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A study on energy efficiency in system development environments and related equipment
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The modern society and its basic functions are dependent on different type of energy carriers. The usage of electronic appliances and computers in particular, has varying impact on energy usage, which in turn influence the performance of the cooling systems and the experienced thermal climate conditions in buildings. This study analyzes the energy usage within system development environments at Saab facility in Järfälla. The work process was divided in two parts; identifying the current energy consumption level in the system development environments and investigating potential energy efficiency measures that can be implemented. An evaluation on the defined energy systems showed that computer labs and related equipment as well as components associated with the cooling system used 64 % of the total energy demand in D building at Saab´s facility. Based on these results, several energy efficiency measures are proposed that would have significant potential to reduce the current energy usage and generate economic savings with low or no impact on the business activities and indoor thermal conditions. One of the most important findings was that the usage patterns of computers and monitors have a considerable contribution to the heat loads. It was shown that improved power management in computers placed in the system development environment could decrease the total energy consumption of cooling and electricity by 569 MWh per year. A final analysis emphasizes the importance of the location of the system development environments, as this factor is highly significant for an efficient reduction of the cooling demand in the existing building.

Abstract [sv]

Det moderna samhället och dess grundläggande funktioner är beroende av diverse energibärare. Användning av elektroniska utrustningar och i synnerhet datorer kan ha varierande effekter på energianvändning, vilket i sin tur påverkar performansen av kylsystem och det upplevda termiska klimatet i byggnader. Denna studie har som mål att undersöka energianvändningen inom systemutvecklingsmiljöer på Saab AB i Järfälla. Arbetet utfördes genom två etapper: identifiering av det nuvarande energibehovet inom systemutvecklingsmiljöer och att analysera de potentiella energieffektiviserande åtgärderna. Utvärderingen av energisystemet visade att energibehovet i datalabbar och relaterad utrustning samt de associerade kylsystem komponenter utgör i dagsläge 64 % av de totala elektricitetskostnaderna i D huset på Saab fastighet i Järfälla. Baserad på detta resultat, ett antal energieffektiviseringsåtgärder som kan minska the nuvarande energiförbrukningen och kostnader föreslogs, vilka förväntas att inte ge påtagliga effekter på affärsverksamheten och inomhusklimatet. Användningsmönstren av datorer och skärmar visade sig att ha en betydande påverkan på värmebelastningen i dessa miljöer. Beräkningarna visade att installera energisparlägen utanför arbetstiderna i datorer placerade i systemutvecklingsmiljöer kan minska den totala energianvändningen för kyla och el med 569 MWh per år. En slutlig analys betonar vikten av placeringen av systemutvecklingsmiljöerna, vilket är en signifikant faktor för en effektiv minskning av kylbehovet i den befintliga byggnaden.

Place, publisher, year, edition, pages
2017. , 94 p.
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-211710OAI: oai:DiVA.org:kth-211710DiVA: diva2:1130515
Supervisors
Examiners
Available from: 2017-08-10 Created: 2017-08-10 Last updated: 2017-08-10Bibliographically approved

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