Engineering, 14.09.2019 00:20 gerardogonzale362
Two litres of hot liquid at 80°c are poured into a container of mass 0.8 kg, which is at 15°c. determine the equilibrium temperature if no external heat transfers occurs. the specific heat capacity of the liquid = 3.76 kj/kgk, specific heat capacity of the container =1.24 kj/kgk, and the relative density of the liquid = 1.15.
Answers: 1
Engineering, 04.07.2019 18:10, abdirahmansoloman
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, maustin5323
Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]
Answers: 1
Engineering, 04.07.2019 19:10, netflixacc0107
What is the major difference between thermoplastics and thermosetting plastics from the polymerization structure point of view?
Answers: 2
Two litres of hot liquid at 80°c are poured into a container of mass 0.8 kg, which is at 15°c. deter...
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