INCORPORATING COLD CHAIN
PROJECT
Heat loads were sub-divided into design compartments for various areas such as the docking bays and then central corridors . condensing temperature was selected at 30 ° C , resulting in a 9K approach on the design ambient wet bulb condition . All condenser fans were equipped with VSDs to ensure fan law efficiencies were maximised during low load conditions , exponentially increasing efficiencies as load decreased .
The PHEs were selected with a very tight 2K approach resulting in a 4K LMTD for the HT and MT systems . What this further allowed is for the system to be able to operate with a PHE out of service by reducing the suction temperature by only 0.7K on the MT system and 2K on the HT system .
System reliability and redundancy is absolutely critical for this type of facility considering the centralisation of the client ’ s distribution and the associated business and product value that moves through this facility . Redundancy was incorporated as responsibly as possible while ensuring that single points of failure were eliminated as far as possible . A further aspect that was implemented in the design is that where redundancy was required , it was employed to increase efficiency during normal operation , that is running the compressors at lower speeds for recips , running a reduced number of screws at full load on the MT system and reducing condensing temps and fan speeds on condensers . These energy savings elicit significant paybacks on the required redundancies and make the overall installation significantly efficient . CLA
LIST OF PROFESSIONALS : Project name : Pick ‘ n Pay DC Inland Owner Developer Architect / Designer Project manager
Consulting engineers
Contractors
Product suppliers
Architect Project Manager Logistics / Infrastructure Design Quantity Surveyor Refrigeration Consultant Mechanical Engineer Structural Engineer Civil Engineer Electrical Engineer Wet services Engineer Fire Consultant HSE Consultant Sustainability Consultant Principle Building Contractor HVAC Contractor Refrigeration Insulation Contractor Electrical Contractor Product Compressors Condensers Blower Coils Fans Controls Vessels Plate Heat Exchangers PICV ’ s Pumps Bellows Electrical boards
Insulation installation Water treatment
Fortress Propfund Fortress Propfund ICM Architects BBA Consulting ICM Architects Brown + Altini Consulting Relog Quanticost AMC Engineers AMC Engineers Sotiralis Consulting Engineers Sotiralis Consulting Engineers MNS Electrical Redline Consulting Engineers Chimera Cairnmead Industrial Consultants Solid Green Consulting WBHO Aircycle MRE Gauteng IDS Presto Supplier Mayekawa EVPCO Heating Centre EBM Papst Carel Viola Danfoss / Alfa Laval Danfoss KSB Elaflex / Flowcon
Industrial Motor Controls Intertherm G-Chem
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