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Recent content by zhangw2008

  1. zhangw2008

    What concentration of propylene glycol is dangerous?

    Hi,does anyone know the concentration of propylene glycol that will risk people's health? Thank you for any help?
  2. zhangw2008

    How pressure changes with time(solar water system)?

    Thank you for your replies. There is no BFP between the water main and the water storage tank.The objective of this project is to see if a BFP is necessary by calculating how much of glycol will flow back into the water main without a BFP.If the concentration of glycol in the water main is...
  3. zhangw2008

    How pressure changes with time(solar water system)?

    Hi, this is my first thread. I need some help with my project. The situation is as follows: There is a leak of glycol from heating coil into the solar storage tank.The heating coil ruptures because the circulating pump stops. The whole system goes to stagnation.The high temperature and high...

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