| Project/Area Number |
09650258
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Thermal engineering
|
|---|
| Research Institution | High Energy Accelerator Research Organization |
|---|
Principal Investigator |
HARUYANA Tomiyoshi High Energy Accelerator Research Organization, Particle and Nuclear Studies Associate Professor, 素粒子原子核研究所, 助教授 (90181031)
|
|---|
| Project Period (FY) |
1997 – 1998
|
| Project Status |
Completed (Fiscal Year 1998)
|
| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1998: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1997: ¥1,300,000 (Direct Cost: ¥1,300,000)
|
|---|
| Keywords | Heat flux sensor / Cryogenic temperature / Multilayer insulation / Radiative heat transfer |
|---|
| Research Abstract |
This study is related to the development of heat flux sensor which will be applicable to measure the heat flux to the cryogenic equipment through the multilayer insulation. The commercially available heat flux sensors are usually designed for measurement of very large heat flux such as radiation from the melting furnace. The cryogenic heat flux sensor should have a high performance to measure such small teat flux as radiation from 300 K to 80 K surfaces, i.e. 1-50 W/m2 even through the multilayer insulation. The Peltier element is investigated as a promissing sensor for in situ measurement of these small heat flux. It has much higher sensitivity than any conventional thermopile type heat flux sensors. By using originally developed equipment for generating constant and caliblated heat flux at cryogenic temperature, the performance of the commercially available Peltier elements were measured. The experimental results show its capability for use at cryogenic temperature. These Peltie elements have 10 times higher sensitibity compared to the conventional sensors. The temperature dependence of output voltage of the Peltier element is also investigated in order to verify the applicability on actual system. Due to the ristriction of the present experimental equipment, temperature dependence of the paerformance was tested in the rage of a few degree. The result shows that the output voltage of the element is almost independent against temperature. It can be applicable as an in situ heat flux sensor in cryogenic system where the radiative heat flux will be dominant.
|
