Projects
REFRIGERATION WORKS
The mechanical team supplied a plant room that provides
three Bitzer Multiplex racks that are charged with
refrigerant gas R407F. The ethylene gas is also fitted in the
plant room area. Two CaREcube side stream filtration units
were installed and connected to the condensers. “These
minimise dirt and algae build-up in the evap-condensers,
which in turn optimises the condenser performance and
increases the longevity of condensers,” Mac Donald adds.
Copper pipes were used throughout for the refrigerant
piping. All the evaporator coils were designed by EP
Engineering and supplied by HC. These were fitted with
Danfoss electronic expansion valves to control refrigerant
flow and room temperature.
Holding room.
50
explains Mac Donald. The four pulldown rooms are designed to
pull down 30 pallets of mangoes from 30⁰C to 8⁰C in 24 hours,”
he explains.
The blueberry pull down room is designed to cool down
four pallets of product from 30⁰C to 6⁰C in one hour.
Energy Partners supplied and installed all refrigeration
equipment for the Estate.
RACA Journal I March 2020
TICKING ALL THE BOXES
Despite the tight deadline Energy Partners had to meet, the
team was also faced with designing multipurpose rooms –
thus making design challenging. “Three of the rooms, (Rooms
11-13) are designed to de-green mangoes and citrus at 21⁰C
and precool mangoes to 8⁰C. When de-greening, CO 2 needs
to be removed from the rooms, RH kept at 90% and ethylene
www.hvacronline.co.za