Uppbyggnad av HVAC-system för IKEA-varuhus - analys ur ett energiperspektiv
Typ
Examensarbete för masterexamen
Master Thesis
Master Thesis
Program
Publicerad
2006
Författare
Karlsson, Lisa
Televik, Hanna
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
IKEA is a world leading producer and supplier of furniture and interior decoration. When it comes to the use of energy in an IKEA store it is similar all over the world. The lighting equipment stands for the largest part of the use of energy and first runner up is air conditioning. It is therefore interesting to investigate how the choice of design and operating conditions influence the need for electric and heat power for HVAC system. This master thesis compares different design of HVAC systems from an energy point of view. The technical system designs which are studied are heat recovery units with different temperature efficiency, recirculation system and desiccant cooling. The use of energy is affected by the choice of operation, CAV or VAV, and this is therefore analysed. All calculations are performed for a climate similar to Gothenburg but the results can be applied to other climates. The power balance and energy balance presented for the building give the prerequisites for calculating the need for heating and cooling required for an IKEA store. The calculation model is based of the conditions valid for IKEA Bäckebol, a newly built store in Gothenburg, which is used as a reference object throughout the whole master thesis. The store is divided in three zones for the energy balance; self service, showroom and market place. The energy need for the different zones is estimated with a duration diagram of the outdoor temperature which is adjusted to the opening hours of the store. The diagram is a kind of bar chart which shows the duration for four interval of temperature. One conclusion is that self service at times has a need of heating, market place and showroom has on the other hand a need of cooling during the whole year. The analysis shows that VAV operation gives a considerably lower use of energy for market place and showroom. For self service the use of energy for the two alternatives CAV and VAV is equivalent. It can be established that a heat recovery unit with high temperature efficiency is very advantageous to the self service in terms of the use of energy. For the market place and showroom the use of energy is the same no matter what kind of heat recovery unit that is chosen. The system with desiccant cooling is not profitable from an energy point of view for any of the zones. However, this system was the most advantageous for the dimensioned summer case as well as the dimensioned winter case, which shows that the system with desiccant cooling with an advantage can be used in other climates.
Beskrivning
Ämne/nyckelord
Byggnadsteknik , Building engineering