Sökning: "hydro power"

Visar resultat 21 - 25 av 87 avhandlingar innehållade orden hydro power.

1. 21. Ventilation of a Model Hydro-Generator, An Experimental and Numerical Study

   Författare :Hamed Jamshidi; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFD; Ventilation; Hydro Power Generator; Experiment;

   Sammanfattning : Generators are sophisticated machines used to convert the mechanical energy of a prime mover into electrical energy. Electromagnetic and mechanical losses accompany this energy conversion process. Cooling systems remove the heat, generated by losses, from these machines. LÄS MER

3. 22. Electricity Market Design Strategies for Hydro-dominated Power Systems : Exploring Optimal Bidding, Planning, and Strategic Operation through Various Market Design Strategies

   Författare :Abolfazl Khodadadi; Lennart Söder; Audun Botterud; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nordic Balancing Model; Electricity Market Designs; Stochastic Optimization; Contract-for-Difference Contracts; Nordiska Balanseringsmodellen; Design av Elektricitetsmarknader; Stokastisk Optimering; Kontrakt- för-Skillnad Kontrakt; Electrical Engineering; Elektro- och systemteknik; Nationalekonomi; Economics;

   Sammanfattning : The existing wholesale power markets in Nordic countries play a vital role in ensuring the planned balance between supply and demand. However, these markets do not guarantee real-time operational security of the power system. LÄS MER

4. 23. On maintenance management of wind and nuclear power plants

   Författare :Julia Nilsson; Lina Bertling; Ulf Sandberg; KTH; []
   Nyckelord :electrical poduction systems; windpower; nuclear power; maintenance management; RCM; RCAM; LCC; mathematical optimization; opportunistic maintenance;

   Sammanfattning : Electrical production in Sweden today is mainly from nuclear and hydro power. However, there is large increase in renewable energy like wind power and the installed new capacity goals are large. Several electrical production sources are important for the sustainability of the energy system. LÄS MER

5. 24. Ventilation Flow Field Characteristics of a Hydro-Generator Model- An experimental and Numerical Study

   Författare :Hamed Jamshidi; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Naphthalene Sublimation Technique; Hydro Power Generator; Ventilation; Experiment; CFD;

   Sammanfattning : Hydro-generators are complex machines used to convert the mechanical energy of the water turbine into electrical energy. Electromagnetic and mechanical losses accompany this energy conversion process which will cause heat generation and temperature increase. Cooling systems are needed to remove this excess heat from hydro-generators. LÄS MER

7. 25. Transfer of technical training know-how : a study of consultancy services in aid practice

   Författare :Sigurd Johansson; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; transfer; training know-how; technology transfer; aid; consultancy services; participatory case study; hydro power;

   Sammanfattning : In this thesis an aid financed attempt to transfer technical training know- how in the form of consultancy support is described and analysed. Between 1992 and 1996 Swedish consultants acted as advisers during the establishment phase of the Aswan training centre. LÄS MER