Projects
© RACA Journal | Benjamin Brits
© RACA Journal | Benjamin Brits
The roof plant . Roof plant – chilled water generators .
capital cost and energy efficiency , which was achieved in this project by the selection of equipment , and input on elements such as the performance of glass and glazing of the building . Further , it is always important for GPCE that the correct diversification is used in the selection of equipment .
HVAC SYSTEM DESIGN AND INSTALLATION The hotel building is serviced with air-cooled chillers with one main chiller providing chilled water for all the cooling-only fan coil units and air handlers in the building .
There is a heat-pump chiller , that drives the fresh air handling units so that the fresh air being supplied into the building and into the rooms is tempered . This heat-pump chiller provides either the heating or cooling for the specific air handler .
Bathroom extraction and a fan coil arrangement is provided in each room – as you walk into the room the fan coil units are installed in the bulkhead with a grille , supplying air to the rooms . Each fan coil unit also has an electric heater ( one of the items that could not meet the initial required specifications ).
The room passages and corridors are supplied from the heat pump and fresh air unit located on the roof . The internal installation all comprises use of a two-pipe system and the electric heaters as mentioned .
The bedrooms all function through a key operating system , so the air conditioning units are only turned on when a guest places their key into the key slot in the room . This also activates the other electrical elements in the room such as lighting .
There are several fan coil units feeding the ground floor where the lounge area , lobby and dining room is located . The basement ( below ground level ) is where the main kitchen is located and is air conditioned through an air handling unit connected to the main chiller . The makeup air for the kitchen is through a dedicated heatpump chiller and air handling unit to provide tempered fresh air into the kitchen , which has a fairly large preparation area .
The extraction from the basement section is executed via an ecology unit . The fan discharge is achieved through a strategically used signage tower at the back of the development to aid in the building aesthetics . The ecology unit was selected because the
© RACA Journal | Benjamin Brits © RACA Journal | Benjamin Brits
Typical chilled water air handling unit installation .
Basement level – extract fan installation .
www . hvacronline . co . za RACA Journal I July 2021 33