This thesis investigates the feasibility and benefits of integrating Thermochemical heat Storage (THS) into a CHP (Combined Heat and Power) plant. A case study is done for the CHP-plant in Sala, Sweden, with a maximum heat output of 20.9 MW and maximum electricity output of 9.6 MW. The THS type considered is calcium oxide in a hydroxide system. The fluctuations in electricity price for years 2020, 2030 and 2040 are considered and low-price electricity is used as a charging source for THS. During charging the superheated steam (endothermic reaction) is used to cover some of the district heating demand. The high temperature discharge from the THS is used as reheat in the Rankine cycle. The operations are modeled in Ebsilon and optimization is done in MATLAB using genetic algorithm with the objective to achieve maximum annual revenue. The results suggest that it is not feasible to introduce THS with electricity as a charging source in year 2020, but in 2030 and 2040 THS shows promising potential. The biggest increase in revenue comes from reduced fuel consumption, and, to a lesser extent, increased income from electricity. It is concluded that Calcium hydroxide is a promising candidate for integration into CHP during large electricity price fluctuation. The main drivers for the feasibility of this combination are high fuel price and large fluctuations of electricity price.

Made available in DSpace on 2016-07-27T14:20:52Z (GMT). No. of bitstreams: 1 Maira Ribeiro Magri.pdf: 752733 bytes, checksum: af7ce31e8751e2549e6bc05bca14762c (MD5) Previous issue date: 2015-12-16 / This study aimed to compare the effects of FAP and THS interventions on behaviors related to social skills class (or social anxiety disorder) of an adult participant with social phobic, to assess the level of anxiety during the intervention and between sessions, and to compare the results of the SPIN and IHS before and after the intervention and compare. For that, it was used an AB1CB2 multiple baseline design between behaviors where A was the baseline phase, B1 and B2 were phases in which two classes of behavior (C1 and C2) were submitted to FAP interventions and other two (C3 and C4) were submitted to THS interventions, and C was intervention phase classes of behavior (C1 and C2) were submitted to THS interventions and other two (C3 and C4) were submitted to FAP interventions. The results showed an increase in the frequency of occurrence of classes throughout the sessions and the highest frequencies were in the sessions of FAP. The participant related a higher level of anxiety in THS sessions compared to FAP. The application of the instruments, showed no difference between aplications before and after interventions. The data indicated that FAP may be effective in the interventions for social skill behaviors. However, further studies should be performed either to evaluate the generalization and for provide more evidence of the effectiveness and provide the area of research and application the possibility of providing more effective treatments to behavior problems. / O presente estudo teve como objetivo comparar os efeitos das intervenções FAP e THS nas classes de comportamentos relacionados a habilidades sociais (ou ansiedade social) de um participante adulto fóbico social, comparar os resultados das aplicações do SPIN e do IHS antes e depois da intervenção; avaliar o nível de ansiedade ao longo da intervenção e entre as sessões. Para isso, foi utilizado um delineamento AB1CB2 de linha de base múltipla entre comportamentos sendo A a fase de linha de base, B1 e B2 as fases em que duas classes de comportamento (C1 e C2) passaram por intervenções FAP e outras duas (C3 e C4) por intervenção THS e C a fase em que as classes C1 e C2 passaram por THS e C3 e C4 foram submetidas a intervenção FAP. Os resultados apontaram um aumento na frequência de ocorrência das classes de comportamento sob intervenção ao longo das sessões, com maiores frequências nas sessões de FAP. O participante relatou maior nível de ansiedade nas sessões de THS comparado às de FAP. Em relação às aplicações dos instrumentos, não foi possível observar diferença entre as aplicações realizadas antes da linha de base e ao final das intervenções. Os dados indicaram que a FAP também pode ser eficaz no tratamento de comportamentos relacionados a habilidades sociais. Contudo, novos estudos devem ser realizados tanto para avaliar a generalização como para fornecer mais evidências da eficácia e prover à área de pesquisa e de aplicação a possibilidade de fornecer tratamentos mais eficazes aos comportamentos problemas.