seamless pattern of red construction tape vector 17555061

IMD is aware of the current delay with the distribution of print publications by the South African Post Office.

In order to ensure our customers receive their publications IMD is able to distribute all our publications digitally OR to your street address through an alternative supplier in all major areas.

Please contact the distribution department at distribution@interactmedia.co.za to continue receiving your publications digitally or to your street address.

We appreciate your patience and understanding during this time.

seamless pattern of red construction tape vector 17555061

    

Table Bay Mall: elegant, yet efficient

Table Bay Mall: elegant, yet efficient

By Ilana Koegelenberg

The new Table Bay Mall in Cape Town boasts a tailor-made 9MW HVAC solution that includes not only conventional packaged units, but also ducted DX hideaways and an air-cooled chilled water plant.

Table Bay Mall in Cape Town is the largest regional mall in the hub of the Big Bay, Bloubergstrand, and West Beach areas and offers over 65 000m2 of retail space, with the option to expand to 90 000m2. Parking includes 1 300 bays outside and 2 000 undercover parking bays.

Construction began towards the end of 2015 and the mall was officially opened at the end of September last year. It is now home to more than 150 shops and restaurants — offering a retail mix of local and international brands anchor tenants, such as Woolworths, H&M, Pick n Pay, and Checkers.

This flagship development aims to be a significant contributor to the economic development of both the West Coast region and the Western Cape province. With an investment of over R1-billion by Zenprop, Table Bay Mall created 5 000 jobs during construction, boasting an estimated 8 000 additional jobs now that it is complete (including tenants and service providers).

GPCE carried out the final selection of all equipment and handled the design entirely out of Johannesburg.

In terms of its design, the shopping mall is unique. It is shaped like a figure eight, with a super-basement underneath. The sophisticated maritime design of Table Bay Mall has been inspired by the curved, flowing lines of the world’s most elegant power yachts. The building features extensive use of wood inside to make it look like the hull of a super yacht.

Due to the current drought and future water issues facing the Western Cape, innovative green building technologies have been incorporated into the design, with water- and power-saving initiatives playing a major part in the long-term sustainability of the site — from single-flush toilets and LED lighting to rock gardens and rainwater being harvested from the roof.

All about the time

The project was awarded to Graeme Page Consulting Engineers (GPCE) coming off the back of Mall of Africa. They came on board quite late, as the preliminary design and a large part of the architectural work had already been completed.

Despite being Johannesburg-based, the client selected GPCE based on their extensive retail experience (among others). This was the first time GPCE handled a project remotely but, interestingly enough, they were also awarded a project in Durban at the time, as well as one in Walvis Bay (Namibia). All three projects were handled professionally and handed over on time and well within budget.

The consultants were very hands on during this project. GPCE worked in association with two companies in Cape Town — Andrew Minnaar Consulting Engineers (AMCE) and Greenline Consulting Engineers — who handled a lot of the construction management for GPCE when they couldn’t necessarily be on site in Cape Town all the time. Still, MD Graeme Page travelled to Cape Town weekly and, during certain stages of the project, flew Stephen Frewen of AMCE to Johannesburg to finalise the project.

Exposed services inside one of the retailers.
Image credit: Total Air ControlThree Rhoss chillers were installed.
Image credit: Total Air ControlImage credit: Vivid ArchitectsGPCE worked with the architects from Vivid Architects from early on to ensure there was ample space for the chilled water plant rooms.
Image credit: Total Air ControlThe chilled water plant room at Table Bay Mall.
Image credit: Total Air Control

It took a lot of careful planning, but the project went very smoothly according to Page. Group 5, who was the main contractor, did a very good job in coordinating contractors, which ensured that the project finished on time. “The project was seamless for us,” says Page. “It went really well; we had no problems.”

GPCE worked with the architects from Vivid Architects from early on to ensure that there would be ample space for the equipment and that the chilled water plant rooms in the design were accounted for.

In terms of contractors, Total Air Control (TAC) in Johannesburg won the project, despite several Cape Town contractors also tendering on the job. This also helped the project run smoothly, as GPCE and TAC had a lot of experience working together on the Mall of Africa shopping centre.

Jamie Wearne of TAC relocated to Cape Town for 15 months to ensure everything ran according to plan. TAC even hired a farm in the Cape Town area to help store ducting and equipment. The ducting was made in Johannesburg, shipped to Cape Town, and built up there.

System description

Zenprop (the client) has completed various retail projects before and was quite specific in their requirements. “They know what they want and what has worked well on previous centres,” says Page.

The shopping centre was split into various components under the directive of the client. The client preferred that all the majors and nationals like Mr Price and H&M, for example, be served by their own plant. Here, air-cooled packaged plants were selected by GPCE. The balance of the stores was served by a chilled water plant.

Three air-cooled Rhoss chillers were installed in the central chilled water plant to feed these stores. The smaller shops and restaurants are equipped with fan coil units (FCUs) while the larger shops have above-ceiling air handling units (AHUs). Every store has its own unit that connects to the chilled water plant. This allows total control for each tenant in terms of temperature as well as timing, sequencing, usage, and control.

Ultimately, everything came together seamlessly, and the team finished the R54-million HVAC-value project on time and below budget.

This also means that each tenant pays for the exact use of their air conditioning, through the installation of energy meters in each of the shops.

However, the banks required their own solution and were not linked to the chilled water plant. This was done for two main reasons, the main one being the fact that the banking sector sometimes had different operating hours when compared to the rest of the mall. It would be a waste to run a chilled water plant just for the banks. Also, in terms of location, the banking section is situated at the front of the centre, which meant that it had a different load to the line shops inside the mall. As such, the banks are served by ducted DX hideaway units. This conveniently suits most of the specifications for the banking sector.

The design conditions were (±1.5°C):

  • Internal design – 22°C
  • Outside design (Cape Town) – 32°C

GPCE carried out the final selection of all equipment and handled the design entirely out of Johannesburg. The three chillers (2.3MW in total) were tendered separately and specifically selected as the most suited to this specific project, offering the best efficiencies. As mentioned, the team was sensitive to the water crisis in Cape Town and as such, air-cooled chillers were specified.

The 65 000m2 super-basement is completely mechanically ventilated — both for day-to-day parking ventilation conditions as well as for fire conditions. In the event of a fire, the mechanical fans in the basement extract the smoke to the atmosphere. The process is controlled through CO2 sensors.

The design was two-fold with the major fans serving the plant rooms, while the balance of the area is controlled by under-slab jet tube-type fans. Three of the fans are 2m in diameter.

Challenges

The chilled water plant with AHUs and FCUs solution can be challenging if there are many shop changes to a project (which inevitably there are in shopping malls due to the variety and needs of every individual tenant). Changes are easier to accommodate when a single packaged unit is installed.

The travelling was a challenge but, thanks to careful planning, a challenge that was easily overcome for all parties involved.

Another challenge was the pace of the tenanting and getting the required leasing information.

Then of course, the urgency of the project and fast-tracked schedules.

The sophisticated maritime design of Table Bay Mall has been inspired by the curved, flowing lines of the world’s most elegant power yachts.
Image credit: Vivid ArchitectsThe mall includes a Virgin Active gym as well as more than 150 other shops and restaurants, significantly boosting employment in the area.
Image credit: Vivid ArchitectsBefore the tenants moved in.
Image credit: Total Air ControlDue to the current drought and future water issues facing the Western Cape, innovative green building technologies have been incorporated into the design.
Image credit: Vivid Architects

On time, under budget

Ultimately, everything came together seamlessly, and the team finished the R54-million HVAC-value project on time and below budget. Page explains that they are very proud of the fact that in the five years that GPCE has been operating, they have never exceeded a budget once. They take great care to ensure that the process is managed very strictly and that they save the client money wherever they can.

List of professionals

Owner   Table Bay Mall Property Trust
Developer Zenprop 
Architect / Designer  Vivid Architects 
Project manager   PCPM Project Managers and WT McClatchey Associates
Quantity surveyors MLC Quantity Surveyors
Consulting engineers Electrical QUAD Africa Consulting
Mechanical Graeme Page Consulting Engineers
Wet services Aurecon
Civil and structural Aurecon
Contractors Main building Group 5 Ciastal
HVAC & R Total Air Control 
Product suppliers Chillers Rhoss (Voltas Technologies) 
Axial flow fans Luft Industries Natal 
Tube fans Luft Industries Natal | Systemair
Pumps Wilo
AHUs Petra
Fire dampers Electrovent 
Smoke extract fans Flakt Woods 
Grilles  Trox | Systemair 
Split units Daikin | LG
FCUs EcoAire | Aerolique (Skyshot)
Ducting Metflex Johannesburg | Cape Sheet Metal Works | Precision Duct Manufacturing 

Click below to read the April 2018 issue of RACA Journal

RACA APR 2018

02 Sep 2018
08:00AM - 05:00PM
1st IIR International Conference on the Application of HFO Refrigerants
04 Sep 2018
08:00AM - 05:00PM
ATMOsphere Asia
05 Sep 2018
08:00AM - 05:00PM
Mostra Convegno Expocomfort (MCE) Asia
16 Oct 2018
08:00AM - 12:00AM
Chillventa 2018 - 16-18 October

PRODUCT OF

IMD logo Whitesmall

Interact Media Defined (IMD), is one of South Africa’s leading multi-media magazine publishers READ MORE

 

Talk to us

JHB T : +27 (0) 11 579 4940
CPT T : 0861 727 663
E : admin@interactmedia.co.za

13A Riley Road, Bedfordview,
South Africa 2007

© Interact Media Defined