The possibilities of assessing HDD and CDD indicators for the territory of Uzbekistan using international meteorological databases

This article is devoted to the study of the possibilities of assessing the indicators of the heating degree-day (HDD) and cooling degree-day (CDD) for the territory of the Republic of Uzbekistan using international meteorological databases such as NASA POWER and ERA5 in order to make adjustments to the energy building codes in force in the country when determining the load for the design of systems heat and cooling supply in buildings and structures.
The authors present the results of studies to determine the dynamics of changes in the heating and cooling degreeday indicators (HDD and CDD) on the territory of the Republic of Uzbekistan over the past 15 years (for the period 2005-2020) on the basis of international databases. It is shown that when using NASA POWER data to calculate HDD values on the territory of Uzbekistan, the error is from 7 to 14%, whereas when using ERA5 data, this number varies between 5-9% at different base temperatures.
It is also shown, that in the case of CDD calculation, it is impractical to use data from both databases, and the use of ground-based observations is recommended to solve this problem. At the same time, in the absence of meteorological stations in a certain region (according to the map of their location on the territory of the country), in the future it is necessary to install additional ones suitable for conducting scientific research, according to the known methodology.
The paper also presents a project of a digital HDD map for the territory of Uzbekistan, which is a scientific and technical product of a strategic nature in terms of building codes and regulations in the republic in order to plan heat and cooling systems for buildings and structures with the least errors.
It is noted, that the inclusion of additions and changes to existing energy building codes and regulations, as well as the proposed HDD map project for the country, being a significant step in the development of energy policy in the republic, will be useful to international investors in the preparation and planning of related projects.

1. [Ehlektronnyi resurs]–Rezhim dostupa: https://news.un.org/ru/story/2022/02/1418822.

2. [Ehlektronnyi resurs]–Rezhim dostupa: https://unfccc.int/event/12th-petersberg-climatedialogue.

3. https://www.dw.com/ru/a-53342964.

4. Uzbekistan ratifitsiroval Parizhskoe soglashenie po klimatu. [Ehlektronnyi resurs].–Rezhim dostupa: https://uzbekistan.un.org/ru/sdgs.

5. KMK 2.01.01-94. Klimaticheskie i fizikogeologicheskie dannye dlya proektirovaniya. Tashkent, 1994 g.

6. KMK 2.01.04-97. Stroitel'naya teplotekhnika, 2011.

7. N. Klevets. Kak izmeneniya klimata vliyayut na stroitel'nuyu otrasl'// Obshchestvenno-politicheskii, nauchno-populyarnyi ehkologicheskii zhurnal «Rodnaya prirodA». 11/2019. Str. 16-18.

8. Popel' O.S., Frid S.E., Kiseleva S.V., Kolomiets YU.G., Lisitskaya N.V. Klimaticheskie dannye dlya vozobnovlyaemoi ehnergetiki Rossii (baza klimaticheskikh dannykh). Uchebnoe posobie. Moskva, 2010.

9. Aloyan R.M., Fedosov S.V., Oparina L.A. Ehnergoehffektivnye zdaniya – sostoyanie, problemy i puti resheniya – Ivanovo: PreSSto, 2016.

10. [Ehlektronnyi resurs]–Rezhim dostupa: https://power.larc.nasa.gov/

11. [Ehlektronnyi resurs]–Rezhim dostupa: https://www.ecmwf.int/en/forecast/datasets/reanalysisdatasets/era5.

12. [Ehlektronnyi resurs]–Rezhim dostupa: https://norge.ewsite.se/meteonorm.com.

13. Ofitsial'nyi sait Tsentra gidrometeorologicheskoi sluzhby Respubliki Uzbekistan. [Ehlektronnyi resurs]. –Rezhim dostupa: https://hydromet.uz/.

14. https://data.meteo.uz/.

15. Ofitsial'nyi sait OOO «Raspisanie pogo-dY». [Ehlektronnyi resurs].–Rezhim dostupa: https://rp5.ru.

16. Ciulla G., Lo Brano V. and Moreci E. Degree Days and Building Energy Demand. SASEC2015, Third Southern African Solar Energy Conference, 11 – 13 May 2015. Kruger National Park, South Africa. rr. 65-70.

17. ASHRAE Guideline 14-2002, Measurement of Energy and Demand Savings, 2002.

18. Murat Kenisarin, Kamola Kenisarina. Energy saving potential in the residential sector of Uzbekistan. // Energy 32 (2007) 1319–1325.