Repository logo
 

Search Results

Now showing 1 - 3 of 3
  • Caracterização energética e ambiental de recuperadores de calor para lareiras
    Publication . Nunes, Manuel; Sousa, Nelson; Santos, Carlos Miguel Andrade; Lamarão, António Hugo; Major, Virgílio
    O presente projecto nasceu da colaboração entre a Área Departamental de Engenharia Mecânica (ADEM) da Escola Superior de Tecnologia/Universidade do Algarve (EST/UAlg) e a empresa Vale Montanha, Serviços de Engenharia Lda, com o objectivo de caracterizar recuperadores de calor para lareiras e respectivos combustíveis.
  • Thermal performance in a conventional fireplace and in an inset appliance
    Publication . Sousa, Nelson; Nunes, Manuel; Santos, Carlos Miguel Andrade
    The objective of this study is to compare the performance of the equipment currently employed in the domestic heating with firewood, the conventional fireplace and the inset appliance with close firedoors. For such, it was followed the European Standard EN13229:2001/A2:2004. Efficiency and heat output is determined and the major heat losses that penalize the appliance performance are identified and calculated. Tests in laboratory were developed in two inset appliances, and tests in situ in one conventional fireplace. One of the appliances uses only staging as primary air, and the other only grate air In inset appliances, with a heat output near 10 kW, the average efficiency varies between 67% and 73%, while in a conventional fireplace that value lies at 30%. In all these devices the major losses take place as sensible heat in the flue gases, 23% to 30 % in inset appliances and above 50% in a conventional fireplace. The second most important heat loss happens by chemical losses in the flue gases. It takes values near 17% in a conventional fireplace and may be disregarded in an inset appliance.
  • Caracterização energética e ambiental de recuperadores de calor para lareiras: manual de operações, resultados
    Publication . Nunes, Manuel; Sousa, Nelson; Lamarão, António Hugo; Santos, Carlos Miguel Andrade; Broad, David; Stadler, Rudolf