A J- type thermocouple is used to measurethe temperature in a heating process.Sheath material used is SS316. The lengthof the sheath is 14mm and thickness is0.3mm. Find the time constant of thesheath.Q"(kg/m³)(J/Kg K(W/m-k)|- °c)MaterialPlatinum2145013071.6SS304803050021.4SS316799050021.4SS410775046024.9Air1.2010050.025MgO Powder358087726.8Siliconcompound3210800Time constant of the bare material is, T=

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A J- type thermocouple is used to measure the temperature in a heating process. Sheath material used is SS316. The length of the sheath is 14mm and thickness is 0.3mm. Find the time constant of the sheath. Material Q"(kg/m³)(J/Kg K(W/m- |- °c) k) Platinum 21450 130 71.6 SS304 8030 500 21.4 SS316 7990 500 21.4 SS410 7750 460 24.9 Air 1.20 1005 0.025 MgO Powder 3580 877 26.8 Silicon compound 3210 800 3

A J- type thermocouple is used to measure the temperature in a heating process. Sheath material used is SS316. The length of the sheath is 14mm and thickness is 0.3mm. Find the time constant of the sheath. Material Q"(kg/m³)(J/Kg K(W/m- |- °c) k) Platinum 21450 130 71.6 SS304 8030 500 21.4 SS316 7990 500 21.4 SS410 7750 460 24.9 Air 1.20 1005 0.025 MgO Powder 3580 877 26.8 Silicon compound 3210 800 3

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter19: Special-purpose Outlets-water Pump, Water Heater

Section19.2: Water Heater Branch Circuit

Problem 8R: For residential water heaters, the Consumer Product Safety Commission suggests a maximum temperature...

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Concept explainers

Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.

Question

A J- type thermocouple is used to measure
the temperature in a heating process.
Sheath material used is SS316. The length
of the sheath is 14mm and thickness is
0.3mm. Find the time constant of the
sheath.
Q"(kg/m³)(J/Kg K(W/m-
k)
|- °c)
Material
Platinum
21450
130
71.6
SS304
8030
500
21.4
SS316
7990
500
21.4
SS410
7750
460
24.9
Air
1.20
1005
0.025
MgO Powder
3580
877
26.8
Silicon
compound
3210
800
Time constant of the bare material is, T=

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