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Non-Destructive Current Sensing for Energy Efficiency Monitoring in Buildings with Environmental Certification.

Mota LT, Mota Ade A, Coiado LC - Sensors (Basel) (2015)

Bottom Line: A prototype of the proposed sensor was developed and tests were performed to validate this sensor.Based on laboratory tests, it was possible to characterize the proposed current sensor with respect to the number of turns and cross-sectional area of the primary and secondary coils.Furthermore, using the Least Squares Method, it was possible to determine the efficiency of the air core transformer current sensor (the best efficiency found, considering different test conditions, was 2%), which leads to a linear output response.

View Article: PubMed Central - PubMed

Affiliation: Pontifical Catholic University of Campinas, CEATEC, Campus I, Rod. Dom Pedro I, Km136, CEP 13086-900, Campinas, São Paulo, Brazil. lia.mota@puc-campinas.edu.br.

ABSTRACT
Nowadays, buildings environmental certifications encourage the implementation of initiatives aiming to increase energy efficiency in buildings. In these certification systems, increased energy efficiency arising from such initiatives must be demonstrated. Thus, a challenge to be faced is how to check the increase in energy efficiency related to each of the employed initiatives without a considerable building retrofit. In this context, this work presents a non-destructive method for electric current sensing to assess implemented initiatives to increase energy efficiency in buildings with environmental certification. This method proposes the use of a sensor that can be installed directly in the low voltage electrical circuit conductors that are powering the initiative under evaluation, without the need for reforms that result in significant costs, repair, and maintenance. The proposed sensor consists of three elements: an air-core transformer current sensor, an amplifying/filtering stage, and a microprocessor. A prototype of the proposed sensor was developed and tests were performed to validate this sensor. Based on laboratory tests, it was possible to characterize the proposed current sensor with respect to the number of turns and cross-sectional area of the primary and secondary coils. Furthermore, using the Least Squares Method, it was possible to determine the efficiency of the air core transformer current sensor (the best efficiency found, considering different test conditions, was 2%), which leads to a linear output response.

No MeSH data available.


Concentric solenoids.
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sensors-15-16740-f002: Concentric solenoids.

Mentions: In this work, the primary and the secondary coils have the same radius (R1 = R2), the same length (Lg1 = Lg2) and the same number of turns (N1 = N2), as illustrated in Figure 2.It is important to emphasize that the primary number of turns is equal to the secondary number of turns, and in this work, this number varies according to the test performed (5, 10, and 15 turns).


Non-Destructive Current Sensing for Energy Efficiency Monitoring in Buildings with Environmental Certification.

Mota LT, Mota Ade A, Coiado LC - Sensors (Basel) (2015)

Concentric solenoids.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541904&req=5

sensors-15-16740-f002: Concentric solenoids.
Mentions: In this work, the primary and the secondary coils have the same radius (R1 = R2), the same length (Lg1 = Lg2) and the same number of turns (N1 = N2), as illustrated in Figure 2.It is important to emphasize that the primary number of turns is equal to the secondary number of turns, and in this work, this number varies according to the test performed (5, 10, and 15 turns).

Bottom Line: A prototype of the proposed sensor was developed and tests were performed to validate this sensor.Based on laboratory tests, it was possible to characterize the proposed current sensor with respect to the number of turns and cross-sectional area of the primary and secondary coils.Furthermore, using the Least Squares Method, it was possible to determine the efficiency of the air core transformer current sensor (the best efficiency found, considering different test conditions, was 2%), which leads to a linear output response.

View Article: PubMed Central - PubMed

Affiliation: Pontifical Catholic University of Campinas, CEATEC, Campus I, Rod. Dom Pedro I, Km136, CEP 13086-900, Campinas, São Paulo, Brazil. lia.mota@puc-campinas.edu.br.

ABSTRACT
Nowadays, buildings environmental certifications encourage the implementation of initiatives aiming to increase energy efficiency in buildings. In these certification systems, increased energy efficiency arising from such initiatives must be demonstrated. Thus, a challenge to be faced is how to check the increase in energy efficiency related to each of the employed initiatives without a considerable building retrofit. In this context, this work presents a non-destructive method for electric current sensing to assess implemented initiatives to increase energy efficiency in buildings with environmental certification. This method proposes the use of a sensor that can be installed directly in the low voltage electrical circuit conductors that are powering the initiative under evaluation, without the need for reforms that result in significant costs, repair, and maintenance. The proposed sensor consists of three elements: an air-core transformer current sensor, an amplifying/filtering stage, and a microprocessor. A prototype of the proposed sensor was developed and tests were performed to validate this sensor. Based on laboratory tests, it was possible to characterize the proposed current sensor with respect to the number of turns and cross-sectional area of the primary and secondary coils. Furthermore, using the Least Squares Method, it was possible to determine the efficiency of the air core transformer current sensor (the best efficiency found, considering different test conditions, was 2%), which leads to a linear output response.

No MeSH data available.