Engineering, 22.11.2019 04:31 Fluffyboi
Awindow-mounted air conditioner supplies 19 m3/min of air at 15 oc and 1 bar to a room. air returns from the room into the evaporator of the unit at 22oc. the air conditioner operates at steady-state on a vapor-compression refrigeration cycle with refrigerant-22 entering the compressor at 4 bar, 10 oc and exiting at 9 bar. saturated liquid refrigerant leaves the condenser. assuming the compressor has an isentropic efficiency of 70%, determine: (a) the mass flow rate of refrigerant in kg/min,(b) the compressor power, in kw,(c) the refrigeration capacity, and(d) the coefficient of performance.
Answers: 1
Engineering, 04.07.2019 18:10
Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.
Answers: 2
Engineering, 04.07.2019 18:10
Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
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Engineering, 04.07.2019 18:10
At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.
Answers: 1
Awindow-mounted air conditioner supplies 19 m3/min of air at 15 oc and 1 bar to a room. air returns...
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