A food-processing plant requires that two large process areas A and B be kept at constant temperature TA = - 8°C and TB 12°C. The refrigeration load of area A is 175 kW. The heating load of area B is 210 kW. Conditioning of the two spaces is achieved by an (cyclic) electrical air-conditioning and heating unit (CM) that also interacts with the environment at To = 5°C, as shown in the %3D figure.

Q: 3. A refrigerator with a power of 450W and a COP of 1.5 is used to cool 5 watermelons of 11kg each…

A: GivenP=450WCOP=1.5n=5m=11kgT2=8oCT1=28oCCp=4.2 kJ/kgoC

Q: The inner and outer surfaces of a 25-cm-thick wall are at 27 oC and 45 oC, respectively. The outer…

A:

Q: As shown in the figure, an exterior wall of a building has an average thermal conductivity of 0.32…

A: Givenk=0.32Btu/h ft  oRL=5inT1=70oFT2=?To=20oFh=5.1Btu/h ft2 Ro

Q: A solar radiant heat flux of 700 W/m2 is absorbed in a metal plate that is perfectly insulated on…

A: Given : solar radiant heat flux, q' = 700 w/m2 convection heat transfer coefficient , h = 11 w/m2.…

Q: Thermodynamicclass  contains  32  undergrad  students.  The  plan  is  to   air-conditionthe…

A: Given data: Total number of students = 32 Cooling capacity of air-conditioning unit = 8 kW Heat…

Q: Determine the quantity (volume) of saline water in a steam generator. The heat energy of 1624 kJ is…

A: Given: T1=24°CT2=101°CQ=1624 kJ/kgρ=1015 kg/m3c=4.6 J/kg°K

Q: A room is heated by an electrical space heater operating at 1500W and its temperature is 800 C. The…

A: Given: space heater Q˙ = 1500 W Temperature(Th)  = 800°C Convective heat transfer coefficient (h)= 6…

Q: A room is initially at the same temperature as the air outdoors, 10°C. A heater whichconsumes 1kW of…

A: The objective of the question is to calculate the equilibrium temperature reached in the room when a…

Q: The energy required to heat a 50m^2 living area in Canberra is of 18738 MJ per year. Assume the…

A: To Find : a) The annual cost of heating the living area with the three systems above.b)The two heat…

Q: Refrigerant 134a is stored inside an uninsulated rigid tank (see figure below) and heated by an…

A: Given    Voltage, V = 12 V      Current, I = 5 amp Time taken, t = 5 min Find   Energy lost, E

Q: A solar collector absorbed 40 W/m2 heat from the atmosphere. This is equal to the convection brought…

A: Given data,  q = Q/A = 40 W/m²  T1=40°C  T2=80°C

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.