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Single-Pass Cooling

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Single-pass cooling is the term used to describe a process that uses water to cool something once.  This is in contrast to closed-loop or recirculating systems, which reuse water continuously.  Single-pass cooling can be found in equipment such as autoclaves and ice makers.  It is also commonly used to cool reactions in chemistry.

Single-pass cooling is not only wasteful, but, as many labs know, it can be a safety hazard as well.  Eliminating this from your workflow can save hundreds of thousands of gallons of water each year and prevent the risk of flooding.  Instead of running water continuously to cool a reaction try one of these ideas instead:


  • An ice bucket + a fish pump to create a recirculating water bath
  • An air-cooled condenser
  • A recirculating water bath

The first two work great for reactions that are less than 1L; the third is typically the best choice for larger reactions.  Here are a couple of types of air cooled condensers to consider: 
  • Findenser (by Heidolph)
  • CondenSyn (by Asynt)

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  • Home
  • About
    • Our Team
    • News & Publications
    • Newsletter
    • Employment Opportunities
    • Contact Us
    • Data Privacy
  • Programs
    • Green Lab Certification
    • Green Chemistry
    • Freezer Challenge
    • ACT
    • CEEL
  • Resources
    • Carbon Impact of Biotech & Pharma Report
    • Waste
    • Energy
    • Water
    • Green Chemistry
    • Other Topics
    • How to Green Lab
    • Partners
    • Case Studies
  • Sponsorship
    • Corporate Sponsorship
    • Donate
  • 2022 MGL Summit
    • 2022 Europe Summit
    • 2021 Sustainability Summit
    • 2020 Sustainability Summit
  • The Beaker
  • Education
    • Ambassador Program
    • Green Lab AP
  • Out of the Box Podcast