Sökning: "cooling and secondary air system"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden cooling and secondary air system.

1. 1. ManagementPractical Aspects of Aqua Ammonia as Secondary Refrigerant in Ice Rinks

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Jacqueline Pierri; [2021]
   Nyckelord :Ice rink; secondary refrigerant; refrigeration; refrigerant management; secondary fluid; natural refrigerant; aqua ammonia;

   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

3. 2. EXPERIMENTAL STUDY ON PRESSURE LOSSES IN ADDITIVELY MANUFACTURED AND MACHINED ORIFICES : A rectangular geometry of additively manufactured MA 247 orice and a circular geometry ofmachined AW-6082 T6 orifice study

   Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära

   Författare :Jayadev Nambisan; [2020]
   Nyckelord :Cooling; Fluid Dynamics; Additive Manufacturing; Pressure Losses; Fluid Dynamics Testing; Machining; Gas Turbines; Gas Turbine Cooling; Nouveau Geometries;

   Sammanfattning : Gas turbine components for cooling purposes including other unique and complex three-dimensional designs could be made explicitly possible through additive manufacturing using SLM technology in contrary to the conventional machining processes. Nevertheless, the surface roughness and subsequently the friction factor governs thepressure drop in these components implicitly, thus, influencing the secondary air flow system of a gas turbine. LÄS MER

4. 3. Adaptation of Solar Energy Driven Absorption Chillers for Air Conditioning in Commercial Building

   Master-uppsats, Högskolan i Gävle/Avdelningen för bygg- energi- och miljöteknik

   Författare :Ranjith Shantha De Silva Kalinga; [2017]
   Nyckelord :;

   Sammanfattning : The most recent analysis of energy usage in the country reveled that nearly 50% of the power generation is used for air conditioning and mechanical ventilation most of which is used by commercial organizations. The grid generation mix that contains a high percentage of fossil fuel makes such energy usage environment unfriendly. LÄS MER

5. 4. Pressure loss characterization for cooling and secondary air system components in gas turbines

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Frida Isaksson; [2017]
   Nyckelord :Gas turbines; cooling and secondary air system; pressure losses; discharge coefficient; minor loss; one-dimensional modelling;

   Sammanfattning : There is a constant struggle to increase the efficiency in gas turbines, where one method is to have a higher inlet temperature to the turbine. Often, this results in temperatures higher than the critical temperature of the materials, which makes cooling of the components an important part of the turbine. LÄS MER

7. 5. Pinchanalys av det integrerade massa- och pappersbruket i Obbola

   Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

   Författare :Robin Matsson; [2017]
   Nyckelord :;

   Sammanfattning : The aim of this thesis is to investigate possibilities to reduce primary steam consumption of the integrated pulp and paper mill in Obbola. For this purpose, a pinch analysis has been performed. The thesis has been carried out on site and necessary data for the analysis was produced mainly using the sensors installed for controlling the process. LÄS MER