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Lämmönsiirron numeerinen laskenta profiloidulle kanavalle.
(1998)
Työn tavoitteena oli tutkia aaltomaisen profiloinnin vaikutusta suorien jäähdytyskanavien lämmönsiirtoon ja painehäviöön. Erilaisia profiileja oli kymmenen kappaletta ja ne olivat 5mm leveitä ja 30cm pitkiä kukin. Ne ...
Verkostoyrittäjyys - Kouvolan pilottiprojekti
(1998)
Tutkimuksen tavoitteena on tutkia miten menestyvä yritysverkosto luodaan. Tarkoituksena on perehtyä yritysten perustamisen ja
verkostoitumisen teoriaan, joiden perusteella työn empiirisessä osassa analysoidaan Kouvolan ...
The Optimisation of the Draft Tube of a Hydro Power Plant at Off-Design Conditions
(1998)
Several possible methods of increasing the efficiency and power of hydro power plants by improving the flow passages are investigated in this stydy. The theoretical background of diffuser design and its application to the ...
Analysis and Control of Excitation, Field Weakening and Stability in Direct Torque Controlled Electrically Excited Synchronous Motor Drives
(Lappeenranta University of Technology, 1998)
Direct torque control (DTC) is a new control method for rotating field electrical machines. DTC controls directly the motor stator flux linkage with the stator voltage, and no stator current controllers are used. With the ...
Development a distributed simulation environment on a cluster of workstations
(Lappeenranta University of Technology, 1998-12-15)
Simulation has traditionally been used for analyzing the behavior of complex real world problems. Even though only some features of the problems are considered, simulation time tends to become quite high even for common ...
Improving the Potentials of Logistics Processes: Identification and Solutions
(Lappeenranta University of Technology, 1998-10-21)
The importance of logistics for companies is a well known and justified issue. Today, enterprises are developing their logistics processes in order to match their products and services to the requirements of the most ...
The value of future opportunities: comparison of information technology firms and forest companies
(1998)
There are several alternatives for valuing the future opportunities of firms. The traditional appraisal methods for single projects such as net present value, internalrate of return and payback rules have been criticized ...
Electrochemical Characterisation of Filter Media Properties and Their Exploitation in Enhanced Filtration
(1998-10-30)
Streaming potential measurements for the surface charge characterisation of different filter media types and materials were used. The equipment was developed further so that measurements could be taken along the surfaces, ...