Sökning: "Ice rinks"
Visar resultat 1 - 5 av 28 uppsatser innehållade orden Ice rinks.
1. Comparative Analysis of Modern Energy Systems for Ice Rinks
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : Ice rinks are highly energy-intensive commercial buildings with an average annual energy consumption of 1,000 MWh, most of it being used to cover the simultaneous heating and cooling demands. The aim of this thesis is to find the most energy efficient energy system for ice rinks by evaluating different system modifications and refrigerants. LÄS MER
2. High Resolution Mapping and Spatial Analysis of Carbon Free Heat Sources for District Heating : A Case Study of Helsinki
Master-uppsats, KTH/EnergiteknikSammanfattning : Heat production together with electricity production stands for 31% of the global CO2 emissions. The production is as of today still highly dependent on fossil fuels, with a global district energy mix share of fossil fuels of 90%. LÄS MER
3. CO2 Refrigeration withIntegrated Ejectors : Modelling and Field Data Analysis ofTwo Ice Rinks and Two Supermarket Systems
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : With the increasing importance of CO2 as natural refrigerant with low Global Warming Potential(GWP) ejectors have been used in a number of recent installations to recover expansion work atthe high operating pressures of these systems. In colder climates, this is particularly seen in combinationwith heat recovery due to the high compressor discharge pressures. LÄS MER
4. ManagementPractical Aspects of Aqua Ammonia as Secondary Refrigerant in Ice Rinks
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : The transition from fluorinated gases to natural refrigerants could be key to reducing the impacts of climate change. Ice rinks are energy-intensive buildings, with large heating and cooling demands. The pumping power required to move the secondary refrigerant typically accounts for a sizable amount of the energy use of the refrigeration system. LÄS MER
5. Aqua Ammonia as Secondary Fluid in Ice Rink Applications
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : Refrigerant management is crucial in the attempts to slow climate change. Emissions from the refrigeration sector are primarily due to poor management and unsafe destruction of refrigerants currently in circulation. Safe refrigerant management and improving system operating efficiency can result in a reduction of emissions. LÄS MER