In Stockholm, Johanneshov the Slaughterhouse area (Slakthusområdet) can be found. A number of companies have gathered there providing the Stockholmers with meat products. This area has a great need for cooling to supply large cold storages. To facilitate this, a central cooling system has been built, supplying the area with effective and safe cooling. The aim of this master thesis study is to give hints to energy efficient and reliable changes that can be put in place at a low marginal cost depending on the future activities in the area. The suggested changes will be presented to the company Bravida (managing the system), which also desires a deeper understanding of the energy flows through the central cooling system. Firstly visiting the site with proper guidance, we have then tried to understand the function of the system including which machines and media that are used. We have described the present design and come up with suggestions on how to improve the cooling system for a more efficient and safer cooling. Account has been taken to the fact that the whole area will be remodelled radically, thus the improvements must give a short payback time or have a value even after the remodelling. A conclusion drawn from our calculations is that the efficiency of the central cooling is low. The average COP 2(Coefficient of performance in the cooling mode) is around 1,2 which is low. That results in a high electric consumption. Apart from this unnecessarily high water consumption for the cooling tower has been has been observed. We have come up with some ideas to improve the system like:  Enhancing the insulation of the buildings, the pipes and the substation components.  Changing parts in the system like pumps valves and fluids  Introducing a new system for cooling the machines – a bedrock storage so that the heat can be utilized / I stadsdelen Johanneshov finner vi Slakthusområdet, där har ett konglomerat av företag (ca 240 st.) samlats för att förse Stockholm med kött, fläsk och charkprodukter. I detta område finns ett behov av stora kylrum och frysrum. För att underlätta det har man byggt ett centralkylsystem, som levererar effektiv och säker kyla. Syftet med detta examensarbete är att ge förslag på energieffektiva och driftsäkra åtgärder som kan iscensättas med små marginalkostnader beroende på områdets fortsatta verksamhet. Föreslagna driftsåtgärder presenteras för Bravida (driftansvarigt) som också önskar få en fördjupad inblick i centralkylans energiflöden. Genom besök på plats och guidning på området, har vi försökt att förstå hur hela systemet är uppbyggt, vilka aggregat och medier man använder. Vi har beskrivit den nuvarande utformningen och sedan kommit med idéer på vilka åtgärder man kan vidta för en effektivare, säkrare kyl- och frysproduktion. Hänsyn har tagits till att området står inför stora förändringar, så de åtgärder som föreslås är de som kan ge en kort återbetalningstid eller ha ett restvärde efter förändringarna. Metoderna för att komma fram till slutsatser var bl.a. beräkningar utgående från mätdata i bildform som vi fick av fastighetskontoret. Dessa bilder har omvandlats via flera OCR-dataprogram till Excel-filer. Ur dessa Excel-filer har vi sedan kunnat dra vissa slutsatser om energiförbrukningen i Slakthusområdet. Slutsatserna vi drog av dessa beräkningar är att centralkylan har en dålig verkningsgrad. Medelköldfaktorn (COP 2: Coefficient Of Performance) blir bara 1,2 vilket är lågt. Det medför att elenergiförbrukningen blir hög. Dessutom har man en onödig förbrukning av vatten i kylsystemets kyltorn. Vi har kommit med några idéer till förbättringar som:  Isoleringsförbättringar av klimatskal, rör och undercentraler.  Utbyte av delar i systemet som pumpar och ventiler.  Ett nytt avkylningssystem med ett bergvärmelager där den bortkylda värmen används.  Möjligheten att nyttja kyllagring.

<p>The aim of this thesis is to establish a “förvaltningsplans” template to Fastighetskontoret in Vasteras city. Further general information about the mission was given at our first meeting with Rolf Haraldsson, who happened to be our mentor and works at Fastighetskontoret in Vasteras city.</p><p>We agreed that using the software Excel was the most appropriate way to establish the template, because Fastighetskontoret also make use of Excel in their internal system, and also because Excel has a more friendly user interface and it is more easier to use compared to other software that have complex templates.</p><p>One of the first things we did was to get in contact with different fastighetskontors around Sweden so that we could either take part of their “förvaltningsplaner” or get referred to other material that could have been used. But this turned out to be an unsuccessful strategy. However, by searching on internet, course literature and databases we got a successful result.</p><p>The most common headlines were included in the template and were later discussed with our mentor from Malardalen University, Sone Nydert. Mr. Nydert who gave us viewpoints and directions on how we should develop our work further.</p><p>Thereafter, we had continual meetings with the mentor in Fastighetskontoret in Vasteras stad, Rolf Haraldsson, so that we could discuss and adjust the templates in line with the headlines in order for the template to match the fastighetskontorets internal headlines.</p><p>The template was finally tested in frosundaskolan and turned out to be a successful work.</p>

The aim of this thesis is to establish a “förvaltningsplans” template to Fastighetskontoret in Vasteras city. Further general information about the mission was given at our first meeting with Rolf Haraldsson, who happened to be our mentor and works at Fastighetskontoret in Vasteras city. We agreed that using the software Excel was the most appropriate way to establish the template, because Fastighetskontoret also make use of Excel in their internal system, and also because Excel has a more friendly user interface and it is more easier to use compared to other software that have complex templates. One of the first things we did was to get in contact with different fastighetskontors around Sweden so that we could either take part of their “förvaltningsplaner” or get referred to other material that could have been used. But this turned out to be an unsuccessful strategy. However, by searching on internet, course literature and databases we got a successful result. The most common headlines were included in the template and were later discussed with our mentor from Malardalen University, Sone Nydert. Mr. Nydert who gave us viewpoints and directions on how we should develop our work further. Thereafter, we had continual meetings with the mentor in Fastighetskontoret in Vasteras stad, Rolf Haraldsson, so that we could discuss and adjust the templates in line with the headlines in order for the template to match the fastighetskontorets internal headlines. The template was finally tested in frosundaskolan and turned out to be a successful work.