Module 12: Energy and Fuel

Question 1

wwhat is thermal equilibrium?

Answer 1

as much heat is being lost to the surrounding environment as is being gained from metabolis

Question 2

what is heating degree days?

Answer 2

how long the outdoor temperature is below 18 degree celcius over the course of an everage year

Question 3

what is cooling degree days?

Answer 3

how long the outdoor temperature is above 26 degree celcius

Question 4

heating and cooling systems all consist of four main components?

Answer 4

1. an energy or fuel supply
2. a heating or cooling equipment
3. a distribution system
4. a set of controls

Question 5

what are thw 2 types of energy measurements?

Answer 5

1. energy consumption (how much energy is needed to heat or cool a buuilding in a year)
2. energy capacity (how much energy heating equipment can provide in an hour)

Question 6

what is energy efficiency?

Answer 6

how much of the energy contained in a fuel becomes heat

Question 7

what is steady state efficiency?

Answer 7

the efficiency of the heating equipment at peak level operating temperatures

Question 8

what is the annual fuel utilization efficiency AFUE)?

Answer 8

the average efficiency of the heating equipment over a complete heating season

Question 9

what are the 4 characteristics that affect heat loss and heat gain?

Answer 9

1. temperature difference
2. area of the building envelope
3. thermal resistance
4. air tightness

Question 10

what is CSA F-280?

Answer 10

standard for heat loss and heat gain