Joki

Joki. Towada, Japani.

Suvivirsi

Kaarilan lukion ylioppilasjuhla. Suvivirsi ja yleisöhälyä.

Kaupungin ääniä, Tokio

Kaupunkiääniä Tokiosta, mainoksia, askelia, metrotunneli

Reposaari

Reposaaren kalasatama, jäähdytyslaite käynnistyy ja sammuu. Lokkeja.

Kadun ääniä

Askeleita kadulla, autoja kulkee ohi, suihkulähde, vaimeaa puhetta. Hirosaki, Japani.

Meri

Voimakas meren aalto. Lasia menee rikki.

Japanilainen ravintola

Japanilainen ravintola, samisen-soitin ja taustalla puhetta. Hirosaki, Japani.

Itsenäisyyspäivän juhla Tampereen keskustorilla

Itsenäisyyspäivän juhlapuhe Tampereen keskustorilla, puhujana kaupunginjohtaja Jarmo Rantanen. Eläköönhuutoja ja taputuksia.

Metroasema Lontoossa

Lontoo. Metro on pysähtyneenä asemalla. Vaunussa puheensorinaa ja kuulutuksia. Metro lähtee liikkeelle ja pysähtelee asemilla.

Katu Hirosakissa, Japanissa

Kadun ääniä Hirosakissa, Japanissa. Askeleita, liikenteen melua, autoja ja polkupyöriä.

Metro

Metro saapuu asemalle Manchesterissä, Englannissa.

Kuumailmapallo

Kuumailmapallo. Taustalla lasten huutoja ja linnun laulua.

Statistical Analysis and Numerics of Heat Exchanger Models

The identifiability of the parameters of a heat exchanger model without phase change was studied in this Master’s thesis using synthetically made data. A fast, two-step Markov chain Monte Carlo method (MCMC) was tested with a couple of case studies and a heat exchanger model. The two-step MCMC-method worked well and decreased the computation time compared to the traditional MCMC-method. The effect of measurement accuracy of certain control variables to the identifiability of parameters was also studied. The accuracy used did not seem to have a remarkable effect to the identifiability of parameters. The use of the posterior distribution of parameters in different heat exchanger geometries was studied. It would be computationally most efficient to use the same posterior distribution among different geometries in the optimisation of heat exchanger networks. According to the results, this was possible in the case when the frontal surface areas were the same among different geometries. In the other cases the same posterior distribution can be used for optimisation too, but that will give a wider predictive distribution as a result. For condensing surface heat exchangers the numerical stability of the simulation model was studied. As a result, a stable algorithm was developed.

Utilização de solos locais para tratamento de efluentes do refino de petróleo contendo metais

The employment of local soils for extraction of metallic elements was evaluated through batch tests to treat wastewaters generated in a petroleum refinery plant in southern Brazil. Clay and organic carbon content and clay mineralogy provide these soils, in principle, with moderate metal retention capacity. The following retention order was established: Cr3+ > Pb2+ > Cu2+ > Hg2+ > Cd2+, with total amount of metals retained varying from 36 to 65 meq kg-1. The results show the high efficiency of local soils for extracting metals from liquid effluents through sorption and precipitation processes under acid pH conditions.

Sibelius-Akatemian lapsikonsertit 12. 3. 1977

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