Alternate Fuel Calculations

Question 1

Calculate the input of a gas appliance that uses .275 imperial gallons of liquid propane in 40 minutes.

Answer 1

Question 2

Calculate the input of a gas appliance that uses .33 US gallons of liquid propane in 40 minutes.

Answer 2

Question 3

Calculate the output of a propane appliance that is 75% efficient and uses 20 lbs of liquid propane per hour.

Answer 3

Question 4

If a propane appliance was firing continuously at 900 mbh how long would 50 imperial gallons of liquid propane last.

Answer 4

Question 5

If the flow rate of natural gas through an orifice was 1500 cfh, what would the new flow rate be if the fuel was changed to a 50% propane 50% air mix. All other factors remain the same.

Answer 5

Question 6

A natural gas boiler with an input of 1,200,000 Btuh uses 55 % propane 45 % air mix as an emergency standby.

What would the input be when operating on the standby fuel if all other orifice flow factors remained the same?

How long would 1000 US gallons of liquid propane last if vaporized to supply the new input?

Answer 6

Question 7

A natural gas boiler is operating under the following conditions:

 - Input 15000 mbh
 - Single burner
 - Manifold gas pressure 2 psig
 - Standby fuel 55% propane 45% air mix

a.What is the area of the orifice based on a 0.9 K factor?

b.What is the input when operating on the standby fuel?

c.How many pounds of liquid propane would be required to
supply the boiler for 48 hours when operating on the
standby fuel?

Answer 7

Question 8

A natural gas boiler with an input of 1,200,000 Btuh uses 55 % propane 45 % air mix as an emergency standby.

What would the input be when operating on the standby fuel if all other orifice flow factors remained the same?

Answer 8

Question 9

A natural gas boiler with an input of 1,200,000 Btuh uses 55 % propane 45 % air mix as an emergency standby.

How long would 1000 US gallons of liquid propane last if vaporized to supply the new input?

Answer 9

Question 10

A natural gas boiler is operating under the following conditions:

 - Input 15000 mbh
 - Single burner
 - Manifold gas pressure 2 psig
 - Standby fuel 55% propane 45% air mix

a. What is the area of the orifice based on a 0.9 K factor?

Answer 10

Question 11

A natural gas boiler is operating under the following conditions:

 - Input 15000 mbh
 - Single burner
 - Manifold gas pressure 2 psig
 - Standby fuel 55% propane 45% air mix

b. What is the input when operating on the standby fuel?

Answer 11

Question 12

A natural gas boiler is operating under the following conditions:

 - Input 15000 mbh
 - Single burner
 - Manifold gas pressure 2 psig
 - Standby fuel 55% propane 45% air mix

c.How many pounds of liquid propane would be required to
supply the boiler for 48 hours when operating on the
standby fuel?

Answer 12