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mark simon


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Comments (4)

  • Comment on: Antipodean advances

    mark simon's comment 7 November, 2013 9:23 am

    http://www.oz-chill.com - Anyone installing, removing, altering, repairing, servicing, testing or certifying the gas system of a device (ie charging, discharging or breaking into the refrigeration system that uses hydrocarbon refrigerants) must hold a Gas Work Licence (Hydrocarbon Refrigerants) to do so.

  • Comment on: A new era for choice

    mark simon's comment 7 November, 2013 8:50 am

    http://www.oz-chill.com - Why a matched system matters?

    If the indoor coil is not matched with the outdoor unit, several major problems can occur with your system:

    Capacity will not be suffi cient to keep you comfortable
    Energy bills will increase due to reduced efficiency
    Your manufacturer's warranty may become void
    Reliability will suffer and compressor failure is more likely to occur
    The energy efficiency of a 13 SEER system requires a larger condensing unit and indoor coil. Each unit can be as much as one-and-a-half times the size of those in a 10 SEER system. This larger size allows more thermal energy to be transferred from your home to the outside.

    Just as importantly, the outdoor unit must be matched with an indoor coil that's just as efficient. Improperly matched components can put additional stress on a system, which can cause it to fail.

    Also, be sure you change the lineset to allow the refrigerant to circulate properly to avoid capacity, efficiency, and reliability problems.

  • Comment on: Climate Center introduces new range of low GWP refrigerants

    mark simon's comment 7 November, 2013 8:48 am

    http://www.oz-chill.com - Put it in the basement or other cool area of the house. The floor of the room is usually several degrees cooler than the ceiling, so try putting the tank down on the floor. Move the tank out of any direct sunlight. Put the tank directly in front of the outflow from your AC system.

  • Comment on: Is it time to stop using R404A?

    mark simon's comment 7 November, 2013 8:03 am

    Based on these assumptions, the direct CO2eq emissions for the three refrigerants were estimated to be 33.65, 18.07,
    and 0.003 Mkg for R404A, R407A, and R744, respectively. The direct emissions of R404A were approximately
    three times that of the lifetime indirect emissions. This is largely driven by the high GWP of R404A. Although
    R744 consumed on average 11% more energy than R404A, it had practically no direct emissions. Over the lifetime,
    R744 has a significant emissions payback. Adding direct and indirect emissions result in the LCCP shown in Figure
    7. On average for the 16 cities, R407A and R744 resulted in 37% and 77% less LCCP compared to R404A,
    respectively. R407A is a current drop-in replacement for R404A with a significant potential for emissions reduction
    with minimum energy penalty. For the long-term, R744 present the greatest emissions reduction. Even if the
    technology advances such that a 1% annual leakage rate can be achieved, R744 still presents significant emissions
    reduction, as shown in Figure 8. On average; R744 system resulted in 14.2% and 4.2% LCCP reduction compared to
    R404A and R407A respectively. R407A with only 1% annual leakage rate showed to result in lower LCCP than
    R744 systems in hot climates such as Phoenix, AZ. It is noted that several market barriers exist for R744 which
    hinder its market penetration. Among these are first cost due to a total system changeout and energy costs as the
    result of higher energy consumption and peak demand charges - http://oz-chill.com