Skip to main content Accessibility help
×
Home

Temperature sensing based on optical transmission in a LiBr heat pump

  • Miguel Basurto-Pensado (a1), Rosenberg J. Romero (a2), Jesús Escobedo-Alatorre (a3), Margarita Tecpoyotl-Torres (a4), Aurelio H. Jiménez-Heredia (a5) and Javier Sanchez-Mondragon (a6)...

Abstract

A new technique, based on Optical Methods, has been tested for the evaluation of the lithium bromide (LiBr) concentration, a corrosive substance frequently used in heat pumps. Those solutions have large oxidizing capabilities. This technique avoids the direct contact between the electrodes and the LiBr aqueous solution within a thermodynamic absorption cycle. The viability of this technique in a potential commercial device, resides on its capability to detect working fluid concentrations within a temperature range from 25 °C up to 70 °C, those limiting temperature values correspond to the operating wavelengths of 1.33 μm and 1.55 μm, respectively. Our system determines the correlation among the signal and temperature data, for various concentrations, between 49 and 58 mass percentages. This function of two variables is represented as a surface with the transmittance, concentration and temperature as parameters and wavelength as reference. We discuss the adequate parameters characterization used in this technique.

Copyright

References

Hide All
[1] Romero, R. J., Rivera, W. and Best, R., Solar Energy Materials and Solar Cells, Vol. 63 (4), (2000) 387 - 399.
[2] Herold, Keith E., Howe, Lawrence A. and Radermacher, Reinhard, International Journal of Refrigeration, Volume 14, Issue 5, September (1991) 264 - 272.
[3] Udd, E., Fiber optic sensor: An introduction for engineering and scientists, Ed. Wiley, New York, (1991)
[4] Chen, Kun-Huang, Hsu, Cheng-Chih, Su, Der-Chin, Applied Optics, Vol. 42 Issue 28 Page 5774 (October 2003)
[5] Christensen, D.A. and Ives, J.T., Proc. NATO Advanced studies institute, Dordrecht, Netherlands, (1987)

Keywords

Temperature sensing based on optical transmission in a LiBr heat pump

  • Miguel Basurto-Pensado (a1), Rosenberg J. Romero (a2), Jesús Escobedo-Alatorre (a3), Margarita Tecpoyotl-Torres (a4), Aurelio H. Jiménez-Heredia (a5) and Javier Sanchez-Mondragon (a6)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed