It is noted that for the efficiency enhancement of solar energy converters it becomes necessary to measure exactly the temperature and temperature difference. The requirements of normative documents exceed the metrological parameters of the standardized temperature sensors. Therefore, the challenge of thermometers and temperature difference meters accuracies can be solved by errors correction within simple and practically suitable procedure.
The expediency of the implementation of precision thermometers based on platinum resistance thermoconverters and multi-valued specialized integrated schemes are shown. The structure of the precise digital thermometer is developed. The features of its realization are shown, depending on the sensor. Basing on analyzing the digital thermometer errors, the method for its adjustment is considered. It consists in correcting their additive and multiplicative error components.
It is emphasized on the complexity of the implementation of accurate digital temperature difference meters because of the need to ensure the invariance to the effects of four-wire connecting lines and measuring currents after significantly reducing their sensitivity threshold. The structure and errors correction method of precision temperature difference meters with time-varying signals from two sensors and determination of the measurement result in digital form are proposed. It becomes possible to unify the scheme design of precision thermometers as well as sensitive temperature difference meters.
To ensure the effectiveness of measurements in dispersed information-measuring devices of solar energy converters, it is also proposed to develop the structures of intellectual thermometers and temperature difference meters for purposes of IoT or information-measuring channels of cyber-physical systems.
[1] D. Placko. Metrology in Industry. The Key for Quality. John Wiley & Sons Inc., 2013.
[2] P. Ornatskiy. Theoretical basis of information and measurement technology. Kyiv, Ukraine: Vyscha shkola. 1983. (In Russian).
[3] ISO 10012:2003. Measurement management system. Requirements for measurement processes and measuring equipment. 2003.
[4] Data Acquisition Handbook, A Reference for DAQ and Analog & Digital Signal Conditioning. Measurement Computing Corporation, 2012.
[5] Cyber-Physical Systems: Metrological Issues. S. Yatsyshyn, B. Stadnyk, (Eds). IFSA Publishing, Barcelona, 2016.
[6] Yu. Yatsuk, M. Mykyjchuk, V. Zdeb, R. Yanovych, “Metrological Array of Cyber-Physical Systems. Part 11. Remote Error Correction of Measuring Channel”, Sensors & Transducers, vol. 192, iss. 9, p. 22–29, 2015.
[7] Directive 2012/27/EU of the European Parliament and of the Council of 25 Oct.2012 on energy efficiency, amending Directives 2009/125/EC and 2010/30/EU and repealing Directives 2004/8/EC and 2006/32/EC Text with EEA relevance OJ L 315, 14.11.2012, p. 1–56: available: https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32012L0027...
[8] EU Energy Efficiency Directive (2012/27/EU) Guidebook for Strong Implementation. [On-line]. Available: http://eedguidebook.energycoalition.eu/images/PDF/EED.pdf
[9] Energy Efficiency Directive deal: First stepping stone for attractive Energy Union, 2018. [On-line]. Available: http://energycoalition.eu/eed-deal.
[10] C. Canevari, Art. 8 of Energy Efficiency Directive on Energy Audits, Energy Workshop Energy Community, Vienna, 23 Nov. 2017. [On-line]. Available: www.cepi.eu/index.php? mact=Profile,cntnt01
[11] Energy Perspectives 2018, Long-term macro and market outlook. [On-line]. Available: https://www.equinor. com/content/dam/statoil/documents/energy-perspectives/energy-perspectives-2018.pdf
[12] K. Sreekanth, Energy Policy: Perspectives, Challenges and Future Directions, Kuwait: Nova Science Publisher, 2018.
[13] E. Worrell, L. Bernstein, J. Roy, L. Price, J. Harnisch, “Industrial energy efficiency and climate change mitigation”, Energy Efficiency, vol. 2, p.109–123, 2009.
[14] E. Cagno, A. Trianni, G. Spallina et al. Energy Efficiency, vol.10, p.855, 2017. [On-line]. Available: https://doi.org/10.1007/s12053-016-9488-x
[15] G. Dyakova G. et al, “Priority directions of the improvement of energy management at the enterprise”, IOP Conf. Ser.: Earth Environ. Sci., 90 012218, 2017.
[16] T. Sudhakar, P. Anjaneya, R. Prahlada, “Analysis of Process Parameters to Improve Power Plant Efficiency”, IOSR Journal of Mechanical and Civil Engineering, vol. 14, iss. 1, ver. II, p. 57–64, 2017.
[17] By 2020, 11 % of energy in Ukraine will be produced from renewable sources. 2014. [On-line]. Available: http://ecotown.com.ua/news/Do-2020-roku-v-Ukrayini-11-enerhiyi-vyroblyat...
[18] P. Stolyarchuk, M. Mykyychuk, V. Yatsuk, M. Mikhaleva, O. Shpack, T. Oleskiv, “Development of a mathematical model of efficiency solar converters”, East-Europ. Journ. Adv. Techn, no. 5/8(71), p. 30–36, 2014.
[19] Order of Ministry of Housing and Communal Services of Ukraine, 27.06.2008, no.190. On approval of the Rules for the use of centralized municipal water supply and sewage systems in settlements of Ukraine. [On-line]. Available: https://zakon.rada.gov.ua/laws/show/z0936-08.
[20] T. Oleskiv, V. Yatsuk, “Metrological support of temperature difference meters on the basis of platinum thermocouples with two-wire communication line”, Measuring equipment and metrology, no.74, p.25-28, 2013.
[21] Kh. Vasylykha, Yu. Yatsuk, V. Zdeb, V. Yatsuk, “Experimental studies of temperature channel efficiency for solarenergy systems”, East.-Europ. Journ. Enterprise Techn., no. 3/8 (87), p. 10–16, 2017.
[22] Kh. Vasylykha. Improvement of the normative and technical basis of tests of solar transducers. Autoref. PhD dys., Lviv Polytech. Nat. Univ, 2017.
[23] V. Vasylyuk, “Principles of construction of high-precision temperature sensors based on pn-junction”, Measuring equipment and metrology. no. 53, p. 70–76, 1998.
[24] O. Kanoun. „Kalibrationsfreie Temperaturmessung durch Parameterextraktion aus der Strom-Spannungskennlinie von pn-Übergängen“, Technisches Messen, vol.68, no.9, p.442-448, 2003.
[25] S. Vivek, J. Chen, AN60590 - PSoC® 3, PSoC 4, and PSoC 5LP - Temperature Measurement with a Diode. Last Updated: Sep 16, 2018, [On-line]. Available: https://www.cypress. com/documentation/application-notes/an60590-psoc-3-psoc-4-and-psoc-5lp-temperature-measurement-diode.
[26] Yu. Shwarts et al. “Limiting characteristics of diode temperature sensors”, Sensors and actuators, vol.86, p.197-205, 2000.
[27] AD7792/AD7793, 3-Channel, Low Noise, Low Power, 16-/24-Bit ∑-Δ ADC with On-Chip In-Amp and Reference, Analog device. [On-line]. Available: http://www.acdcshop.gr/ content/AD7793BRUZ.pdf
[28] Thermostat liquid TCP-0105HO-100. Instruction on operation. JLE “Termomir”. [On-line]. Available: http://thermomir.com.ua/images/files/nast/tsr-0105no-100.pdf.
[29] Ohmmeter digital reference OC – 0103. JLE “Termomir”. [On-line]. Available: https://thermomir.com/p16543680-ommetr-tsifrovij-etalonnij.html.
[30] CY8CKIT-059 PSoC® 5LP Prototyping Kit with Onboard Programmer and Debugger, Last Updated: Apr 02, 2018. [On-line]. Available: http://www.cypress.com/ documentation/development-kitsboards/cy8ckit-059-psoc-5lp-prototyping-kit-onboard-programmer-and