Autor(es):
Silva, Diogo Bermejo Pereira Rodrigues da 
Data: 2013
Identificador Persistente: http://hdl.handle.net/10451/9666
Origem: Repositório da Universidade de Lisboa
Assunto(s): Energy efficiency; Ice rink; Dehumidification system; Teses de mestrado - 2013
Descrição
Tese de mestrado integrado em Engenharia da Energia e do Ambiente, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2013 Ice skating rinks are one of the largest energy consumers in terms of public buildings due to its simultaneous needs of cooling, heating, ventilation and lighting for different parts of the structure, which means that these facilities have also a lot of potential for saving energy. Saving energy from dehumidification systems in ice rinks is a subject that still needs to be developed and investigated with an increased focus in matters of energy efficiency in these types of structure. The performance of the dehumidification system of diverse ice rinks located near the city of Stockholm, Sweden, is here analysed in order to evaluate the use of energy related to indoor and outdoor climate. The connection of a district heating system to a dehumidifier in Älta ice rink is also investigated, with the final conclusion that the amount of electricity that the system is able to save is nearly 50%. There are two different types of dehumidifiers and their energy consumption is studied and further compared with the obtained values of energy usage by the refrigeration system to dehumidify the air using the ice slab. The results show that the ice slab uses much less energy comparing with the dehumidifier system (0,336 and 2,076kWh/kg water, respectively, in Älta ice rink case). The bibliography points out that the energy use related to dehumidification of an ice rink is 4 to 6% of the total ice rink energy consumption but, in this project, that real value is accurately quantified using proper equipment for Swedish ice rinks and observe that percentage is, actually, underestimated in the current “state of art”. At the moment, the number of ice rinks in Sweden is about 350 and the average of the annual energy consumption is about 1000 MWh/year. With current knowledge that the number of installations is growing in a rate of 5-10 per year in the country, energy saving measures are evaluated and studied in these facilities in order to upgrade the old structures and improve the new ones.
Tipo de Documento
Dissertação de Mestrado
Idioma
Inglês
Orientador(es)
Rogstam, Jorgen; Panão, Marta João Nunes Oliveira
