izmertechИзмерительная техникаIzmeritel`naya Tekhnika0368-10252949-5237ФГУП "ВНИИФТРИ"10.32446/0368-1025it.2026-1-22-34izmertech-2454Research ArticleОБЩИЕ ВОПРОСЫ МЕТРОЛОГИИ И ИЗМЕРИТЕЛЬНОЙ ТЕХНИКИGENERAL PROBLEMS OF METROLOGY AND MEASUREMENT TECHNIQUESТермодинамические свойства 3,3,3-трифторпропена (R1243zf): уравнение состояния и стандартные справочные данныеThermodynamic properties of 3,3,3-trifluoropropene (R1243zf): equation of state and standard reference datahttps://orcid.org/0000-0003-0428-9625РыковС. В.RykovS. V.

Сергей Владимирович Рыков, канд. техн. наук, доцент кафедры «Прикладная математика и информатика»

191186, СанктПетербург, ул. Большая Морская, д. 18

Sergey V. Rykov, Cand. Sc. (Engineering), Associate Professor of Department of Applied Mathematics and Computer Science

191186, Saint Petersburg, Bolshaya Morskaya st., 18

togg1@yandex.ruhttps://orcid.org/0000-0001-8435-4356ПоповП. В.PopovP. V.

Петр Васильевич Попов, канд. техн. наук, старший научный сотрудник, начальник сектора

119361, Москва, ул. Озерная, д. 46

Peter V. Popov, Cand. Sc. (Engineering), Senior Research Fellow, Head of sector

191186, Saint Petersburg, Bolshaya Morskaya st., 18

PetrVP@rostest.ruhttps://orcid.org/0000-0002-7718-9660КудрявцеваИ. В.KudryavtsevaI. V.

Ирина Владимировна Кудрявцева, канд. техн. наук, доцент Института математики

197101, СанктПетербург, Кронверкский пр-т, д. 49

Irina V. Kudryavtseva, Cand. Sc. (Engineering), Associate Professor of Institute of Mathematics

191186, Saint Petersburg, Bolshaya Morskaya st., 18

neva0175@mail.ruhttps://orcid.org/0000-0003-4694-6590РыковВ. А.RykovV. A.

Владимир Алексеевич Рыков, д-р техн. наук, профессор, доцент, Институт математики

197101, Санкт-Петербург, Кронверкский проспект, д. 49

Vladimir A. Rykov, D. Sc. (Engineering), Professor, Associate Professor, Institute of Mathematics

191186, Saint Petersburg, Bolshaya Morskaya st., 18

rykov-vladimir@rambler.ruСанкт-Петербургский государственный университет промышленных технологий и дизайнаРоссияSaint Petersburg State University of Industrial Technologies and DesignRussian FederationНаучно-исследовательский центр прикладной метрологии – РостестРоссияResearch Center for Applied Metrology – RostestRussian FederationНациональный исследовательский университет ИТМОРоссияUniversity ITMORussian Federation2026140320267512234Copyright © ФГУП "ВНИИФТРИ", 20262026ФГУП "ВНИИФТРИ"ФГУП "ВНИИФТРИ"https://www.izmt.ru/jour/about/submissions#copyrightNoticehttps://www.izmt.ru/jour/article/view/2454

Обсуждены перспективы использования 3,3,3-трифторпропена (R1243zf) – нового холодильного агента с нулевым озоноразрушающим потенциалом и очень низким (0,29) потенциалом глобального потепления. В последние годы получена надёжная экспериментальная информация о термодинамических свойствах (плотности, давлении, изохорной теплоёмкости и скорости звука) R1243zf как в однофазной области, так и на линии насыщения «жидкость – пар». С применением указанных термодинамических величин в широкой области параметров состояния различными специалистами разработан ряд уравнений состояния хладагента R1243zf. В настоящем исследовании предложено единое фундаментальное уравнение состояния R1243zf, созданное в рамках масштабной теории критических явлений и соотношения подобия. Использование этого уравнения позволяет получить надёжные данные о равновесных свойствах жидкости и газа не только в регулярной части термодинамической поверхности, но и в асимптотической окрестности критической точки. Единое фундаментальное уравнение состояния применено для расчёта стандартных справочных данных, включающих информацию о плотности, давлении, энтальпии, энтропии, скорости звука, изобарной и изохорной теплоёмкости 3,3,3-трифторпропен в области параметров состояния 169–420 К и до 40 МПа. Для оценки неопределённости стандартных справочных данных использованы две методики, основанные на расчёте различных статистических характеристик. Получены расширенные неопределённости следующих равновесных свойств R1243zf: плотности (0,25 %); давления (0,35 %); удельной теплоёмкости (1,2 %); скорости звука (0,37 %); плотности насыщенных пара и жидкости (0,55 и 0,40 % соответственно). Рассчитанные оценки статистических характеристик свидетельствуют о том, что единое фундаментальное уравнение состояния хладагента R1243zf адекватно передаёт его равновесные свойства в указанном выше диапазоне параметров состояния. Результаты исследования полезны при проектировании систем кондиционирования воздуха и холодильной техники.

The article discusses the potential use of 3,3,3-trifluoropropene (R1243zf), a new refrigerant with zero ozone-depleting potential and a very low (0.29) global warming potential. In recent years, reliable experimental information has been obtained on the thermodynamic properties (density, pressure, isochoric heat capacity, and speed of sound) of R1243zf both in the single-phase region and on the liquid-vapor saturation line. Using the values of these thermodynamic quantities obtained over a wide range of state parameters, a series of equations of state for this refrigerant have been developed. In contrast to the known equations of state, a unified fundamental equation of state is proposed in this study. The unified fundamental equation of state for R1243zf is developed within the framework of a large-scale theory of critical phenomena and the similarity relation, which makes it possible to obtain reliable data on the equilibrium properties of liquid and gas not only in the regular part of the thermodynamic surface, but also in the asymptotic neighborhood of the critical point. A unified fundamental equation of state was used to calculate the standard reference data, including information on the density, pressure, enthalpy, entropy, speed of sound, isobaric and isochoric heat capacity of 3,3,3-trifl uoropropene in the range of state parameters of 169–420 K and up to 40 MPa. To estimate the uncertainty of the standard reference data, two methods based on the calculation of various statistical characteristics were used. The expanded uncertainties of the following equilibrium properties of R1243zf were obtained: density (0.25 %); pressure (0.35 %); specific heat capacity (1.2 %); speed of sound (0.37 %); saturated vapor and liquid density (0.55 and 0.40 %, respectively). The calculated estimates of the statistical characteristics indicate that the unified fundamental equation of state adequately conveys the equilibrium properties of the refrigerant R1243zf in the above-mentioned range of state parameters. The results of the study can be used in the design of air conditioning and refrigeration systems.

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The authors declare that there are no conflicts of interest present.