Research Papers

Application of Energy Conservation Measures and Their Impact on the Thermal-Energetic Performance of a Building in the Brazilian Amazon Region: A Case Study

[+] Author and Article Information
Heliana M. C. Aguilar

Grupo de Estudos e Desenvolvimento de
Alternativas Energéticas (GEDAE),
Instituto de Tecnologia (ITEC),
Universidade Federal do Pará (UFPA),
Campus Universitário do Guamá,
Belém 66.025-772, Pará, Brazil
e-mail: aguilar@ufpa.br

Marcos A. B. Galhardo

Grupo de Estudos e Desenvolvimento de
Alternativas Energéticas (GEDAE),
Instituto de Tecnologia (ITEC),
Universidade Federal do Pará (UFPA),
Campus Universitário do Guamá,
Belém 66.025-772, Pará, Brazil
e-mail: galhardo@ufpa.br

João T. Pinho

Grupo de Estudos e Desenvolvimento de
Alternativas Energéticas (GEDAE),
Instituto de Tecnologia (ITEC),
Universidade Federal do Pará (UFPA),
Campus Universitário do Guamá,
Belém 66.025-772, Pará, Brazil
e-mail: jtpinho@ufpa.br

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received July 11, 2017; final manuscript received December 8, 2017; published online February 27, 2018. Assoc. Editor: Jorge Gonzalez.

J. Sol. Energy Eng 140(3), 031005 (Feb 27, 2018) (13 pages) Paper No: SOL-17-1281; doi: 10.1115/1.4039274 History: Received July 11, 2017; Revised December 08, 2017

This paper focuses on the thermal and energetic behavior of a building located in the Brazilian Amazon Region, a region climatically characterized by elevated temperatures and high humidity levels, where achieving adequate thermal comfort demands a high-energy consumption due to the use of air-conditioning systems. Therefore, different energy conservation measures (ECMs) need to be evaluated to reduce the thermal load for cooling. The use of a thermal insulation material on the west wall and on the roof, and a photovoltaic (PV) system integrated as an architectural element and adapted to the roof of the building are considered. The building is simulated with the software energyplus, with its thermal behavior and energy consumption analyzed for an entire year and for a chosen design day, defined with data measured by a weather station installed close to the building. According to the evaluations carried out, it is determined that the ECMs have a direct and major influence on the reduction of the thermal load for cooling, on the reduction of the effects caused by radiation with the shading on the eaves, and the reduction of the transmittance on the surfaces that were modified in the study. In terms of energy consumption and economic feasibility, the ECMs reach an annual energy saving percentage of 74% for the building chosen as the case study, and the solutions adopted provide the return of the financial investment, proving suitable for energy saving and economically viable for regions with similar climatic characteristics.

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Fig. 1

Roof and wall configurations

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Fig. 2

Brazilian solar Atlas—annual average of the daily total global radiation incident on the horizontal plane and Brazilian Legal Amazon Region

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Fig. 3

The base case building

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Fig. 4

Incident solar irradiation in the surfaces

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Fig. 5

Energy needs for cooling: monthly latent and sensible loads

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Fig. 6

Surface outside temperature and global irradiance on 11/23

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Fig. 7

Total electricity demand of the base case

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Fig. 8

Surface temperature and indoor operating temperature with ECMs

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Fig. 9

Shadows on the building on 06/21

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Fig. 10

Incident solar irradiation on to the north facade

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Fig. 11

The total cooling loads

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Fig. 12

Electrical demand in cooling

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Fig. 13

Electricity consumption in cooling

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Fig. 14

Monthly balance between generation and consumption

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Fig. 15

Comparison of dates measured and simulated data for DDY

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Fig. 16

Monthly active electrical energy produced by PV system

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Fig. 18

Simulation for the nine capitals of the Brazilian Amazon Region

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Fig. 17

Net present value balance over the years




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