In many and various applications – for cooling and heating in processing industries, heat exchange in power plant engineering, as well as HVAC requirements – heat exchangers are indispensable for an advanced society. One good example is for the supply of district heat, in which large heat exchangers input energy from power plant heat processes into urban heating networks – and implement the required energy transfer to residential heating cycles.
GEA heat exchangers also contribute to good home and working climate. A significant share of advanced building services involves air treatment: at home, in offices, in hotels, for factories, and throughout public areas. For decades, the heating, cooling, cleaning, filtering, as well as humidifying and dehumidifying of air have been a core competency. The objective here is not only comfort, but also energy efficiency: after all, energy use in buildings – in addition to power plants, industrial processes, and transport – is responsible for a major share of world energy consumption. Building energy systems accordingly represent an immense potential for saving energy and for avoiding CO2 emissions.
For air treatment, GEA offers a comprehensive spectrum of centralized and decentralized air handling systems, chillers, control systems, filters, and precision climate-control units. In the application of such systems, planners and users can trust in the superior performance and efficiency of these GEA systems. Centralized units, for example, that provide climate control for buildings and computer centers with the aid of adiabatic cooling, offer great potential for enhancement of operational efficiency. If, within a certain facility, heating and cooling are required at the same time – for example, in an office building whose computer center must be cooled, also during the winter – heat transfer represents an attractive solution. Here as well, GEA has just the right solution in its portfolio. Decentral GEA systems such as fan coil units decouple the supply of air from heating or cooling sources and enable room users in this way to select their own, individual, and most comfortable room temperature. Independently of temperature, these systems furthermore efficiently supply clean and oxygen-rich air to their users.
GEA likewise intensively concentrates on air filters. GEA filters not only offer top filtration efficiency, but also keep pressure drop low: i.e., they offer a minimum of resistance to air flow, which lowers power consumption of the fans. This applies to filters in building ventilation as well as to industrial air filters.
GEA heat exchangers – plate heat exchangers and shell and tube heat exchangers – are employed in the supply of district heating, which link heating supply from power plants via transfer stations to the final user. These heat exchangers are, for example, also applied in geothermal engineering, solar-system separation, floor heating, and district cooling. Compact system design and clarity in investment calculation mean a maximum of heat-transfer rates.
Shopping centers, supermarkets, caterers, and cold storage warehouses require powerful and, above all, efficient refrigeration technology – since these systems represent the largest operating-cost factor in refrigerated warehousing. Reliable finned tube heat exchangers for refrigeration assure that the ecological footprint of the cold chain remains at a minimum and that consumers can enjoy an extensive offering of fresh fruit and vegetables, cold drinks, and ready-to-eat meals. These benefits are made possible by optimal, reliable supply of chilling and freezing.
Those who enjoy spending their leisure time in swimming pools or in indoor ski centers usually care very little about seeing or hearing the mechanical systems that make their enjoyment possible. This is why GEA air handling systems for indoor pools – as well as the GEA finned tube heat exchangers for refrigeration in indoor skiing – are designed to work discreetly in the background. For the same reason, GEA wet cooling towers, with their modular design, are used in especially large building complexes such as airports and factories. These systems can be especially planned to be installed where they are unseen and unheard.
The London Underground subway system places great importance on the comfort of its patrons – beginning with their wait on the station platforms. GEA refrigeration heat exchangers above the platforms operate with ground water and assure pleasantly cool temperatures in underground stations.
Thanks to the highly compact design of GEA cooling systems – owing to their innovative fin geometry – they have set new standards in the transport business for space requirements, weight, and use of material. In engines, the charge air, in addition to the fuel, is a key factor for efficient combustion. Around the world, finned tube heat exchangers from GEA increase the efficiency of diesel engines in locomotives for freight and passenger trains, as well as for heavy-haul trucks on the road. In addition, shell-and-tube heat exchangers cool transformer oil in electric locomotives and in other railway traction units.
GEA fill packs in wastewater-treatment facilities assure clean water – even in remote areas without highly functional infrastructure. With GEA trickling filter technology, the wastewater first passes through a coarse preliminary sedimentation step with structured packs. A biofilm grows on the water surface, which absorbs degradable substances – without sophisticated technology, with only very slight maintenance requirements, and with long service life.
In industrial production plants, heat exchangers can be found in operation everywhere. In many cases, heat exchangers are absolutely essential for the operation of electrical motors, internal-combustion engines, cogen power plants, and air treatment facilities. They are elementary constituents of any and all process engineering plants. The ecological footprint of an entire complex is not least determined by the efficiency of their heat exchangers. Greater efficiency of an refrigeration heat exchanger signifies reduced space and lower energy consumption. In comparison with systems with water as cooling medium, air cooling offers yet another positive side effect: it conserves water resources and prevents the heating of natural bodies of water. GEA is a pioneer here and is leading in the world in the field of industrial air cooling.
For years now, the factors economy and ecology have no longer been inimical: indeed, with GEA heat exchangers, they go hand in hand. We must conserve our finite resources, and rising raw-materials costs mean that reduced consumption also conserves the bank accounts of consumers.