Radiological and nuclear medicine center, Lauf a. Pegnitz, Germany.

Challenge / Generating strong magnetic fields requires particularly powerful solenoids, known as superconducting solenoids, which must be cooled to minus 269°C. Precision work of this nature requires an enormous amount of technology, with purchase costs ranging between 1.5 and 2 million euros – an investment that has to pay for itself as quickly as possible.

Solution / The Riedel Kooling MC chiller with an additional free cooler module on the roof ensures an efficient and reliable cooling supply. The goal is to avoid temperature fluctuations. At outside temperatures below 6°C, the free cooler uses the surrounding air as an additional source of cooling capacity. This results in lower power consumption. Total electricity costs per year have seen a reduction of as much as 5000 euros, and CO₂ emissions have fallen too.
 

Radiology at Raschplatz, Hanover, Germany.

Challenge / The key components of a superconducting MRI system must be precisely cooled, as this is essential to obtaining the sharp MRI images that are needed in this application. Keeping the entire cooling chain running reliably is always the top priority. Quiet operation is another important factor.

Solution / The planning engineers opted for a chiller from the MC series. Chillers of this type operate extremely quietly and fulfil the requirements for modern cooling solutions with refrigeration capacities between 40 and 75 kW. Various options create the possibility of devices in the style of a modular system. Remote control panels facilitate system control, energy-saving modules lower operating costs and system safety is increased with the installation of an emergency water supply module or filter kit.
 

How do cat litter bags actually become leakproof?
Or: How modern bag closing machines are cooled.

For over 60 years, Meypack in Nottuln-Appelhülsen has been an expert for solutions in the fields of carton packaging technology, film packaging technology, palletizing/depalletizing technology and bag closing technology. In a bag closing machine (also known as a continuous belt sealing machine), plastic bags are sealed or internally coated paper bags are sealed - in our case paper bags for cat litter. 

The paper bags are provided with a hot-melt adhesive edge in the upper area, which is first melted and then pressed and finally cooled under pressure. The adhesive is cooled using water-cooled cooling jaws, which are supplied with cold water from an SC series chiller. The water temperature is set to the required temperature value. The chiller is supplied ready for operation. The compact chiller can be easily attached to the machine to save space. And commissioning is quick and easy.

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KHS Corpoplast, Hamburg, Germany.

Challenge / The Blowmax blow-moulding machines consist of 13 performance types. In the past, up to 39 different chillers were available for these machines depending on the ambient temperature. The partners joined forces and started looking for ways to reduce the variety, while also increasing the competitive advantage through standardisation.

Solution / One chiller type for a defined pool of blow-moulding machines. Each chiller had to cover a specific refrigeration capacity depending on the volume flow and pump pressure, with an ambient tempera-ture of 45 °C. Based on this requirement, Riedel Kooling developed four chiller platforms with a power of 25, 40, 60 or 90 kW. The new platform solution has positive impacts for both sides. For KHS, the technical, commercial and logistical work is reduced. For Riedel Kooling, much less material has to be held in stock, the number of identical parts is increased and KHS orders defined, easily plannable quantities.

Automotive Supplier, Germany.

Plasma temperatures of around 600°C occur at the plant of an automotive supplier when engine components are being coated with a special PVD film. This is what creates the extremely high-quality components on which many large companies rely.

Challenge / In recent years, production has grown significantly due to increasing demand – and with it the need for cooling. The existing systems were still working, but used vast amounts of energy.

Solution / The correct temperature is now always guaranteed by two PC2241 (process cooling) and one PC2001 (air-conditioning) units from Riedel Kooling, each of which is combined with water-bearing free coolers. Process cooling and air-conditioning have been separated as they require different flow temperatures. The new cooling system has been moved outside and is controlled centrally via a control centre.
 

Paranal Observatorium, Chile.

In the middle of the Atacama Desert in northern Chile, four 22-watt lasers generate artificial guide stars. The purpose of these is to compensate for optical blurs caused by the Earth’s atmosphere and ensure that the telescope receives sharp images as a result.

Challenge / The laser sources need a compact, low-vibration cooling system that is neutral to external temperatures, requires as little maintenance as possible, and is equipped with leakage monitoring in case of an emergency. In this part of South America, earthquake and frost protection is also essential.

Solution / A cooling system that is so safe and low-maintenance that it can run unattended for two years. This is a huge advantage in an area far away from main traffic routes – and is made possible by factors including a special insulating material that does not swell, even at over 2,500 metres.