FEATURE AIR CONDITIONING


HEAT RECOVERY FOR whole building energy efficiency


Refrigerant Temperature technology and continuous heating during defrost. Variable Refrigerant Temperature


technology allows the system to respond to heating or cooling requirements by monitoring the required capacity and weather conditions. By continually adjusting refrigerant temperature to match heating or cooling demand and the outside temperature, less power is needed, efficiency is increased and comfort is improved. An added benefit is that higher refrigerant off coil temperatures help prevent cold draughts. As well as efficiency, it is important to


Public and private organisations are increasingly seeking highly efficient whole building solutions for climate control. Heat recovery systems, delivering excellent levels of comfort with lower energy costs and CO2 emissions, can be the answer, says Martin Passingham, Product Manager, DX at Daikin UK


P


ublic and private organisations are increasingly seeking highly efficient


whole building solutions for climate control. Heat recovery systems, delivering excellent levels of comfort with lower energy costs and CO2 emissions, can be the answer, says Martin Passingham, Product Manager, DX at Daikin UK.


BUILDING MANAGEMENT SYSTEMS The energy needs of modern buildings are becoming ever-more complex, with multiple requirements for lighting, internal climate control, hot water and refrigeration. However, these systems often operate separately, which can mean a huge amount of energy is wasted. Changes to Part L of the Building


Regulations, due in April, will impact building design further as it demands a 9 percent increase in efficiency for non- domestic buildings, compared with the 2010 Regulations. This, combined with a 33 percent rise in the cost of carbon ‘allowances’ for 2014-15 under the Government’s CRC Energy Efficiency Scheme (which affects all organisations in the UK except state-funded schools),


provides an extra imperative for energy efficiency to be improved. Fully integrated climate control systems


incorporating heat recovery can improve energy efficiencies. This is because heat recovery solutions can deliver high levels of comfort, while dramatically lowering running costs and carbon emissions in both new and refurbished buildings, driving savings on energy bills and surrendered carbon allowances.


HEAT RECOVERY SYSTEMS Heat recovery systems integrate heating, cooling, ventilation, air curtains and hot water, recovering “free” heat from areas requiring cooling and using it to heat others and to provide hot water. Daikin’s VRV heat recovery systems, for example, are suitable for any size of building. The latest version of the system, VRV IV, is on average 28 percent more energy-efficient than its previous incarnation. It is based around the VRV IV heat pump, which has a larger heat exchanger than previous models, so it uses less power, and features a number of innovations, including Variable


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consider how flexible a whole building climate control system is to be able to cope with changes to internal layout or room use. Modular systems such as VRV IV are ideal, as not only can they be scaled to fit the size of building, they can also be adapted to meet future demands. Flexibility is also a prime consideration for retrofit projects. VRV systems can be installed floor-by-floor to minimise disruption. Integrating heat recovery with other


building systems using intelligent controls can improve overall efficiency and reduce energy use further. For example, using presence sensors to detect room occupancy allows the automatic change of temperature settings or climate control to be switched off in unoccupied rooms. In fact, intelligent control of a heat


recovery system is crucial, as this allows energy consumption to be monitored across a range of equipment. This can pinpoint areas where the most savings can be made and ensures heating, cooling and ventilation levels are optimised to maximise comfort. Integrating heating, cooling,


refrigeration, hot water provision and ventilation is an excellent way to dramatically improve energy efficiency, lower CO2 emissions and save on energy bills. For organisations looking to achieve the highest levels of efficiency, save money on energy bills and reduce their carbon emissions, while maintaining high levels of comfort for building users, it is well worth considering a whole building solution with heat recovery.


Daikin UK www.daikin.co.uk O845 641 90 00


Enter 209 ENERGY MANAGEMENT | SPRING 2014 13


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