JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

UNIT - I

Building Survey-location of equipment. Heat gain through glass-calculation of solar heat gain through ordinary glass tables-shading devices-effect of shading devices. Thermal resistance of various building materials.

UNIT - II

Heat Transfer Through Building Structures: Periodic heat transfer through walls and roofs. Empirical methods to calculate heat transfer through walls and roofs using decrement factor and time lag method. Equivalent temperature difference method. Infiltration-tack effect-wind effect.

UNIT - III

Heating Load Calculations: Winter heating load calculation-heat losses through structure-heat losses due to infiltration. Effects of solar radiation and internal heat sources on heating loads. Methods for estimating energy requirements for heating.

UNIT - IV

Air Heating System: Classification - gravity warm heating system, forced warm air heating system-balancing a warm air heating system, warm air furnaces, air cleaners, humidifiers & De- humidifiers, advantages & Disadvantages of warm air heating system. Common problems and remedies of warm air heating system.

UNIT - V

Hot Water Heating System or Hydraulic Heating System: Classification-based on water circulation, piping arrangement i.e. one pipe system, two pipe direct return system, gravity hot water system. One pipe & two pipe gravity hot water heating. Forced hot water heating system, gas boilers, circulating pump, radiation

REFERENCES:

th

• 1. HVAC Fundamentals Volume-l / James E. Brumbou / Audel / 4 Edition
• 2. Fundamentals of HVAC Systems / Robert Mcdowall / Academic Press / 2007
• 3. Home Heating & Air Conditioning systems / James Kittle / MGH
• 4. HVAC Fundamentals / Samuel C. Sugarman / Fairmont Press / 2005.
• 5. Principles of Refrigeration – Dossat, Pearson
• 6. R&AC Hand Book by ISHRAE I Year -II Sem. M. Tech (HV & AC)