Define cooling load. What are the purposes of estimating cooling load?
A conference room for seating 100 persons is to be maintained at 22°C DBT and 60% RH. The outdoor conditions are 40° DBT and 27°C WBT. The various loads are- Sensible and latent heat loads per person 80W and 50W respectively; lights and fans 15000W; sensible heat gain through glass, walls, ceiling 15000W, the air filtration is 20 m³/min and fresh air supply is 100 m³/min. 2/3 of circulated room air and 1/3 of fresh air are mixed before entering the cooling coil. The by-pass factor of the coil is 0.1. Determine apparatus dew point, the grand total heat load and ERSHF.
Define cooling load. What are the parameters for estimating cooling load? Describe the indoor and outdoor loads.
Describe the space heat gain for air-conditioning. What are the general guidelines for space cooling load calculations?
Briefly describe the essential components of air-conditioning system with net sketch.
Define metabolic rate and define also mechanism of body heat loss.
Define comfort air conditioning. Describe the indoor design condition of air conditioning for different application.
Define solar constant and its correction factor. Which types of solar radiation comes into the building?
What are the essential components of air conditioning system? Write their functions.
Describe the space heat gain for air conditioning. What are the general guidelines for space cooling calculations?
What is cooling load? Why is it needed? Describe the design day, outdoor loads and indoor loads.
Prove that the equivalent diameter for circular duct to replace rectangular duct for the same velocity of air is de=1.265[a3b3a+b]1/5d_e = 1.265 \left[ \frac{a^3 b^3}{a+b} \right]^{1/5}de=1.265[a+ba3b3]1/5 where, ded_ede = equivalent diameter for circular duct, aaa = width of the rectangular duct, bbb= breadth of the rectangular duct.
Twenty three hundred liters of partially frozen ice cream at -4°C are entering a hardening room 3m×5m×3m high each day. Hardening is completed and the temperature of the ice cream is lowered to -28°C in 10h. The walls, including floor and ceiling are insulated with 150mm of polyurethane and overall thickness of the wall is 250mm. The ambient temperature is 32°C and the RH is 50%. Assume the average density of ice cream is 0.6 kg/L. The average specific heat below freezing is 2.1 kJ/kg-K and the average latent heat per kg is 233 kJ. Determine the average hourly load based on 18h operation.
What are the factors to be kept in mind while storing the foods in cold storages? Explain in brief.
A cooler 4 m×3 m×3 m high equipped with 6 m×0.7 m×1 m triple-glass doors is used for general purposes storage in a grocery store. The cooler is maintained at 2°C and the service load is heavy. The walls are insulated with the equivalent of 100 mm of corkboard and the ambient temperature is 25°C. Determine the cooling load in kW based on a 16 hr operating time.