It is well-known that the cooling equipment dominates in energy consumption in commercial buildings. Alongside, electricity prices are increasing around the world, increasing pressure on facility managers to reduce the operating costs incurred by operating chillers. The facility managers at a newly constructed commercial building in Canary Wharf, London, were tasked to build and deploy a central air conditioning system with improved energy efficiency and lifecycle value, and Kaltra was invited to contribute to this task.
Based on the survey and analysis undertaken jointly with the customer’s technicians, we were able to specify the equipment and controls necessary to build an energy efficient HVAC system.
Some of the major features our Lightstream air-cooled chillers offered were: Turbocor compressors – with variable capacity control, flooded evaporator, condenser banks with pre-coated aluminium heat exchangers, and advanced controls, including energy management algorithms. Four chillers with a total refrigeration capacity of 5400kW charged with refrigerant R1234ze were installed and configured to operate under the control of sequence management system, and integrated into the customer's BMS, allowing accurate adjustment of the chillers to manage supply water temperature and other critical parameters.
During the design stage, we evaluated the performance of the offered solution by applying it to BMS data obtained from previously completed projects with multiple chillers and showed that the designed system with chiller sequence management could save over 35% of energy consumption compared to the currently running chillers in the buildings.
The project has now reached its concluding phase, and the chilled water plant operates in a pilot stage.
Headquartered in Germany, Kaltra Innovativtechnik GmbH designs, develops, and manufactures air conditioning and refrigeration equipment and systems. The company offers air-cooled, water-cooled, and free cooling chillers, precision air conditioners, IT cooling systems, including room-, rack- and row-based solutions, and energy management solutions. It also designs and manufactures air-cooled condensers, dry coolers, and cooling units for special applications. Additionally, Kaltra offers microchannel heat exchangers for condenser, evaporator, and water cooling and heating applications, as well as aluminum coils for small cooling applications. All Kaltra products are engineered with the clear objective of improving energy efficiency and reducing total cost of ownership.
For more information on Kaltra and its products call +49 911 715-32021 or visit www.kaltra.de