Assessing the energy performance of VAV and VRF air conditioning systems in an office building located in the city of Florianópolis

Autores

  • Vanessa Paes Duarte Universidade Federal de Santa Catarina
  • Ana Paula Melo Universidade Federal de Santa Catarina
  • Roberto Lamberts Universidade Federal de Santa Catarina

Palavras-chave:

Cooling Energy Performance, Building Energy Simulation, VAV, VRF

Resumo

The objective of this study is to analyze the energy performance of two types of water-cooled air conditioning systems, variable air volume (VAV) and variable refrigerant flow (VRF), in terms of their cooling energy use through building simulation. These systems were designed to operate in an office building located in the city of Florianópolis, Brazil. The analysis involved the application of two building use schedules: a) constant and b) variable. Moreover, an analysis of the coefficient of performance (COP) and partial load ratio (PLR), and the percentage of operating hours for each range of cooling COP and PLR for each air conditioning system, allowed the system cooling efficiency to be assessed and the results to be related to the annual energy consumption. The coefficient of performance of VAV and VRF is 6.7 and 5.0, respectively, but the VRF system presented the lowest energy consumption for both schedules. The difference in the cooling energy consumption values for the VRF and VAV systems, for the variable schedule compared with the constant schedule, is mainly influenced by the partial load performance during the hottest period of the year.

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Biografia do Autor

Ana Paula Melo, Universidade Federal de Santa Catarina

Eficiência Energética em Edificações

Sustentabilidade

Conforto térmico

Análise de sensibilidade

Estratégias bioclimáticas

Publicado

2020-05-08

Edição

Seção

Artigos