This download link is referred from the post: JNTUA M.Tech 2nd Sem last 10 year 2010-2020 Previous Question Papers (JNTU Anantapur)
Code: 9D17104
M.Tech I Semester Supplementary Examinations August 2016
--- Content provided by FirstRanker.com ---
AIR-CONDITIONING - I
(Refrigeration & Air Conditioning)
(For students admitted in 2012, 2013, 2014 & 2015 only)
Time: 3 hours Max. Marks: 60
Answer any FIVE questions
--- Content provided by FirstRanker.com ---
All questions carry equal marks
- What is psychrometry and explain the psychrometric processes in air-conditioning equipment.
- 120m3 of air/min at 35° DBT and 50% R.H is cooled at 20°C DBT passing through a cooling coil. Determine the following: (i) R.H and WBT of outgoing air. (ii) Capacity of the cooling coil in TOR. (iii) Amount of water vapour removed from air.
- The room sensible and latent heat loads for an air conditioned space are 25 KW and 5 KW respectively. The room condition is 25°C dry bulb temperature and 50% relative humidity. The outdoor condition is 40°C dry bulb temperature and 50% relative humidity. The ventilation requirement is such that on mass flow rate basis 20% of fresh air is introduced and 80% of supply air is re-circulated. The by-pass factor of the cooling coil is 0.15. Determine:
- Supply air-flow rate.
- Outside air sensible heat.
- Outside air latent heat.
- Grand total heat.
- Effective room sensible heat factor.
--- Content provided by FirstRanker.com ---
- Explain with a neat schematic diagram, the working principle of year round air conditioning system and describe the functions of different components in the circuit.
- Explain working principle of air washer with a neat sketch.
- One kg of air at 40°C dry bulb temperature and 50% relative humidity is mixed with 2 kg of air at 20°C dry bulb temperature and 20°C dew point temperature. Calculate temperature and humidity of mixture.
- Explain in brief about how the human body reacts to changes in temperature of environment. Also explain the effect of activities on the heat load calculation for comfort application.
- What is effective temperature? What factors governs optimum effective temperature?
- What are the different methods used to remove the odors from the air?
- Describe briefly three general types of temperature sensitive mechanisms used in thermostat.
- Explain the necessity of automatic controls in refrigeration and air conditioning system.
- Describe the different methods of humidity control.
- Explain the working of a linked air cycle heat pump.
- Explain briefly solar energy collectors.
--- Content provided by FirstRanker.com ---
--- Content provided by FirstRanker.com ---
--- Content provided by FirstRanker.com ---
This download link is referred from the post: JNTUA M.Tech 2nd Sem last 10 year 2010-2020 Previous Question Papers (JNTU Anantapur)
--- Content provided by FirstRanker.com ---