Selecting air conditioning systems for shopping centres
«With complex approach, modern design process allows to re-distribute the density of rooms on workdays and on weekends»
Sergey Bruzgin, head of Metropolis HVAC department, gave an interview to the major real estate site CRE.ru. The discussion referred to selection of air conditioning systems for shopping centres depending on the building types, intelligent design and adjustment of systems for the users' needs.
- Sergey, what air conditioning systems suit different types of retail spaces?
- Conditionally, we may divide retail spaces into several main types. Depending on this, our company determined key solutions for arrangement of cooling and air conditioning systems.
The first type of spaces are those of large area (over 40,000 sq.m) and shopping and entertainment centres (stand-alone buildings). For instance, we may take Troyka shopping centre, which is 154,000 sq.m. It is a mixed-use development including car parking, retail spaces, boutiques, production and storage premises, public catering facilities, restaurants, playing, office, administrative and accommodation areas.
The second type is spaces of average area (20,000 - 40,000 sq.m), stand-alone shopping and entertainment centres, and those integrated or attached to buildings of other purpose. Here we may refer a shopping and office centre Marksmart of the total area of 29,800 sq.m. The building is divided into two volumes - a 6-storey volume, with shopping and public premises, and a 14-storey volume, with offices from 7 floor and upwards. The 6-storey part has a central atrium with a winter garden and 2 escalators going up to level 5, and there is an 3-level underground car park under the whole building.
For the above buildings it is important that they should be adjustable to the requirements of tenants. These buildings must be saturated with modern engineering systems, and operation thereof must be controlled by a highly qualified engineering service. A preferred type of cooling system for such buildings is a chiller and fan coil unit system. It is adaptable to tenants' needs and may be updated.
The third type is small area shopping centres (5 to 20,000 sq.m), stand-alone shopping and entertainment centres, and those integrated or attached to buildings of other purpose.
For such buildings the following solutions are possible.
If the building is highly saturated with engineering services, there will be a maintenance department in the building, and a preferred system for such buildings is a chiller and fan coil unit system. In case of easier solutions, VRF-based cooling systems can be used. These systems are easier to operate but not always can they give high consumer flexibility.
Finally, the last type is retail spaces (shops) integrated or attached to residential and public buildings (up to 5,000 sq.m), corner shops.
For such buildings the following solutions are possible: the use of VRF cooling systems or in simpler cases and for retail spaces of less than 250 sq.m semi-industrial split units can be used.
- Are there any general rules for designing air conditioning systems in all the above types of buildings?
- For the above buildings it is important that they should be adjustable and adaptable to tenants' requirements. Besides, there is non-simultaneity in density of leasable areas in such buildings - thus, on workdays the main load of the cooling system falls on the office part of the building, and on weekends - on the retail part.
- Is it possible to reduce the installed capacity of chilling equipment depending on the demand at a given point of time?
- Yes. With proper design process, this approach is quite possible. Let's imagine the loads on the cooling system of different functional areas in the same building: retail spaces - 1,250 kW, office premises - 1,950 kW. Summing up the loads, the building would require a refrigerating centre of 3.2 MW. With complex approach, modern design process allows us to reallocate the density of premises on workdays and weekends, and as a result the capacity of the refrigerating centre may be reduced from 3.2 MW to 2.7 MW.
Read the interview at the web-site