Heat Transfer Equations
(5/1)
Description
The most useful resource I had earning my PE was a book of equations that was a companion to HP48 equation library. I didn't use the built in libray much, but the book of equations was an invaluable resource, and I still occasionaly use it as a resource. It is borken down into various engineering subcategories. I intend to have each of the catgories done wih XLC, but this file includes:
Heat Transfer 45 equations in these categories: Coefficent of Heat Transfer, Film Coefficent, Heat Exchanger, Heat Flow Through Various Shapes, Radiant Heat Flow
All formulas pull from a common set of variables
| A | ft | Area |
| c | Btu/lbm | Specific Heat |
| D | ft | Outside Diameter |
| D | ft | Inside Diameter |
| EE= | ||
| F | None | Shape Factor |
| F | None | Correction Factor |
| F | None | Emmissivity Factor |
| h | Btu/hr | Film Coefficent |
| h | Btu/lbm | Enthalpy |
| h | Btu/hr | Outside Film Coefficent |
| h | Btu/lbm | Enthalpy |
| h | Btu/lbm | Enthalpy |
| h | Btu/lbm | Enthalpy of Vaporization |
| h | Btu/hr | Inside Film Coefficent |
| h | Btu/hr | Outside Film Coefficent |
| K | Btu/hr | Thermal Conductivity |
| K | Btu/hr | Thermal Conductivity |
| K | Btu/hr | Thermal Conductivity |
| K | Btu/hr | Thermal Conductivity |
| K | ||
| K | ||
| L | ft | Thickness |
| L | ft | Thickness |
| L | ft | Thickness |
| L | ft | Thickness |
| LMTD= | ºF | Log Mean Temp. Difference |
| m | lbm | Mass |
| n | None | Coefficent (turbulent heat flow through pipe) |
| N | None | Prandtl Number |
| N | None | Reynolds Number |
| q | Btu/hr | Heat Flow |
| q | ||
| r | None | Transient Heat flow time constant |
| r | ft | Outer Radius |
| r | ft | Inner Radius |
| r | ft | Insulated Pipe's Total Radius |
| t | ºF | Cold Fluid Outlet Temperature |
| T | ºF | Temperature |
| T | ºF | Temperature |
| ΔT | ºF | Temperature |
| ΔT | ºF | Temperature |
| Δt= | ºF | Temperature |
| t | ºF | Cold Fluid Inlet Temperature |
| T | ºF | Thermalcouple Probe Temperature |
| t | ºF | Surface Temperature |
| t | ºF | Saturated Vapor Temperature |
| T | ºF | Wall Temperature |
| T | ||
| U | Btu/hr | Overall Heat Transfer Coefficent |
| U | Btu/hr | Pipe's outside Heat Tranfer Coefficent |
| v | ||
| Δh= | ||
| μ | lbf | Absolute Viscosity |
| ρ | lbm/ft | Body's Density |
| ρ | lbm/ft | Liquid Density |
| ρ | lbm/ft | Vapor Density |
| T | ºF | Temperature |
| T | ºF | Temperature |
Calculation Reference
Heat Transfer
Heat Exchanger
Heat Engines
Calculation Preview
(5/1)
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Comments: 3
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johndoyle-admin
13 years ago
I wonder if it would be worth uploading a version of the calculation with some typical values inserted if only to prevent #DIV/0! errors?
13 years ago
Scott this is a really useful Swiss army knife of a spreadsheet. Could you just take a look to the formula on worksheet 'Heat Transfer' cell AB60 and L116 - XLC seems to be indicating an error. If you need to update your spreadsheet take a look to the instructions [here](/support/faqs/updating-your-calculations/).
13 years ago
Thanks for your contribution Scott I have awarded a six month XLC Pro subscription by way of thanks.
