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Recent content by ballen

  1. ballen

    Air Temperature Adjacent to Heat Source

    I'm trying to find a relatively simple way to estimate air temperature at a given distance from a heat source. For example, assume a large room with average temp. of 90 deg F. Within the room is a large (48" o.d.) steel chimney with a constant exterior surface temperature of 500 deg. F. How...
  2. ballen

    mcquay air cooled rotary problems

    The phenolic coating referred to is a protective coating applied to the condenser coil & fins to inhibit corrosion. For example, these units are along the seacoast, where salt air causes unprotected coils/fins to corrode before their time. The coating was bubbling, or losing its adhesion to the...
  3. ballen

    mcquay air cooled rotary problems

    We have a client experiencing some problems with McQuay ALS series chillers (air cooled screws). The problems are repeated compressor failures, particularly the gate rotors. I'm told they are a composite material and pieces are shearing off. This is happening on multiple chillers (ALS-195, 285...

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