co2 hp water heater

[Lc_shi]

Hi sirs
I've known there're co2 hp water heater sold in Japan. Anybody here know more about this product or related material,pls share with me. thanks!

regards
LC

[techguy]

Hi Li we at Sanyo have a range of these.
Only one for Europe at present but the range will
be developed and increased early next year.

PM me i'll send u some info.

Or try our website www,sanyo.eu you can download a brochure

[Peter_1]

This link works fine.
http://www.sanyoaircond.com/english/e_prodotti/e_pro_CO2.htm
Not such a big COP.
Why then use CO2 and why not R507c for instance?

[Jacek]

This link works fine.
http://www.sanyoaircond.com/english/e_prodotti/e_pro_CO2.htm
Not such a big COP.
Why then use CO2 and why not R507c for instance?

Hi,

I think carbon dioxide is an example of the natural refrigerants (beside ammonia; that's why they both are used in the cascade refrigeration systems) :) Its GWP is 1. R507 has GWP at the level of 3900. I think the difference lies here.

Best regards,

Jacek