ICE PLANTS CHILLERS AGGREGATES COOLING

COOLING SYSTEMS ICE PLANTS CHILLERS AGGREGATES COOLING COOLING SYSTEMS

SCS EQUIPMENT

COOLING SYSTEMS ICE & ICE WATER PLANTS Guaranteed 30-50 % energy savings compared to a conventional ice system due to a higher refrigerant temperature of only -10 C instead of -28 C No glaciation and easy ice extraction as a result of the patented storage screws Ice & ice water production possible using the same system FIFO First-in, first-out ice storage: up to 60 tons possible Faster assembly and disassembly as a result of the modular container construction of the ice & cold water system and the ice storage Ice storage and ice plant do not require an additional AC unit Combination of up to 4 ice plants possible over a single storage Virtually no maintenance as there are no moving parts on the ice generator Ice delivery via screw conveyors with an inclination of up to 45 and a distance of up to 60 m possible Ice weigher with discharge diffuser for controlled ice delivery COOLING SYSTEMS

HISTORY

2009 Sale of the70th combined Ice & Ice Water Plant Premco Bin Laden / Jeddah 2004 Development of the 1st combined Ice & Ice Water Plant Palm Jumeihra / Dubai & Minden 1998 1st delivery of temperature controlled concrete Weserauentunnel / Porta Westfalica 1965 Formation of the Kändler Anlagen GmbH Minden Maintenance & Sale of concrete equipment 1958 Formation of Otto Kändler GmbH Minden Sand & Gravel 2010 Formation of Stetter Cooling Systems GmbH a JV of Stetter GmbH and Kändler Anlagenbau GmbH

EFFICIENCY Lower energy costs & a high degree of efficiency 1. The SCS ice & ice water plant is the only plant designed specifically for the requirements of the concrete industry. For this reason it is producing ice at -1 C. The conventional ice systems all use drum ice makers originally developed for the food industry. Due to their construction, drum ice makers operate at a very low evaporation temperature of up to -28 C. The ice made using these systems is typically stored at -6 C. This is an important benefit for food, as it must adhere to a minimum food storage temperature (legal stipulations). For concrete cooling, these systems have several drawbacks: the ice makers low evaporation temperature requires tremendously high cooling energies in turn requiring powerful condensers with large drive motors and hence very high energy consumption. However, the cooling effect of this under-cooled ice on direct concrete cooling is only marginal vis-à-vis warmer ice. 1 Ton of ice with -6 C contains approx. 2,5 % more cooling capacity than the same amount with -1 C. Typical mix designs comprise of approx. 170 L water/m³ concrete and typical bulk density for concrete is approx 2.2-2.4 tons/m³. When this mix water is substituted for ice at -1 C versus ice at -8 C the resultant difference on the final concrete temperature is less than 0.5 %. 100 D E C 75 50 25 0 B C -25 A -50 400 800 1200 1600 2000 2400 2800 3200 Energy absorbed by Water (kj) COOLING SYSTEMS

COOLING SYSTEMS Lower energy costs & a high degree of efficiency 2. A further benefit of the SCS plant is its high ice output in relationship to its very compact external dimensions. Worldwide, there is no other 40 container system that offers more ice output. Historically the electrical connection powers have been examined when comparing conventional plant cooling capacities. The new SCS System delivers up to 50 % better efficiency and therefore can not be compared to a conventional system on connected kw alone. This permits considerably more flexible ice production, allowing operators to react far more easily to fluctuations in concrete production. conventional Ice Plant SCS Diesel Consumption / Ton of Ice 18-21 L/ton 1 Ton ice Diesel Consumption / Ton of Ice 10,3 L/ton

COOL GREEN Environment & safety 1. SCS ice plants operate using NH ³ as a refrigerant. NH ³ is the most effective natural coolant and it s water solubility and simple chemical structure make it a very environmentally friendly solution. The potential hazards arising from inhaling high concentrations of NH ³ in the event of leaks is countered by the SCS gas detection system. If NH ³ is present in the air a warning light and warning signal is activated. If the concentration of NH ³ continues to rise and reaches a level that is harmful to health, the system is automatically switched off and can only be reactivated once the NH ³ level has dropped. Proof of the reliability of the NH ³ circuit in the SCS ice plant is that the system has been approved for use in a chemicals factory in Basle/Switzerland, which is located in the city centre. Despite the extremely high safety standards in Switzerland and neighboring residential areas, the safety authorities, after examining the system, had approved it without the need for any alteration. STETTER COOLING SYSTEMS GmbH is a proud member if the export initiative for energy efficiency. An initiative of COOLING SYSTEMS

COOLING SYSTEMS Optimized manufacturing process & modern technology 1. The FIFO (first-in, first-out) storage ensures optimum utilisation of the stored ice and maximum utilisation of the storage capacities. 2. SCS produces platelet ice at a temperature of -1 C and fill the storage with ice that has a relatively small surface-to-volume ratio than flake ice at a temperature of -6 C. For this reason, the ice can be stored at heights of up to 5 m. Therefore the full capacity of the storage facility can be exploited. Conventional ice makers produce a thinner ice that tends to compress & conglomerate itself under light pressure (this can occur when ice storage heights reach approx. 2 m). The transport rakes in conventional plants when meeting this compressed ice zone risk mechanic failure and overall wear & tear & energy consumption is increased. 5. In addition to making ice, the open construction of the heat exchanger plates in the SCS ice plants also permits the production of ice water. No other ice plant is capable of making ice and ice water from the same ice generator. Conventional ice plants require an additional water cooling system, whereas with the SCS ice plant you just flip a switch to produce ice water in place of ice. 6. All SCS products are manufactured completely in Germany and are constructed as containers and need no further components to be added. There is no other plant as mobile as SCS. 7. The 2 way reversible extraction screw at the end of the ice storage enables the plant to supply up to four batching plants from a single ice storage. 3. The screw conveyors in the SCS ice storages are constructed so that they not only transport up to 30 tons of ice per hour, but are also able to break up ice conglomerates, which may form if ice is not moved for days. 4. The SCS ice is stored at a temperature of -1 C and as a result of its closeness to the melting point is covered with a thin film of water. This thin film acts as lubricant preventing the ice from adhering and prevents it from sticking to other materials. For this reason, SCS ice can be transported via screw conveyors at angles of up to 45 and over distances of up to 60 m. FUNCTION

RELIABILITY Reduce wear & lower maintenance 1. During ice production, there are no moving components within the SCS ice generator which considerably reduces maintenance and wear. Conventional cooling systems operate with rotating drums with cutters and jets at -28 C. The SCS plant controls ice production and delivery by varying temperature in a closed system. In terms of storage, SCS uses 4 solid slow-revolving screw conveyors. Compared to a rake system which uses chain hoists the SCS screw system requires lower maintenance. 2. The SCS ice plant is operated using a singlestage 6 cylinders Grasso compressor. The pistons in the compressor are automatically engaged or disengaged depending on load demand. Grasso compressors renowned for their reliability and robustness.

COOLING SYSTEMS Example Ice Plant Stairs/Gangways Roof Section Screw Section Substructure & Melt Water Basin Screw Conveyor Ice Weigh 60 to Storage 88 to Capacity * 60 to Storage 176 to Capacity * 60 to Storage 264 to Capacity * The illustration is showing the possible ways to install SCS equipment. Customised solutions available for specialised site requirements. *per day 60 to Storage 60 to Storage 60 to Storage 88 to Capacity * 176 to Capacity * 352 to Capacity * MODULAR SETUP container is a container is a container is a contai

PRODUCT RANGE COMBINED ICE & ICE-WATER PLANTS SCS-I-44 SCS-I-44HEV SCS-I-88 Ice production / 24 hr (at 1 C incoming water) tons 44 44 88 Ice water production / 24 hr (at 45 C incoming water) m³ 125 200 244 Refrigerant NH ³ (R717) NH ³ (R717) NH ³ (R717) Refrigerant quantity l 150 175 275 Compressor type Grasso 610 Piston Grasso 610 Piston Grasso 612 Piston Required refrigeration capacity for ice production kw 172 172 354 Installed refrigeration capacity (-10 C) kw 224 224 419 Installed electrical power kw 130 130 220 Total electrical power consumption kw 76 76 155 Wet-bulb temperature C 29 29 29 Water pressure required bar 2-4 2-4 2-4 Connected load* kva 200 200 350 Container type ft 40 HC 40 HC 40 HC Length mm 12192 12192 12192 Width mm 2438 2438 2438 Height mm 2890 2890 2890 Weight (approx.) tons 13 14.5 19 Note: Other plant sizes & combinations are available on special request

COOLING SYSTEMS CHILLERS SCS-C-132 SCS-C-210 SCS-C-265 SCS-C-385 - - - - C 132 210 265 385 m³ Ice production / 24 hr (at 1 C incoming water) Ice water production / 24 h (at 45 C incoming water) NH ³ (R717) NH ³ (R717) NH ³ (R717) NH ³ (R717) Refrigerant 150 175 200 250 l Refrigerant quantity Grasso 410 Piston Grasso 610 Piston Grasso 810 Piston Grasso 612 Piston 281,21 447,38 562,43 818,07 kw Compressor type Required refrigeration capacity for ice water production 293,69 460,58 570,71 1035 kw Installed refrigeration capacity (-2 C) 92 130 151 220 kw Installed electrical power 49,7 72,2 99,2 137,8 kw Total electrical power consumption 29 29 29 29 C Wet-bulb temperature 2-4 2-4 2-4 2-4 bar Water pressure required 130 200 220 350 kva Connected load * 40 HC 40 HC 40 HC 40 HC ft Container type 12192 12192 12192 12192 mm Length 2438 2438 2438 2438 mm Width 2890 2890 2890 2890 mm Height 10 12 14 16 tons Weight (approx.) *Recommendation if overload = 30% > 1 minute

PRODUCT RANGE AGGREGATES COOLING -- HYDRO SPIRAL SCS-A-1200 Cooling capacity / 24 hr from 45 C down to 7 C tons 1200 Power consumption kw 8 Aggregates mm 2-64 Chilled water supply m³ / hr 10 Chilled water inlet in 4 Chilled water outlet in 4 Container Type ft 45 High Cube Length mm 13716 Width mm 2438 Height mm 2890 Weight (approx.) tons 18 ICE-STORAGE SCS-S-25 SCS-S-60 Capacity tons 25 60 Output tons / hr 30 30 Ice delivery 1-4 concrete batch plants 1-4 concrete batch plants Installed electrical power kw 26 26 Length mm 12192 12192 Width mm 2438 2438 Height mm 2890 6780 Weight (approx.) tons 17 32

Camargo Correa Construcoes Holcim Australia Pty Ltd. M3 Beton Souroh Al-Masharee Al Zahidi Al Manaratain Solid Concrete ICTCO Dyckerhoff AG Kies Beton Krebs / Strabag Huntsman Corporation / Ciba Geigy Aldar Readymix L.L.C. Al Fara s Construction Group / Unibeton Ready Mix Al Jaber Transport and General Contracting L.L.C. Al Nuaimi Group Readymix Abu Dhabi Ltd. Redco International Readymix Concrete W.L.L. Rehab / Shafa al Nahda Premco Bin Ladin Six Construct L.L.C. The Kingdom Readymix Concrete Xtramix Concrete Solutions L.L.C. Jirau Dam / Brazil Gorgon Gas Fields / Australia Reitersbergtunnel / Germany Riyadh / Saudi Arabia Mekka / Saudi Arabia Manama / Bahrain Dubai / UAE Kuwait City / Kuwait Silberberg Tunnel for high-speed ICE rail line Thuringia / Germany Airport Berlin-Brandenburg International Berlin / Germany Chemical Plant, Bale / Switzerland Yas Island North, Abu Dhabi / UAE Yas Island South, Abu Dhabi / UAE Mina Zayed Port, Abu Dhabi / UAE Rash al Khor / UAE Jebel Ali Industries, Dubai / UAE The Palm Jumeirah, Dubai / UAE Rash al Khaimah / UAE Al Raha Beach, Abu Dhabi / UAE Lusail-City, Doha / Qatar Redco Industries, Doha / Qatar Jebel Ali Port, Dubai / UAE Jedda / Saudi Arabia Riyadh / Saudi Arabia Dammam / Saudi Arabia Ajman / UAE Yas Island, Abu Dhabi / UAE Manama / Bahrein Abu Dhabi International Airport, Abu Dhabi / UAE Dubai Waterfront, Dubai / UAE Al Mafraq / UAE REFERENCES

COOLING SYSTEMS SCS Stetter Cooling Systems GmbH Ringkuhle 1 l 32423 Minden l Germany l Tel. +49(0)571 3897078-0 l Fax +49(0)571 3897078-8 www.stettercooling.com