32
Project
temperature ( 60 o C ) within four and half hours – in fact , the new system achieves a two-hour turnaround .
The high temperature demand was influenced by concerns about Legionnaires ' disease , a bacterial infection that can proliferate in warm water systems . By setting the temperature at 60 ° C , they aimed to strike a balance between ensuring water safety and meeting their heating needs effectively .
There are two methods of addressing Legionnaires ' disease :
• Shock treatment , also known as elevated temperature treatment , is a common practice in water treatment applications . However , it typically requires a significant power input to raise the water temperature beyond 72 ° C for a short duration .
• Time treatment , a more efficient approach adopted by many users , including universities and hospitals , is to maintain the water temperature slightly above 60 ° C for a specified period before lowering it back to 55 ° C . This method still ensures water safety while minimising energy consumption .
The equipment break-down is as follows : 12 CAHV-P500YB-HPB hot water heat pumps 4 TW-TH16 water temperature sensors 4 PAR-W21 MAA remote controllers 12 EV 050 R2-BAC Belimo energy valves 4 19 000l steel tanks with heat exchange coils
The heat pumps , massive 19 000l tanks and other equipment had to be rigged and hoisted into the newly constructed plant room .
32
Inside the plant room .
RACA Journal I April 2024
DATEC : CONSTRUCTION Andre Esterhuysen , technical manager owner of DATEC Airconditioning , says the project unfolded smoothly , thanks to meticulous design and planning by SHC Consulting Engineers and close collaboration among the various sub-contractors as well as the university .
The project involved co-ordination with multiple contractors , including DATEC ’ s team , as well as plumbers , electrical contractors and controls specialists , in addition to the involvement of the university and their own construction contractor ( for the plant room ) the latter being managed separately – and which consequently involved the administrative complication of two separate professional teams . The comprehensive design provided by SHC facilitated the installation process , minimising challenges typically associated with such projects so as to ensure a quality project was delivered through close attention to detail .
“ We were the main contractor on the project and liaised with the sub-contractors .” Esterhuysen emphasises the significance
www . refrigerationandaircon . co . za