COOLING EFFICIENCY AND SUB-COOLING

When up to 60-70% of the total heat in concrete is attributable to the coarse aggregates it makes sense to pre-chill them. Water cooling of the aggregates is the most energy efficient method to rapidly reduce concrete temperature. Chilled aggregates can produce concrete temperatures below that of what ice can do alone. For further sub-cooling a combination of ice plant and chilled aggregates brings concrete temperature down further still.

The patent protected EUROKOOL HYDROSPIRAL "EHS" allows the contractor to adopt “just in time - JIT” prechilling of their aggregates in a compact containerized, modular & portable format-This is a big cooling punch in a small package!

The rotational processing of the aggregates ensures a constant turn over of the material in the chilled water encouraging rapid heat exchange thus allowing the compact design.
 

MATERIAL SAVINGS / EFFICIENCY AND GOOD SLUMP CONTROL

SSD or “Surface Saturated Dry” is a material condition not easily achieved in hot dry climates but plays an important role in good slump control but also very importantly mitigates unnecessary losses of both admixture and cement into the aggregate pores. Materials passing through the Hydro-Spiral achieve “SSD” and thereby can save producers a significant sums of money on admixture savings alone.

PROCESS WATER CONTROL AND RECYCLING

The warm dirty discharge water from the EHS is normally directed to either a siltation pond or an optional EUROKOOL cyclone, or a combination of both dependant on the actual material particulate properties. Once the bulk of the settleable materials have dropped out the water can then be recycled either directly through an existing chiller or, when murky water is not desired to enter the chiller directly, through an optional dedicated EUROKOOL water to water heat exchanger which can re-cool the murky water without directly entering the chiller.

EXAMPLE SINGLE UNIT

Capacity 50-80 to per hour cooled aggregates from +45°C to +11°C Options

• EUROKOOL Cyclone for 15m3/hr throughput
• EUROKOOL water to water heat exchanger with Capacity 15m³/hr from 40°C to 5°C