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Recent content by NoHtPp

  1. NoHtPp

    Heat Transfer Through a Tube

    Throw it at Ernie Cherry Aquasystemsinc.com MI he has a slew of observed points WITH REFRIGERANT gasses in his cool-ing HX coils I just bought 3 , 1 for w:w radiant; and two for DX r22 system, shell around coils. Mention "JP" and he may have a moment to square up your calcs- est's... (not...
  2. NoHtPp

    Low temperature air-air heat exchenger

    Perhaps throw some numbers at the 2-row 30 sq meter face area of a coil at an OEM/ (their software- coil design or equal) of air coil HX's and see what fluid temps at 3 GPM (?l/m) that you arrive at per 10,000 btuh to 15,000 btuh at selected water temps and DX refrigerant conditions to get a...
  3. NoHtPp

    heat transfer coefficent

    Mr.LTX: I appreciate reading your posts! Q: When you find the glass that fell out of the space shuttle payload section when the doors opened, what was it full of? -technically: if not in any atmosphere, ambiently-
  4. NoHtPp

    Correctly calculating heating loss in-slab radiant heating

    HKL: for garages with newer tight doors and std insulation's: how close did it come to ~ 20 btuh / sq ft in the book ? and for 75F out to flooring and near 62 returning in a 55f garage on a zero Northern night? we found a 440sq ft garage held 45 to 50f , ice-melted the autos well, on just...
  5. NoHtPp

    Ground Source Heat Pump Loop (geothermal) anti-freeze

    We have commercial library loops (1997 installation) that never get below 38f, nor above 88f, back to GTHP...[average 220 f per block loaded cooling ton Trane calculator, then in 120ft water below grade in 300ft 1" pe dr-11, enhanced grout, 17ft apart boreholes ] but I would always have some...
  6. NoHtPp

    Ground Source Heat Pump Loop (geothermal) anti-freeze

    Great HKL ! That is sooooooooooo important even at spec'd 24% glycol in Northern Loops frequently LW to the ECL, gle ground loop, is 30f to 27f (yikes) and a 50% "pump penalty is in place at the charts... What is meant by that is if I want total circulation and GEOTHERMAL unit heat exchangers...
  7. NoHtPp

    Geothermal piping calculations

    I believe est: in average N-TX soils there , some dampness, that the horizontal boring would be correlated to 12ft depths (or more if they can get to a stuck drill rod) and near 300ft per ton of to 96f out/ 88 back, in Aug-Sep to the ECL. gle, plastic piping, 20 ft apart runs... ~ 70 gpm...
  8. NoHtPp

    Geothermal piping calculations

    OP Prichmon Please check my opinion: I have published in NEOHIO 186ft per vertical borehole loaded ton of HEATING off compressor tons, no hot water features absorbing more energy, and 230 to 240 ft per loaded net-block continuous cooling tons. The numbers can be correlated. the ratio is a...
  9. NoHtPp

    air change

    Do you need to move all the air volume? Peak of the building to floor and all walls sides? Height x Width x depth of length? in cubic ft or meters? Or just cooling air changes of the top 8 ft high or less for open - top offices and manufacturing and retail, etc, not trying to cool all of the...
  10. NoHtPp

    fresh air load calculation

    how much heat load will take that fresh air ? ? How much heat load that fresh air has to be removed? What dew point do you have to what do you want at what temperature to end up with; as in first reply...?
  11. NoHtPp

    Heat pumps: Minimal return water temperature while heating

    NOTE: Those high EER's above Energy Star Closed Loop ratings are AHRI raw data. EER's 40+ are about of the low staging and middle stages in the then "double-sized" heat-exchanging surface areas of water coils and air coils. MO' Metal to compressor is about : compared to a small (of duals...
  12. NoHtPp

    Heat pumps: Minimal return water temperature while heating

    Hi Herr: I have also greatly enjoyed your posts! As a GTHP nut, though, if not for sake of "air source" simple dual compressor technology pioneered by HYDRO-TEMP.com of AR and primary looping back , to the HP, helps a lot. [not o confuse with hydro-delta, -hydro-heat, as some will do ]...
  13. NoHtPp

    Zig: to thread403-341447 What'd ya do?

    thread403-341447 Lifecycle is so well for GeoThermal (WaterSource) Heat Pumps in schools that are net zero with little solar, they are found lasting in schools of over 20 years to date. Customer of reverse-flowing the fluids on just a single cycle chiller/heater (not reverse heate pump) using...
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