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Cooling

Summary From L ast Week “R” Values and “U” Factors “R” is Resistance to heat flow “U” is Conductance in Btuh / ft 2 / o F “U” Factor Calculation “U” = 1 / (R 1 + R 2 + . . .+ R n ) Heat Transfer through surfaces “Q”=”U” x Area x (T 1 –T 2 ). Cooling.

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Cooling

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  1. Summary From Last Week “R” Values and “U” Factors “R” is Resistance to heat flow “U” is Conductance in Btuh / ft2 / oF “U” Factor Calculation “U” = 1 / (R1 + R2+ . . .+Rn) Heat Transfer through surfaces “Q”=”U” x Area x (T1 –T2) Cooling Mechanical and HVAC Systems for Construction

  2. Summary From Tuesday Cooling Mechanical and HVAC Systems for Construction

  3. Summary From Tuesday Cooling Mechanical and HVAC Systems for Construction

  4. Summary From Tuesday Cooling Mechanical and HVAC Systems for Construction

  5. Why does a “One Ton” air-conditioner only weigh 65 pounds? Cooling Mechanical and HVAC Systems for Construction

  6. Why does a “One Ton” air-conditioner only weigh 65 pounds? Cooling Mechanical and HVAC Systems for Construction

  7. Why does a “One Ton” air-conditioner only weigh 65 pounds? To Change 1 ton of 32 of Ice To 32 of Water Heat of Fusion for Water is 144 btu/lb 2000 Pounds/Ton x 144 Btu/Pound = 288,000 Btu 288,000 Btu / ton / 24 Hr Per Day = 12,000 Btuh/ ton Cooling Mechanical and HVAC Systems for Construction

  8. Why does a “One Ton” air-conditioner only weigh 65 pounds? Cooling Mechanical and HVAC Systems for Construction

  9. An Odd Bit of History In 1927 in Dallas, Texas, the Southland Ice Company, started selling milk, eggs and bread from a dock of an ice-manufacturing plant as a convenience to its customers. The idea was so popular that the company opened several similar stores in Dallas. Initially, these stores were open from 7 a.m. to 11 p.m. hours unprecedented in their length at the time. The idea seems to have worked, and they still sell ice. Cooling Mechanical and HVAC Systems for Construction

  10. Ice Cooling Cooling Mechanical and HVAC Systems for Construction

  11. An Odd Bit of History Cooling Mechanical and HVAC Systems for Construction

  12. Evaporative Cooling Cooling Mechanical and HVAC Systems for Construction

  13. Dr. John Gorrie, Apalachicola, FL Cooling “There is a crank down in Apalachicola, FL who claims he can make ice as good as God Almighty.” The New York Times Mechanical and HVAC Systems for Construction Scientific American, Sept 22, 1849

  14. Dr. John Gorrie, Apalachicola, FL Germ Theory Robert Koch developed a series of tests used to assess the germ theory of disease. Koch's Postulates were published in 1890, and derived from his work demonstrating that anthrax was caused by the bacterium Bacillus anthracis. In the 1870s Joseph Lister was instrumental in developing practical applications of the germ theory of disease with respect to surgical techniques. Antiseptics and hand washing, for surgeons, for example. Cooling Mechanical and HVAC Systems for Construction

  15. Dr. John Gorrie, Apalachicola, FL Malaria -- Bad Air Malaria is a mosquito-borne infectious disease of humansSymptoms of malaria include fever, shivering, joint pain, vomiting, anemia, hemoglobinuria, retinal damage, and convulsions. It is widespread in tropical and subtropical regions. Cooling Mechanical and HVAC Systems for Construction

  16. The Refrigeration Cycle Cooling Mechanical and HVAC Systems for Construction

  17. The Refrigeration Cycle Cooling Mechanical and HVAC Systems for Construction

  18. The Refrigeration Cycle Cooling Mechanical and HVAC Systems for Construction

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