(Etanorm pumps, pipes, valves and control units in the Stadtlohn-Hundewick waterworks)

More water pressure for Münsterland

Maintaining a high level of drinking water quality has been a top priority in Germany for decades, and almost all water supply utilities deliver this on a reliable basis. But another factor plays an equally important role in water supply: pressure. While water pressure drops and strong fluctuations are certainly a nuisance, they can also cause damage to appliances and equipment in households and industry. In order to avoid this, many water supply utilities have to adapt their pumping equipment to changing demand levels.

The project: Supplying Stadtlohn with sufficient water pressure

Stadtlohn’s utility SVS-Versorgungsbetriebe was struggling with fluctuating water pressure. At peak load times, water supply could no longer be guaranteed. Following a pressure drop of approx. 1 bar lasting over 3 hours, the decision was finally taken to redesign the clean water pumping station at the Stadtlohn-Hundewick waterworks. An additional objective was to achieve energy savings for the clean water pumps.

The customer: SVS-Versorgungsbetriebe

SVS-Versorgungsbetriebe provides the public energy and drinking water supply for the towns of Stadtlohn, Vreden and Südlohn (hence the name SVS), which are located in the western Münsterland region in the northwest of North Rhine-Westphalia. As well as providing electricity, natural gas and fibre-optic lines, SVS-Versorgungsbetriebe delivers an average of 2.9 million m³ of water per year to the local population as well as to industry, trade and agriculture via a network of pipelines stretching over 472.2 km.

(Multitec V pumps, pipes, valves and control units in the Stadtlohn-Hundewick waterworks) — Extremely space-saving, yet powerful: The Multitec V (front)

The challenge: Optimum water transport in confined spaces

The supply networks Stadtlohn and Südlohn lacked sufficient drinking water reserves. When quantities of around 400 – 440 m³/h were required, pressure dropped to 32 mWC and the clean water pumps were unable to transport the required quantity, despite the head of 42 mWC being clearly below their design point which at the time was known to be 54 mWC. The redesign also had to account for the extremely limited space available in the waterworks, which ruled out most horizontally installed pumps on the market.

The solution: Proven pumps with state-of-the-art control technology

The engineering company H2U was entrusted with the task of performing a fault analysis and developing a new plan. An extensive review of the performance data and an energy efficiency analysis of the waterworks yielded the following insights: The system lacked redundancy, offered unfavourable efficiencies and could not cope during high-demand periods as the pumping station was not designed for flow rates of more than 60 m³/h – even though these occurred 15% of the time.

The engineers decided to modify the piping and flow rates, with the work being carried out by the company A+H Anlagentechnik. The following factors were of primary importance: The system needed to become more flexible and energy efficient while offering a higher level of redundancy. In the Multitec V, KSB was able to offer a very efficient pump with frequency inverter (FI) which can also be operated via the latest high-tech interfaces. In addition, the pump can be installed vertically and thus fit perfectly into the confined space available. From a cost-benefit perspective, this was the best solution on the market.

The entire waterworks now employs KSB SuPremE^® motors controlled by frequency inverters. The water flow rates of the pumps controlled via frequency inverters can be read on the PumpDrive display. The frequency inverters can be operated very easily by means of a multi-line display and can also be set via Bluetooth using a smartphone. Using KSB SuPremE^® motors also delivered the desired energy savings. Here, the frequency inverters are additionally used to calculate the pumped flow rates, removing the need to purchase electromagnetic flow meters.

The cooperation of all parties involved went so well that KSB has already converted another waterworks in Vreden to using KSB SuPremE^® motors, PumpDrive 2 and KSB Guard.

Figures I Data I Facts

System: Waterworks
End user: SVS-Versorgungsbetriebe

Project data:

2x Multitec V
3x Etanorm
5x PumpDrive
5x PumpMeter
5x KSB Guard

Products used

Multitec

Dokumenty

Vodorovné alebo zvislé viacstupňové odstredivé čerpadlo s článkovou konštrukciou vo verzii základovej dosky a bloku, so sacím hrdlom axiálnym alebo radiálnym, odliatymi radiálnymi obežnými kolesami a systémom regulácie otáčok integrovaným v motore. Vyhotovenie ATEX je dostupné.

Detaily

Etanorm/Etanorm MyFlow/Etanorm Pro

Dokumenty

Jednostupňové čerpadlo so špirálovou komorou a procesnou konštrukciou, s výkonmi a hlavnými rozmermi podľa EN 733, s hnacím systémom PumpDrive 2 kompatibilným s IEC so SuPremE alebo PumpDrive 3 triedy účinnosti IE4/IE5 podľa IEC TS 60034-2-3:2016 a frekvenčným meničom integrovaným v motore. Čerpadlo má vymeniteľné štrbinové krúžky, uzavreté radiálne koleso s priestorovo zakrivenými lopatkami, jednoduché, ako aj dvojité tesnenia klznými krúžkami podľa EN 12756, hriadeľ v oblasti tesnenia hriadeľa s vymeniteľným ochranným puzdrom hriadeľa. Procesná konštrukcia umožňuje demontáž spojky, nosičov ložiska a obežného kolesa bez toho, aby sa teleso čerpadla muselo oddeliť od potrubí. Upevňovacie body zodpovedajú norme IEC 60072, rozmery plášťa podľa normy DIN V 42673 (07-2011). Vyhotovenie ATEX je dostupné. V porovnaní s požiadavkami na energetickú účinnosť podľa smernice o ekodizajne ponúka oveľa viac.

Detaily

PumpDrive 2/PumpDrive 2 Eco

Dokumenty

Frekvenčný menič s vlastným chladením a modulárnou konštrukciou, ktorý pomocou štandardných analógových signálov, prevádzkovej zbernice alebo ovládacej jednotky umožňuje plynulú zmenu otáčok asynchrónnych a synchrónnych reluktančných motorov. Vďaka vlastnému chladeniu PumpDrive je možná montáž na motor, na stenu alebo do skriňového rozvádzača. Regulácia až 6 čerpadiel bez ďalšieho regulátora.

Detaily

KSB Guard

Dokumenty

Inteligentná a komplexná monitorovacia služba pre čerpadlá a ďalšie rotujúce stroje – k dispozícii 24 h denne 7 dní v týždni a to bez ohľadu na výrobcu. Naším spoločným záujmom so spoločnosťou KSB je prediktívna údržba a úžitok z úplnej transparentnosti, zvýšenej dostupnosti, vyššej prevádzkovej bezpečnosti a efektívnej prevádzky (neregulovaných čerpadiel). Dôležité prevádzkové údaje, ako sú vibrácie, teplota, prevádzkové hodiny a stav zaťaženia (neregulovaných čerpadiel), sú kedykoľvek a kdekoľvek dostupné vďaka KSB Guard. Navyše ak dôjde k odchýlke od normálnej prevádzky, okamžite sa odošle oznámenie prostredníctvom webového portálu/aplikácie KSB Guard. Okrem toho odborníci z Monitorovacieho centra KSB poskytujú podporu pri analýze hlavných príčin.

Detaily