GRUNDFOS Direct Sensors™
One of GRUNDFOS Direct Sensors™ first customers were within IT cooling. We started in RACK cooling, where we today have most of the world’s largest players as customers. As chillers has become a more integral part of the complete control of the Datacentre, our experiences here has also been utilized by our partners within IT Cooling. Especially having the same sensor communication (BUS etc) from Chiller to CRAH units in the Datacentre has been seen as a plus. Since then we have moved from evaporative into more novel and high performance computing and cooling. Immersed cooling, CDU units and even chip cooling is now being performed with Direct Sensors™ inside. The product side has been developed in parallel with the IT Cooling industry as well as other industries. Our Generation 5 under continued roll-out is emphasizing the need for higher accuracy on the flow, pressure and especially the dT side. This newsletter is dedicated to our IT Cooling partners and specialists, and how our products tries to support the move towards more energy efficient systems and higher up-time for our OEMs.
We will however start with GRUNDFOS iSolutions, and simple how to do and build a simpler pump system thru combined transmitters measuring for instance pressure and temperature.
Simplify with GRUNDFOS iSolutions and Direct Sensors™
Compatible sensors with GRUNDFOS E-pumps means fewer measurement points, fewer choices, less installation hazzle and cost. Let’s make life simpler with GRUNDFOS iSOLUTIONS and DIRECT SENSORS™
RPI+T2 on Magna3 and TPE3
Request our application note on how to combine and connect the RPI+T2 transmitter to a Magna3 and TPE3 pumps.
Before presenting our new products, we will share what we have learnt from our more than a decade in the IT Cooling industry. 3% of the US’s electricity consumption is used by data centers. The server room in a non-manufacturing company is often the highest consumer of electricity. The most energy-efficient IT cooling systems are based on liquid cooling, and it is getting more and more common with various solution. As a rule of thumb, It requires 3 times as much flow and hence energy consumed to run a cooling system 1 degree to low compared to a heating system 1 degree to high. Having more accurate sensors will as such lead to significant lower energy consumption, and often more compact and less expensive cooling systems. This has been amongst the requirements driving us towards our improved flow, temperature and dT accuracy on our latest Generation 5+ sensors. Combining the Chiller, CRAH and CDU units with communication of the measured parameters such as T, dT, Pressure and Flow between and inside has become pivotal. With multiple sensors inside and between units, BUS communication is suddenly the talk of the town like at AHR 2019 in Atlanta this January.
Our partners are very high-tech companies, and secrecy is of course a must in how we operate. We are hence very grateful, that two very innovative companies Asperitas from the Nederlands and CoolIT out of Canada has agreed to share some of their new experiences with using our sensors in immersed and CDU cooling. Under other caser stories is also prior references like the global sharing of Schneider Electric (APC) with their in-row RACH cooling, and Thermal Engineering Systems out of the UK.
The generic collective experiences – focusing entirely on the sensors - is put in our latest leaflet to be downloaded.
In our new standard range of sensors for OEMs, we have radically improved the accuracy. Between “any” of 2 standard sensors (VFS, RPS, DPS and MFS), we obtain a dT of ± 0.3°C (± 0.54°F) for sensors.
- Accuracy 15-90°C (59-194°F): 0.3 K
- Accuracy 0-120°C (32-248°F): 0.5 K
By means of for instance a pressure or flow sensor with integrated temperature placed at the inlet and outlet of any water cooling circuit, an unseen differential temperature accuracy can be obtained between unpaired sensor. In general our VFS range of flow sensors has gotten their inaccuracy reduced by 1/3rd from 1½% FS to 1%.
- Accuracy (± 1 σ) in water, 0-120°C (32-248°F): ± 1% FS
With the new flow accuracy and dT accuracy, this means that our customers can start working on turning their units into EN1434 heat meter certifiable Chiller, CDU, CRAH, Rack etc. etc.
The pressure accuracy has also improved,
- Measuring range: 0 - 10 bar (0-145.0 psig)
- Accuracy (± 1 σ), 15-90°C (59-194°F): ± 1% FS
- Accuracy (± 1 σ), 0-120°C (32-248°F): ± 1.5% FS
and all standard sensors comes with a digi-analog interface. This entails, that our customers can continue using our standard analog signals, and later on develop a digital interface when systems gets connected or as the units mature. Going digital will release the full potential of the sensors enabling lower power consumption and lower the system costs.
We additionally have a one-wire bus version enabling up to 32 sensors on the same cable, which can be requested for any of our standard sensors. Also a 3in1 sensor measuring flow, pressure and temperature will be released during 2019. There are several new opportunities, which we are and will be offering you our partners during 2019, so you can develop even more energy efficient IT systems with a higher up-time.
- Asperitas provides high quality Immersed Computing® with Grundfos Direct Sensors™ (click to go to case)
- CoolIT (click to go to case)
- Other case stories (click to go to cases)
Grundfos Direct Sensors™ at AHR 2019
Grundfos Direct Sensors™ has been at the AHR since 2004. Besides having the sensors across Grundfos pumps and systems, several customers had Direct Sensors™ inside.
“The shows theme: "Discover what´s possible and we need more efficient and Intelligent Solutions" creates a leeway for our sensors in America, according to our Business Development Manager for North America and the Nordic countries, Lars Mejsner attending the entire show. “This was the best AHR show ever”. “We have the business now, and we have so many interesting projects running, that it is time for the next step within sensors in and for America”.
“Together with especially the Building Services and Industry teams of Grundfos in America, we are utilizing the focus there is on energy savings and optimization in and across America and Canada from everything from chillers to IT systems”. North America is trendsetting and developing IT systems, which will go everywhere in the world – and we together with our partners.
ISH (Frankfurt) in is coming up. Contact your local representative or your Direct Sensors™ to arrange a meeting. We will be there.