Thermodynamics HW Solutions 292

Thermodynamics HW Solutions 292 - Chapter 4 Transient Heat...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 4 Transient Heat Conduction 4-14 The temperature of a gas stream is to be measured by a thermocouple. The time it takes to register 99 percent of the initial Δ T is to be determined. Assumptions 1 The junction is spherical in shape with a diameter of D = 0.0012 m. 2 The thermal properties of the junction are constant. 3 The heat transfer coefficient is constant and uniform over the entire surface. 4 Radiation effects are negligible. 5 The Biot number is Bi < 0.1 so that the lumped system analysis is applicable (this assumption will be verified). Properties The properties of the junction are given to be k = ° 35 W / m .C, , and . ρ = 8500 kg / m 3 C p 320 J / kg. C Analysis The characteristic length of the junction and the Biot number are
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/19/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.

Ask a homework question - tutors are online