Simpósio Danfoss

  • Entrevista com Renato Nogueira de Carvalho, presidente do Departamento Nacional de Empresas Projetistas e Consultores da Abrava.

    - Quais são os principais desafios para obter eficiência energética em edifícios comerciais?

    Minha opinião é que a eficiência energética só será, realmente, uma realidade se entendermos que os projetos precisam ser desenvolvidos por equipes de trabalho e não especialistas que trabalham isoladamente. A eficiência energética é responsabilidade de todos e será tão melhor quanto maior for o envolvimento dos profissionais das chamadas disciplinas complementares, desde o início do projeto.

    - Quais são as principais tendências em tecnologias de HVAC para eficiência energética no segmento?

    Há algumas tecnologias que estão sendo difundidas no mercado, como sistemas de expansão direta, VRF e compressores centrífugos com a tecnologia de mancais magnéticos. Se considerarmos o tempo que o VRF já está no mercado e o aumento de fabricantes que estão atuando com esse sistema de ar condicionado, notamos uma concorrência interessante e que tende a beneficiar os sistemas VRF.

    - Quais são os diferenciais dessas tecnologias se comparadas com as convencionais?

    A principal diferença está voltada para a questão de consumo de energia elétrica do sistema de ar condicionado. Tanto os sistemas VRF como os compressores com mancais magnéticos são mais eficientes e reduzem as perdas do sistema. Nos dois casos os sistemas beneficiam-se de outras vantagens, tais como melhores rendimentos em cargas parciais, menores níveis de ruído, entre outras.

    - O Brasil está equiparado tecnologicamente com outros países?

    Sim. Atualmente, estão atuando no Brasil empresas que são filiais ou que representam os principais fabricantes de equipamentos de ar condicionado do mundo. É claro que ainda convivemos com questões econômicas que dificultam a aplicação de equipamentos de ponta. Sabemos que muitas vezes equipamentos de melhor eficiência energética são preteridos para que os investimentos sejam ajustados aos valores de referência impostos pelos investidores, mas as tecnologias estão ao nosso alcance e para que elas sejam utilizadas precisamos estar familiarizados e entendermos suas melhores aplicações.

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