THERMAL-PHYSICAL CHARACTERISTICS OF GALAALTI GEOTHERMAL WATER OF SHABRAN DISTRICT OF AZERBAIJAN AT HIGH PRESSURE AND TEMPERATURES
Creators: name: Mammadova, Esmira
name: Zeynalova, Adila
name: Humay Maharramli
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: geothermal water
density
experimental studies
thermal-physical properties
energy

description: The article presents the experimental data obtained using high-precision experimental devices on the density of the Gala-alti geothermal water of the Shabran region of Azerbaijan at high pressure and temperature. Geothermal energy is a part of alternative energy and is widely used for various purposes all over the world. In recent years, due to the increase in the cost of traditional energy sources and their possible shortage in the future, technologies using thermal waters are being actively developed. In order to use geothermal waters in various power plants, it is necessary to know their thermophysical properties. Geothermal waters in Azerbaijan were studied in the 20th century [15]. Most of these studies are related to geological analysis and chemical structure analysis of geothermal waters. In order to study the methods of using geothermal waters and obtaining energy from them, it is necessary to study their thermal-physical properties. This article presents experimental data about the "Gala-alti" geothermal water in the Shabran region of Azerbaijan. In order to measure the density of the "Gala-alti" geothermal water of Shabran region at high pressure and temperature, a high-precision experimental device using the vibration-tube densimeter method was used [6]. This method for modern experimental thermal physics is characterized by high measurement accuracy, simplicity, insignificant time and economic costs, as well as the possibility of automation of the measurement process. The working principle of the experimental device is given in [7-9]. The main element of the Anton-Paar DMA HPM vibrating tube densimeter unit is a measuring cell consisting of a Hastelloy C-276 vibrating tube made of nickel-based stainless steel alloys with high corrosion resistance. The measuring element is designed to measure temperature in the range T=263.15-473.15 K and pressure p=0.1-140 MPa. The temperature in the measuring chamber containing the U-shaped tube is maintained using an external thermostat F32-ME (Julabo, Germany) with an error of 0.01 K. Temperature is measured using a platinum resistance thermometer (ITS-90). ) Pt100 (Type 2141) with an error of ±15 mK. The pressure is generated using a HIP pump (No. 37-6-30, USA) and pressure sensors (WIKA Alexander Wiegand GmbH &amp; Co., Germany) using P-10 accuracy class 0.1% and HP-1 accuracy class 0.5% is measured by The signals from the pressure gauges are also transmitted to the computer control system. In these conditions, the error in density measurement was Δρ/ρ = ±(0.01 0.03)%. (p, ρ,T) dependences were measured using isotherms from the minimum possible pressure for a given temperature and then increasing it in increments of about 10 MPa. Researches were carried out in the range T=(274.15 413.15) K and pressures up to p=100 MPa. Densities obtained at atmospheric pressure were compared with those measured on the DSA 5000M. The data obtained by different methods are in good agreement with each other within Δp/ρ = ±0.02%. The obtained results of density of "Gala-alti" geothermal water of Shabran region are shown in Table 1. For the measurement of the thermal physical properties of the Gala-alti geothermal water of the Shabran region of Azerbaijan, the methodologies that allow for very accurate measurements in the liquid phase at high state parameters have been selected and substantiated. An experimental device was assembled and adjusted for measuring density at different temperatures and pressures using the vibrating tube densimeter method. In order to check the working capacity of the experimental unit, the densities of aqueous solutions of water, toluene, methanol, and NaCl as reference substances were studied in a wide range of state parameters. Since the thermal-physical properties of the Gala-alti geothermal water of the Shabran region of Azerbaijan were studied for the first time, it is impossible to compare them with the literature data. The obtained data were compared with the thermal-physical properties of pure water and it was determined that similar anomalies of water in the behavior of the studied properties are known.