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Experimental and theoretical study on the influence of temperature and humidity on the flammability limits of ethylene (R1150)

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  • Wu, Xi
  • Yang, Zhao
  • Wang, Xiaoming
  • Lin, Yulong

Abstract

The LFL (lower flammable limit) and UFL (upper flammable limit) of R1150 were researched experimentally on a self-made test rig according to the Chinese National Standard GB/T12474 under variable temperature and humidity conditions. Results showed that the LFL increased with the decrease of temperature, while the UFL reduced, therefore the flammable range shrank 3.42% from 55 °C to −5 °C. Another group of experiments had been carried out to test the influence of humidity on the flammable limits of R1150 at 25 °C, which presented that the LFL increased less than 0.1 and UFL reduced 0.87 in volume fraction when humidifying the air to 42.4% (relative humidity). At the same time, a new method of estimating the LFLs of general hydrocarbons was presented and the relative deviation between the calculated value and experimental datum of R1150 was as small as 0.88%. On that basis, the influence of temperature on the LFL of R1150 was estimated by adding parameter enthalpy into the computational formula, the relative errors lay in 0.35–2.54% at the temperature range from −5 °C to 55 °C. The research achievements can benefit for utilizing the hydrocarbons refrigerants in variable temperature and relative humidity.

Suggested Citation

  • Wu, Xi & Yang, Zhao & Wang, Xiaoming & Lin, Yulong, 2013. "Experimental and theoretical study on the influence of temperature and humidity on the flammability limits of ethylene (R1150)," Energy, Elsevier, vol. 52(C), pages 185-191.
    • Handle: RePEc:eee:energy:v:52:y:2013:i:c:p:185-191
    DOI: 10.1016/j.energy.2013.01.042
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