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Editorial The devil is in the detail. But the big picture has to be right! Dear Readers, The topics of energy efficiency and CO2 emissions are prac- tically omnipresent, and obviously also affect refrigeration and air-conditioning technology. Six different climate change scenarios were presented at the 4th Climate Conference 2007 (IPPC). An average tem- perature rise of at least 2 Kelvin over the coming decades was forecast with every scenario (even with those with a moderate CO2 emissions increase). In 2007, the Federal German Government has therefore set itself some very ambitious nationwide objectives. Among other goals, the Government committed to reducing CO2 emissions by 40 % by 2020 (compared to the emissions in 1990). Refrigeration engineering’s share of annual power require- ments in Germany is an incredible 15 %. It is therefore quite clear that we could very well make a contribution in our industry to reducing CO2 emissions with efficient systems and equipment. With the incorporation of savings potential it is no longer only individual components, such as the top consumer, the compressor, that are considered – optimization options for refrigeration/air-conditioning systems are now also sought (see article on German Refrigeration Award on pages 6 and 7). Manufacturers can draw on decades of development experience when dealing with the individual components. To some degree notewor- thy savings potential can only be achieved with difficulty, and for the most part also involve increased investment costs. But when considering the overall service life costs, with which the investment costs in the refrigeration and air-conditioning systems area only amount to 15 – 30 %, beneficial higher investment costs can be easily justified by a reduction in overall costs, and also have a positive effect on CO2 emissions. Savings potential that is at least as high if not higher, can, I believe, be found in the energy-conscious control of refrigeration and air-conditioning systems that are precisely adjusted to the framework conditions of the set-up location and the user’s requirements. An inte- grated coupling of the energy fluxes in the building area, on the factory premises, in the city district and even across and beyond this can now produce major savings. Our sights must always be set on the “big picture”, even if a bit more planning and development are required at the outset. Naturally we know that there are always numerous aspects to be considered with refrigeration and air- conditioning systems. Deliberations on the refrigeration/ air-conditioning system should always be front and foremost here. You won’t get far when trying to decide if the focus should be on energy efficiency or system safety (see article on lightning and over-voltage protection on pages 8 and 9), if you only consider one component and disregard the interaction of all individual areas. With the rising energy costs of the near future to say the least, you will then have both ecological and financial benefits to boost your success. Time is of the essence. Together we can, perhaps, stop things from getting too hot for us! Peter Roth Head of Basic Research, R&D Department 3PDF Image | heat X Change
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