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Scritto da Rodigari Mario   

03 Giugno 2012

Data center: basta sprechi con Schneider Electric

La divisione IT della società presenta un tool gratuito per valutare le strategie di raffredamento dei centri dati e tagliare fino al 70% della spesa energetica iniziale. In base alle specifiche caratteristiche di ciascuna struttura è possibile individuare i metodi di cooling più ecologici ed economici.
Come tenere sotto controllo la temperatura nei data center, ottimizzando costi e dispendio energetico? Una risposta universale, secondo Schneider Electric, non esiste, ma è anzi importante valutare le singole situazioni per individuare soluzioni ad hoc: da oggi, è possibile farlo attraverso il tool online gratuito Cooling Economizer Mode PUE (Power usage effectiveness) Calculator, che misura l’efficienza dei centri dati con l’obiettivo di ridurre i livelli di Power usage effectiveness, i costi energetici e le emissioni di anidride carbonia.
Secondo l’azienda, attiva nel segmento data center attraverso l’acquisita APC, con le tecnologie di free cooling, come il raffreddamento ad aria, e operando il modalità “economizer” è possibile ridurre fino al 70% la spesa energetica complessiva del sito, e in particolare far calare di oltre il 15% su base annua il cosiddetto Pue. Le percentuali di ottimizzazione dipendono anche dal contesto climatico in cui il sito è inserito, nonché dall’ambiente operativo IT.
All’utente, non a caso, è richiesto di inserire informazioni dettagliate sul data center da valutare, incluse la collocazione geografica, la capacità in kW, la percentuale di carico IT, il tipo di ambiente operativo, la temperatura di ingresso, lo stato dell’alimentazione e dell’illuminazione. Per quanto riguarda la variabile climatica, lo strumento basa i suoi calcoli sui dati metereologici provenienti dalla American Society of Heating, Refrigerating and Air Conditioning Engineers.
Il Cooling Economizer Mode PUE Calculator mette a confronto sette tipi comuni di architetture di raffreddamento, inclusi sistemi ad acqua, a glicole, ad aria e sistemi basi. Nel dettaglio, le alternative considerate sono: refrigeratore con torre di raffreddamento e unità Computer Room Air Handling perimetrali; il medesimo, ma con scambiatori di calore a piastre e telaio; refrigeratori in struttura containerizzata, con dry cooler e unità CRAH disposte su file; sistemi perimetrali Computer Room Air Conditioning a espansione diretta con dry cooler; condizionatori d’aria con aria fredda diretta e sistema evaporativo; condizionatori d’aria con scambiatore di calore rotativo e sistema evaporativo; cooler ad aria.
Le informazioni elaborate dal calculator riguardano il PUE annualizzato relativo al solo sistema di cooling, il costo energetico annuale, le emissioni di gas serra annuali e il numero di ore di funzionamento in modalità economizer totale o parziale disponibili, in funzione del tipo di architettura utilizzato e del luogo in cui il data center si trova.

Ritorno all'Indice
e 2012
Desigo V5: Innovations from Siemens increase building efficiency
The Siemens Building Technologies Division has introduced version 5 of its Desigo building automation system. Its innovative products such as Total Room Automation as well as efficiency features, like RoomOptiControl and Eco Monitoring, give building operators and users an active role in energy management, leading to permanent reductions in energy and maintenance costs.
A state-of-the-art building automation system is always optimized for energy-efficient operation. However, these optimized settings may start to drift over time. One of the underlying causes is often a lack of transparency for users who simply don't know how the setpoint changes they make can impact energy consumption. This is particularly true for air-conditioned rooms which are also equipped with lighting and sun protection controls. The new version of Desigo keeps room users and building operators apprised of the building's efficiency status. Feedback to users is given using the innovative Green Leaf display, adapted to the expertise and control options of each user group. The system makes it possible to change settings if needed to restore optimal energy efficiency. A study by Technische Universität München (TUM) indicates that by actively involving operators and users in the energy management of a building, energy consumption can be reduced by up to 25% without affecting comfort.
Total Room Automation offers energy savings without reducing comfort
The open, programmable room automation range Desigo Total Room Automation (TRA) is a holistic solution encompassing the HVAC, lighting and shading disciplines. Desigo TRA uses an innovative efficience feature called RoomOptiControl. It automatically detects unnecessary energy consumption in the room and notifies users by changing the color of the Green Leaf icon on the QMX3 room control unit: If room operations are energy efficient, this icon is green. If settings made by a room user lead to unnecessary energy consumption, the icon turns red. To reset room control to energy efficient operation, the user simply presses the display and the Green Leaf icon returns to green.
Using BACnet/IP, PXC3 room automation stations—also part of the TRA package—are integrated seamlessly into the PX automation level with its primary systems (heating generators, HVAC main units and cooling generators). The primary systems are controlled directly through the demand signals from the rooms. This means that the primary systems are only turned on if needed and their operation is adjusted so it meets the room requirements without exceeding them. One room automation station can cover multiple rooms. TRA offers complete integration of KNX, DALI and EnOcean devices; existing or new sensors and actuators from Siemens can be incorporated as well.
Eco Monitoring to reduce energy consumption and wear
Eco Monitoring is another innovative efficiency feature of Desigo. It monitors ongoing operations of HVAC systems based on energy-related quality condition indicators such as readings from temperature, humidity and pressure sensors, runtime, switching behavior and operational performance of the systems. Should deviations from the target state, inefficient operations or increased energy consumption occur, the building operator is notified via the Green Leaf display on the Desigo Insight management station. Current and future international standards (such as EN 15323:2007) require such a feature in order to optimize building operations over the long term.
Desigo Eco Monitoring not only helps optimize energy consumption, it also reduces wear. Thanks to its dynamic behavior and timely reporting, the Eco Monitoring feature recognizes unfavorable system operations early on, allowing operators to intervene immediately before any negative impact occurs. If desired, operators can choose to be notified of unusual events via text messaging (SMS), fax or e-mail.
Expanded networking of the automation level
Starting with version 5, Desigo also offers expanded end-to-end networking of the automation level. Enhanced support for communications standards ensures efficient system integration. The PXC series of compact automation stations has a higher number of universal inputs/outputs, which makes them much more flexible. To protect existing investments, different device generations, such as PTM and TX I/O modules and RXC room controllers, can be used in parallel on the same PX automation station.

Ultimo aggiornamento Domenica 03 Giugno 2012 19:42