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Heating and Air Conditioning I. Principles of Heating, Ventilating and Air Conditioning R.H. Howell, H.J. Sauer, and W.J. Coad ASHRAE, 2005. basic textbook/reference material For ME 421 John P. Renie Adjunct Professor – Spring 2009. Chapter 1 - Background. Introduction
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Heating and Air Conditioning I Principles of Heating, Ventilating and Air Conditioning R.H. Howell, H.J. Sauer, and W.J. Coad ASHRAE, 2005 basic textbook/reference material For ME 421 John P. Renie Adjunct Professor – Spring 2009
Chapter 1 - Background • Introduction • National Academy of Engineering list of achievements “that had the greatest impact on the quality of life in the 20th century” • Air conditioning and refrigeration – tenth • Primary function of an HVAC system • The generation and maintenance of comfort for occupants in a conditioned space, or • The supplying of a set of environmental conditions for a process or product within a space
Chapter 1 - Background • Introduction • Criteria to be considered in the design
Chapter 1 - Background • Introduction • Details to be considered to properly design an air-conditioning system
Chapter 1 - Background • Introduction • Details to be considered to properly design an air-conditioning system
Chapter 1 - Background • Introduction • Details to be considered to properly design an air-conditioning system
Chapter 1 - Background • Introduction • Details to be considered to properly design an air-conditioning system
Chapter 1 - Background • Introduction • Details to be considered to properly design an air-conditioning system
Chapter 1 - Background • Introduction • Details to be considered to properly design an air-conditioning system
Chapter 1 - Background • Historical Notes • Historical excerpts • Fires – earliest form of heating • Ventilation fan – da Vinci in 15th century. • Boyles and Dalton’s laws in 1600 and 1700s • Dr. William Cullen (ice via vacuum) • Ben Franklin - stove
Chapter 1 - Background • Historical Notes • Historical excerpts
Chapter 1 - Background • Historical Notes • Historical excerpts
Chapter 1 - Background • Historical Notes • Historical excerpts • Furnaces • Steam Systems • Early Refrigeration • Mechanical and Chemical Refrigeration • History of ASHRAE (ton of refrigeration) 1904 - 1906 • Willis H. Carrier – “Father of Air Conditioning” • Comfort Cooling • List of improvements and developments over the twentieth century
Chapter 1 - Background • Historical Notes • Historical excerpts
Chapter 1 - Background • Historical Notes • Historical excerpts
Chapter 1 - Background • Historical Notes • Historical excerpts
Chapter 1 - Background • Historical Notes • Historical excerpts
Chapter 1 - Background • Building Energy Use
Chapter 1 - Background • Historical Notes • Historical excerpts
Chapter 1 - Background • Historical Notes • Historical excerpts
Chapter 1 - Background • Building Energy Use
Chapter 1 - Background • Building Energy Use
Chapter 1 - Background • Building Energy Use
Chapter 1 - Background • Conceptualizing an HVAC System • Other rules of thumb – pg. 7 • Face velocity of 500 FPM to determine face areafor cooling coil • 400 CFM/ton – cooling airflow rate • 2.5 gpm/ton water flow rate • 1.2 CFM/sq ft floor area conditioned airflow rate • 1 kW/ton for power for air conditioning
Chapter 1 - Background • Sustainability and Green Buildings • LEEDS – national standard – “greenness” based on sustainable sites, water efficiency, energy and atmosphere, materials and resources, and indoor air quality
Chapter 1 - Background • Sustainability and Green Buildings • All decisions become interactive as the result of each subsystem’s power or energy performance being continually compared to the “budget”
Chapter 1 - Background • Newest issue of Global Climate Change – Copenhagen • Hacked email controversy
