The company premises of the web-fed offset printing plant WKS Kraft Schlötes from outside.

Welcome cooling for high-volume printing

In order to achieve sustainable improvements in its environmental performance, the web-fed offset printing company WKS Kraft Schlötes implements ISO 50001-compliant energy management. This involves continuously checking all processes for energy efficiency. These checks revealed that the water cooling system of the commercial printing press for brochure printing is an energy-intensive process. KSB won the contract to provide new pumps capable of achieving competitive energy and cost savings.

The Project: Pumps for a web-fed offset cooling water system

Radical changes in media consumption have exerted constant pressure on printing to become cheaper – while increasing in technical sophistication. If printing is to remain relevant in the age of digitalisation, it must be as cost-effective as possible. As web-fed offset printing presses become more powerful and complex, costs incurred during production-related downtime can increasingly spiral out of control. Against this challenging background, KSB was charged with finding an energy-efficient solution ensuring reliable operation.

The Customer: WKS Kraft Schlötes

Kraft Schlötes GmbH in Wassenberg, North Rhine-Westphalia, is a web-fed offset printing company that produces large volumes of brochures and newspaper supplements. It belongs to the WKS Group – which with 660 employees is one of Europe’s leading web-fed offset companies.

The web-fed offset printing press with printing webs seen from below — The web-fed offset printing press in operation

The challenge: Energy-efficient pumps and minimised downtime

In addition to achieving energy savings of almost 50%, KSB had another challenge to face: Web-fed offset printing plants of this size work in multi-shift operation around the clock, seven days a week. Under these conditions it was clear that modification of the cooling system had to minimise downtime for the printing press and ensure that production losses remained marginal.

The solution: Analysis, planning and implementation from one source

In collaboration with ENGIE, the specialist for heat dissipation systems in the printing industry, KSB began by evaluating data from the old pumps. The pump manufacturer then developed an energy cost calculation and determined which technology could be used to achieve the desired energy savings in the future. KSB was able to submit an offer for the new i.Cool cooling system from ENGIE which listed the total outlay for the new cooling system including all energy costs.

In terms of technology, the engineers opted for energy-optimised Etabloc pumps from KSB offering super premium efficiency to IE 4. Furthermore, the PumpDrive 2 variable speed system in combination with the PumpMeter pump monitoring unit ensured demand-driven operation and maximum energy savings.

Etabloc pump with PumpDrive 2 in a cooling unit — An Etabloc pump with PumpDrive 2

The next stage saw specialists from KSB and ENGIE develop a strategy for replacing the cooling complex without creating long downtimes. It was agreed that large sections should be prefabricated and kept ready during ongoing operations before being installed in comparatively short breaks.

ENGIE’s employees were trained by KSB to commission the Etabloc pumps after delivery without KSB supervision. Once again, the kind of well thought-out product package which KSB offers its customers and project partners proved its worth: KSB’s pumps can be configured and commissioned after only a short training period.

After the new cooling system had been in operation for one year, ENGIE collaborated with WKS Kraft Schlötes to verify the consumption figures. The energy savings predicted in the previously prepared extrapolation were indeed confirmed and – at more than 50% – were even higher than the projected forecast. For WKS, ENGIE and KSB, this was confirmation that their cooperation had got everything right, all the way from analysis to planning and implementation.

PumpDrive 2 variable speed system and Etabloc pump with web-fed offset printing press in the background — Cooling unit with PumpDrive 2 variable speed systems and Etabloc pump; web-fed offset printing press in the background.

Figures I Data I Facts

Plant: Cooling water system for web-fed offset printing plant

End user: WKS Kraft Schlötes

Prodct data:

13 x Etabloc pumps with PumpDrive 2 and PumpMeter

Commissioning training of ENGIE employees by KSB

Products used

Etabloc/Etabloc Pro/Etabloc MyFlow

Documente

Pompă cu carcasă spirală monoetajată, cu structură constructivă în bloc, cu puteri conform EN 733, cu sistem de acţionare compatibil cu IEC PumpDrive 2 cu SuPremE sau PumpDrive 3 din clasa de eficienţă IE4/IE5 conform IEC TS 60034-2-3:2016 şi convertizor de frecvenţă integrat în motor. Arborele este prevăzut în zona etanşării cu bucşă de arbore detaşabilă. Carcasa spirală şi capacul carcasei cu inel labirint carcasă detaşabil. Carcasă spirală cu picioare ale pompei turnate la varianta de execuţie B, C şi S. Puncte de fixare corespunzătoare IEC 60072, dimensiune înveliş conform DIN V 42673 (07-2011). Versiune ATEX disponibilă. Cu mult înaintea cerinţelor de eficienţă ale Directivei ErP.

Detalii

PumpDrive 2/PumpDrive 2 Eco

Documente

Convertizor de frecvenţă cu răcire autonomă cu structură modulară, care permite modificarea în trepte a turaţiei la motoarele asincrone şi sincrone cu reluctanţă prin semnale standard analogice, magistrală de date sau unitate de comandă. Prin răcirea autonomă a PumpDrive este posibilă montarea pe motor, pe perete precum şi într-un dulap de comandă. Reglarea a până la 6 pompe fără regulator suplimentar.

Detalii

PumpMeter

Documente

Dispozitiv de monitorizare a funcţionării unei pompe. Acesta este un înregistrator inteligent de presiune pentru pompe echipat cu afişaj al valorilor măsurate şi parametrilor de funcţionare la faţa locului. Înregistrează profilul de sarcină al pompei, pentru a semnaliza, atunci când este cazul, potenţiale de optimizare pentru creşterea eficienţei energetice şi a disponibilităţii. Aparatul este alcătuit din doi senzori de presiune şi o unitate de afişaj. PumpMeter este montat complet şi parametrizat pentru pompa respectivă din fabrică. Se conectează prin intermediul unui conector M12 şi poate fi pus imediat în funcţiune.

Detalii