The construction sector today accounts for 20 precent of Sweden's climate impact and 40 percent of energy use. This purpose of this study is to identify the most effective measures to reduce the grocery store's energy needs. The building is tempered primarily with district heating respectively district cooling that operates the air units' cooling and heating batteries. There are many efficiency measures that are feasible for grocery store's energy usage. This study calculates a under construction grocery store's energy needs and analyses which measures can reduce the total need for purchased energy. This study calculates both property energy and industry energy and then compare the economy and environmental impact of the various measures. This store has also been environmentally certified according to the Sweden Green Building Council system. The simulation program IDA ICE is an effective tool that allows information in the form of energy analysis to be evaluated. This study compares the retail chain's own energy solutions with new innovative solutions that can save energy and money. This study's focus is on energy saving measures from ventilation systems, cooling systems and heating systems. Measures examined in this study are: •         Solar cells on the property's roof •         Additional insulation of ceilings and floors •         Heat recovery of the grocery refrigeration system •         Heat recovery of the industry ovens The total property energy was 2,000 MWh or 150 kWh/m2. Heat recovery of the cooling system saves 500 MWh annually, which corresponds to 37 kWh/m2. Installation of 4,000 m2 of solar cells saves 480 MWh, which corresponds to 35 kWh/m2. The measure that is most optimal from an energy point of view is heat recovery from the refrigeration system. The measure that is most economically profitable is the installation of solar cells. The measure that saves the most carbon dioxide is heat recovery from the refrigeration system. The comparison showed that heat recovery is the most profitable measure. After the implementation of all measures, the store reaches Swedish environmental class "environmental building gold".

Ice rinks are energy intense industrial applications. A typical single sheet ice rink in Sweden uses about 1000 MWh/season. A state-of-the art ice rink systems can use less than 500 MWh/season, indicating the potential for improvements. According to several investigations CO2 refrigeration system with heat recovery has proven to be energy-efficient and cost-effective solution in ice rinks.To further improve the efficiency, geothermal function may be added feature. The objective of this study is to evaluate the geothermal function from techno-economic perspective for a typical ice rink in Sweden. Modelling of several scenarios has been performed. Obtained results suggest that CO2 refrigeration system with 2-stage heat recovery, if upgraded with geothermal function, can save between 1.7 to 6.8% of energy annually. In the best case, this study suggests the geothermal function would pay back in 16.4 years. / Ishallar är energikrävande industriella applikationer. En typisk ishall i Sverige använder cirka 1000 MWh / säsong. Ett toppmodernt ishallsystem kan använda mindre än 500 MWh / säsong, vilket indikerar stora förbättringsmöjligheter. Enligt flera undersökningar har CO2-kylsystem med värmeåtervinning visat sig vara energieffektivt och kostnadseffektivt i ishallar.För att ytterligare förbättra effektiviteten kan geotermisk funktion läggas till. Syftet med denna studie är att utvärdera den geotermiska funktionen ur ett tekno-ekonomiskt perspektiv för en typisk ishall i Sverige. En modellering av flera scenarier har utförts. Resultaten antyder att CO2-kylsystem med 2-steg värmeåtervinning, om det uppgraderas med geotermisk funktion, kan spara mellan 1,7 och 6,8% energi årligen. I bästa fall antyder denna studie att den geotermiska funktionen skulle betala tillbaka om 16,4 år.