Help with how to solve this equation

[utahjeff]

Can someone help me understand how to solve the part of the equation in red? I don't understand the order. If H = 7, R = 2 and Z = 3 how do I solve this?

This is not for a class. I'm working on a calculation for energy loss at work.

Thank you in advance.

 

[utahjeff]

Doe

It is a calculation from the Department of Energy for heat loss.

 

[utahjeff]

Working on details

I'm working on getting some clarification.

How about just he part with the H and lower case r in the bottom right corner? Is the same as raising to a power?

I'm wondering if I should post this in the Calculus area. Thoughts?

Thank you again.

Jeff

 

[utahjeff]

Solved

This has been solved. Thank you for all your help. In typical DOE fashion it was just over complicated.

 

[utahjeff]

The H with a lower case r is actually a constant for "Reference Height" 8.2 Ft. ( They could have just put the constant in ). The top H is the vertical distance between the highest and lowest point in the pressure boundary in feet. z = .4 for the purpose of calculation he effective annual infiltration rate in this particular problem.

The H is divided by 8.2 and raised to .4