2] as the primary refrigerant
in this article are referred to as second-generation ice rink C[O.
This simulative work compares two different primary refrigerant
cycles of a secondary loop system: The first system is equipped with R-134a which is widely used throughout the automotive industry.
Cascade Systems: 1100 lb (499 kg) of primary refrigerant
, and 430 lb (195 kg) of C[O.
The system operates with natural ammonia as the primary refrigerant
, cooling a glycol secondary fluid.
The technology uses a 35% aqueous propylene glycol fluid, a non-greenhouse emissions-producing secondary fluid, as a primary refrigerant
Another site using secondary refrigeration is the Cactus store in Bereldange, a suburb of Luxembourg, where ammonia is being used as the primary refrigerant
for both chilled and frozen display.
Not only that, but the Electrolux system needs only 20% as much primary refrigerant
as a conventional system.
2] as the secondary refrigerant in combination with any primary refrigerant
are referred to here as "first generation.
This improved concept has demonstrated its ability to reduce by at least 82% the quantity of primary refrigerant
They are served by a secondary refrigeration system with a glycol solution as the secondary and ammonia as the primary refrigerant
Reducing the primary refrigerant
charge is usually achieved at the cost of reduced efficiency because of the extra temperature differences required to transfer heat through the secondary refrigerant.
The refrigeration experts International Controlled Atmosphere Storage and SRS Frigadon designed a brine system using propene as the primary refrigerant