °C and leaves at 37 ;c. What is heat transfer area of the refrigerant side (m) when the overall heat transfer coefficient refrigerant side on the is 151 W/m".°C? Hint use LMTD method and assume a correction coefficient of 100%
3.13 Air at 2 kg/s and 27°C and a stream of water at 1.5 kg/s and 60°C each enter a heat exchanger. Evaluate the exit temperatures if A = 12 m², U = 185 W/m²K, and: a. The exchanger is parallel flow; b. The exchanger is counterflow [Tħout = 54.0°C]; c. The exchanger is cross flow, one stream mixed; d. The exchanger is cross flow, neither stream mixed. [Thout = 53.62°C]
Compressed liquid water at 10 MPa and 20 C enter a steam generator (Heat exchanger) which has a uniform 30-mm diameter tube at a rate of 3 L/s. Find the rate of heat added to the water (in kW) if it exists at 9 MPa and 400 C. Select one O a. 8333.8 kW O b. 8638.8 kW O C. 9131.2 kW d. 9556.4 kW O e. 7854.2 kW O f. None of the above