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28-10-2022, 07:49 PM #1
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SH control of a TEV with high glide refrigerant.
There's a new low GWP (150) refrigerant R455a to replace R404A but it has a glide of 12.5K, larger than we ever encountered in the past (R407c)
How do they technically accomplish it to measure correct the SH at the end of the evaporator? Is there another refrigerant in the bulb reacting at a 'difference of 12.5K' or is there another technical part inside the TEV counteracting this?
https://icemeister.net/backroom/wp-c...frigerants.pdfLast edited by Peter_1; 28-10-2022 at 08:16 PM.
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29-10-2022, 07:35 PM #2
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Re: SH control of a TEV with high glide refrigerant.
My own, maybe naive, view is they would use a small amount of liquid 455a, would this not simulate the same reaction as boiling off in the evap?
That is a huge glide, would this require a greater refrigerant charge compared to a higher gwp refrigerant, with equal heat absorbtion capacities?Mostly found in the southern part of this green and pleasant land.
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31-10-2022, 06:42 PM #3
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Re: SH control of a TEV with high glide refrigerant.
no experience with it... just googled it
it's a little odd it's 3% Co2 ?
I'd have thought the pressures and temperatures of the system would mean it never condensed?
