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ENGG 1100 (21)
Lecture

oct 23rd.docx

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Department
Engineering
Course
ENGG 1100
Professor
Khosrow Farahbakhsh
Semester
Fall

Description
Gas is cheaper to drive. But, in terms of efficiency electric heater is more efficient. Electricity is produced from natural gas. There is no free energy. Efficiency can be expressed in different ways. Efficiency = (desired output) / (required input) Efficiency of a refrigerator = (heat output)/(energy input) SI units of power are J, KJ, cal. If energy is in joules, Power = ((joule) / (second)) = watt Quality vs. Quantity Not all energy and material sources are created equal Energy has high quality and quantity Quality if energy source is measured by the temperature it produces Water has quantity and quality Steam has quality and quantity Quality of steam is measured b
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