Thermal Performance of a Solarus CPC-Thermal Collector

The  aim  of  this  master  thesis  is  an  investigation  of  the  thermal  performance  of  a  thermal compound parabolic concentrating (CPC) collector from Solarus. The collector consists of two troughs with absorbers which are coated with different types of paint with  unknown  properties.  The  lower  and  upper  trough  of  the  collector  have  been  tested individually. In  order  to  accomplish  the  performance  of  the  two  collectors,  a  thorough  literature  study  in  the  fields  of  CPC  technology,  various  test  methods,  test  standards  for  solar thermal  collectors  as  well  as  the  latest  articles  relating  on  the  subject  were  carried  out. In addition, the set‐up of the thermal test rig was part of the thesis as well. The thermal  performance  was  tested  according  to  the  steady  state  test  method  as  described in the European standard 12975‐2. Furthermore, the thermal performance of  a  conventional  flat  plate  collector  was  carried  out  for  verification  of  the  test  method. The  CPC‐Thermal  collector  from  Solarus  was  tested  in  2013  and  the  results  showed  four  times  higher  values  of  the  heat  loss  coefficient  UL (8.4  W/m²K)  than  what  has been reported for a commercial collector from Solarus. This value was assumed to be too large and it was assumed that the large value was a result of the test method used that time. Therefore, another aim was the comparison of the results achieved in this work with the results from the tests performed in 2013. The results of the thermal performance showed that the optical efficiency of the lower trough of the CPC‐T collector is 77±5% and the corresponding heat loss coefficient UL 4.84±0.20  W/m²K.  The  upper  trough  achieved  an  optical  efficiency  of  75±6  %  and  a  heat loss coefficient UL of 6.45±0.27 W/m²K. The results of the heat loss coefficients  are  valid  for  temperature  intervals  between  20°C  and  80°C.  The  different  absorber paintings have a significant impact on the results, the lower trough performs overall better.  The  results  achieved  in  this  thesis  show  lower  heat  loss  coefficients UL and higher optical efficiencies compared to the results from 2013. 

Outdoor performance of forest seedlings pre-cultivated under artificial lights : effects of the light spectra used for pre-cultivation on the future establishment and development

Forest nurseries are essential for producing good quality seedlings, thus being a key element in the reforestation process. With increasing climate change awareness, nursery managers are looking for new tools that can help reduce the effects of their operations on the environment. The ZEPHYR project, funded by the European Commission under the Seventh Framework Programme (FP7), has the objective of finding new alternatives for nurseries by developing innovative zero-impact technologies for forest plant production. Due to their direct relationship to the energy consumption of the nurseries, one of the main elements addressed are the grow lights used for the pre-cultivation. New LED luminaires with a light spectrum tailored to the seedlings’ needs are being studied and compared against the traditional fluorescent lamps. Seedlings of Picea abies and Pinus sylvestris were grown under five different light spectra (one fluorescent and 4 LED) during 5 weeks with a photoperiod of 16 hours at 100 μmol∙m-2∙s-1 and 60% humidity. In order to evaluate if these seedlings were able cope with real field stress conditions, a forest field trial was also designed. The terrain chosen was a typical planting site in mid-Sweden after clear-cutting. Two vegetation periods after the outplanting, the seedlings that were pre-cultivated under the LED lamps have performed at least as well as those that were grown under fluorescent lights. These results show that there is a good  potential for lightning substitution in forestry nurseries.

Desafios na economia do conhecimento - o caso do BNDES

Land, capital and work dictated the organizations¿ success in the industrial era. Added to these factors, the intangible assets are considered the key complement to determine business¿ sustainability in the knowledge era. The globalization creates a new dynamic in the markets and the knowledge management becomes focal point to the organizations. It becomes more common the incorporation of inter-organizational nets to improve business, in a strategy win-win where the tacit knowledge, noncodified, which is shared. More specifically, the innovation management, one of the intangible assets aspects, plays an important role in the Federal Government agenda, through the PDP and other market players. BNDES made significant progress to assist companies¿ demands in the knowledge era, among them: the adoption of the Intangible Assets BSC methodology to evaluate companies¿ credit risk and the partnership with Brightom University (UK) to train innovation management to companies¿ managers. Besides the initial steps, what are the challenges that BNDES will face from now on? In the bibliographic review, it is analyzed the competitive factors in the knowledge era, the evolution of the intangible assets concept, the consolidation of the networking as business strategy, evaluation its advantages and disadvantages, some innovation definitions and its management through the identification of the development level of the Brazilian companies¿ in this aspect. After that, it is analyzed the management tool so-called Balanced Scorecard, which is fundamental to the Intangible Assets BSC. The actions already implemented by BNDES, Sebrae and FINEP focused on the subject are identified in order to evaluate the integration level among those actions. Then, it is demonstrated the relevancy of the subject not only to BNDES, but also to society. This study faces the subject by the preparation of a diagnostic from 30 actives SMEs investments from BNDESPAR portfolio, a BNDES subsidiary, adopting the BSC methodology through questionnaire. The objective is to certify if there is enough space to elaborate an action plan focused on creating value to companies considering them intangible assets and, if it is viable, how this toll can be useful and adequate to achieve such objective. The questionnaire content, answered by the training participants in the innovation management program, is also evaluated to check the suggestions of actions to maximize the expected feedback. In the conclusion, it is verified that the tool so-called Intangible Assets BSC is adequate to the management activity of the investments in PMEs from BNDESPAR portfolio and there is enough space to adopt measures focused on creation of companies¿ value, mentioning some examples and highlighting some preliminary academicals contributions to improve the tool and also suggests other steps that BNDES can adopt to optimize the actions already implemented.

The performance of open-end Brazilian fixed income mutual funds for retail clients

From a financial perspective, this dissertation analyzes the Brazilian mutual fund industry performance for an average retail client. The most representative funds for the local population, that are the fixed income open-end ones, will be selected and their performance will be measured aiming to answer if clients of this industry obtained a proper return over their investments in the period between August 2010 and August 2013. A proper return will be understood as the preservation of the purchasing power of the individual´s savings, what is achieved with a positive performance of a mutual fund after discounting taxes, administrative fees and inflation. After obtaining an answer for the previous question, this dissertation will explore a possible alternative solution: Tesouro Direto, that is an example of a financial approach that could foster the disintermediation between savings and investments through electronic channels. New electronic platforms, with a broader scope, could be utilized to increase the efficiency of funding productive investments through better remunerating Brazilian savings. Tesouro Direto may point towards a new paradigm.

Performance of incentive contracts in highway PPP projects in Brazil

Private-Public Partnerships (P.P.P.) is a new contractual model institutionalized in 2004 that could be used to remedy to the infrastructure deficit in Brazil. In a context of a principal and agent relation, the public partner goal is to give incentives to the private partner in the contract so that their interests are aligned. This qualitative research presents the findings of an empirical study examining the performance of incentive PPP contracts in Brazil in the highway sector. The goal is to explain how the contracting parties can align their interests in an environment of asymmetric information. Literature identified the factors that can influence PPP design and efficient incentive contracts. The study assesses the contribution of these factors in the building of PPP contracts by focusing on the case of the first and only PPP signed in the highway sector in Brazil which is the MG-050. The first step is to describe the condition of the highway network and the level of compliance of the private partner with the contract PPP MG-050. The second step is to explain the performance of the private partner and conclude if the interests of both partners were aligned in contractual aspects. On the basis of these findings and the analysis of the contract, the study formulates suggestions to improve the draft of PPP contracts from the perspective of the incentive theory of contracts.