Engineering, 11.03.2020 05:28 caguil00
Recall that the maximum heat transfer possible is the product of the minimum heat capacity (mass flow rate times specific heat) times the difference between the hot and cold side inlet temperatures. Address the following questions related to heat exchanger effectiveness. a. Sketch the temperature profiles for a 50% and 80% effectiveness heat exchanger. (As with Problem 1, make sure you have the correct shape, which, including degree of steepness at each end). b. What is the effectiveness for a heat exchanger with the following characteristics: the hot side is water entering at 160 F and 2lb/s, and the cold side is air entering at 20 F and 4 lb/s. The HX has been designed to the correct shape, which, including degree of steepness at each end). b. achieve an air outlet of 110 F.
Answers: 2
= 2 lb/s
= 160 F
= 4 lb/s
= 110 F
= 20 F
= 1.001 Btu / lb ° F
× 
= 0.24 Btu / lb ° F
= 
Another question on Engineering
Engineering, 04.07.2019 18:10
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
Answers: 1
Engineering, 04.07.2019 18:20
Most leaks in reciprocating air compressors can be detected and minimized by: (clo4) a)-detecting leakage areas using ultrasonic acoustic detector. b)-tightening joints and connections c)-replacing faulty equipment d)-all of the given options
Answers: 2
Engineering, 04.07.2019 18:20
Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms
Answers: 2
Engineering, 04.07.2019 19:10
Asteel wire of 2 mm diameter is fixed between two points located 2 m apart. the tensile force in the wire is 250n, if its density of steel is given by 7830 kg/m3 the fundamental frequency of vibration hz? ?
Answers: 3
You know the right answer?
Recall that the maximum heat transfer possible is the product of the minimum heat capacity (mass flo...
Questions
Mathematics, 03.03.2020 02:46
Mathematics, 03.03.2020 02:46
Mathematics, 03.03.2020 02:46
