CPD Guide to Chiller Technologies
The drive to save energy in buildings The key challenges for commercial buildings over the next 20 years are energy efficiency and carbon reduction. The Committee on Climate Change is focused on a 50% reduction in carbon emissions from 1990 levels by 2025. Largely, this goal is the common denominator behind all current legislation and initiatives set up by the Government. Even though the UK Government in July 2015 abolished plans for all non-domestic buildings to be zero carbon by 2019, the current legislation still stands - and more will be imposed via the European Union. As a result building designers, managers and owners must still comply with Part L of the Building Regulations, which concerns itself with the conservation of fuel and power. This legislation was updated in April 2014 to reflect the increasing focus on carbon reduction, with a new target of 9% improvement on the levels set under Part L 2010. This update to Part L included the introduction of minimum energy efficiency targets for air conditioning and lighting replacements. As well as the revision of Part L, there has been a raft of regulations such as Energy Performance Certificates (EPCs) and the new Energy Saving Opportunities Scheme (ESOS) that were designed to drive greater energy efficiencies in buildings and across businesses as a whole. Chillers and their functions Air conditioning is acknowledged as a significant energy user in buildings. The latest chiller technologies help to address this by ensuring that they operate to meet the precise cooling demand of the building. Water cooled chillers and air cooled chillers are refrigeration systems used to cool fluids in both commercial buildings and industrial facilities. Chilled water has a variety of applications from space cooling to process uses. The components of water cooled chillers and air cooled chillers are very similar. Each product contains an evaporator, condenser, compressor, and an expansion valve. The primary difference is whether air or water is used to provide the condenser cooling.