scholarly journals Data Processing Method of Well Testing

2021 ◽  
Vol 134 (3) ◽  
pp. 55-59
Author(s):  
V. V. Dmitruk ◽  
◽  
A.A. Kasyanenko ◽  
E.B. Kovinchenko ◽  
I.V. Kravchenko ◽  
...  
Keyword(s):  
Natural Gas ◽  
Oil And Gas ◽  
Cooling System ◽  
Research Work ◽  
Climatic Conditions ◽  
Gas Condensate ◽  
Air Cooling ◽  
Well Testing ◽  
Technological Processes ◽  
Compressed Gas

This publication discusses research work to improve the existing process for cooling compressed gas at the Yuzhno-Russkoye oil and gas condensate field of OJSC «Severneftegazprom». This project consisted in a scientific study of technological processes for the treatment, compression and transportation of natural gas. Based on the results of the research project, a system for additional cooling of compressed gas after the gas pumping units of the booster compressor station was developed (independent of the ambient temperature). When implementing into the existing technological process of cooling the compressed gas, the developed system will provide the required temperature parameters of the natural gas together with the operated air cooling units of gas and recuperative heat exchangers. To select an additional gas cooling system providing the required cooling capacity, taking into account existing energy resources (electricity, natural gas) and climatic conditions of the Yuzhno-Russkoe oil and gas condensate field, a detailed modeling of the different options of cooling systems of gas actually available on the market of this equipment in Russia and the option selection with the highest rates of integral effect and performance index. The proposed solution guarantees a stable supply of commercial natural gas within the framework of contractual obligations and excludes the influence of temperature factors of the environment on technological processes.

scholarly journals Gas turbine unite inlet air cooling by using an excessive refrigeration capacity of absorption-ejector chiller in booster air cooler

2018 ◽  
Vol 70 ◽  
pp. 03012 ◽  
Author(s):  
Roman Radchenko ◽  
Andrii Radchenko ◽  
Serhiy Serbin ◽  
Serhiy Kantor ◽  
Bohdan Portnoi
Keyword(s):  
Gas Turbine ◽  
Cooling System ◽  
Ambient Air ◽  
Cooling Capacity ◽  
Climatic Conditions ◽  
Air Cooling ◽  
Two Stage ◽  
Air Cooler ◽  
Refrigeration Capacity ◽  
Heat Loads

Two-stage Gas turbine unite (GTU) inlet air cooling by absorption lithium-bromide chiller (ACh) to the temperature 15 °C and by refrigerant ejector chiller (ECh) to 10 °C through utilizing the turbine exhaust gas heat for changeable ambient air temperatures and corresponding heat loads on the air coolers for the south Ukraine climatic conditions is analysed. An excessive refrigeration capacity of combined absorption-ejector chiller (AECh) exceeding the current heat loads and generated at decreased heat loads on the air coolers at the inlet of GTU can be used for covering increased heat loads to reduce the refrigeration capacity of AECh. The GTU inlet air cooling system with an ambient air precooling booster stage and a base two-stage cooling air to the temperature 10 °C by AECh is proposed. The AECh excessive cooling capacity generated during decreased heat loads on the GTU inlet air coolers is conserved in the thermal accumulator and used for GTU inlet air precooling in a booster stage of air cooler during increased heat loads. There is AECh cooling capacity reduction by 50% due to the use of a booster stage for precooling GTU inlet ambient air at the expense of an excessive cooling capacity accumulated in the thermal storage.

Optimal Vacuum Calculation and Analysis of Composite-Cycle Air-Cooling System

2013 ◽  
Vol 718-720 ◽  
pp. 1687-1690 ◽  
Author(s):  
Sheng Long Wang ◽  
Wen Hao Li ◽  
Yin Hai Ge
Keyword(s):  
Cooling System ◽  
Calculation Model ◽  
Climatic Conditions ◽  
System Structure ◽  
Air Cooling ◽  
Air Cooling System ◽  
Working Principle ◽  
Annual Earnings ◽  
Correct Understanding ◽  
The Impact

In this paper, the research object is composite-cycle air-cooling system. First,gave a brief introduction of the system structure and the working principle in power plant. Then the optimal vacuum calculation model was established with the analysis of performance indicators and the amount of equipment production, consumption power of system. Analyze the impact of the ambient temperature to system optimal vacuum in variable conditions. Lastly, combining the climatic conditions of example, which can be drawn is that when the annual best vacuum is 4.8kPa, the running annual earnings is the highest. This article provides guiding significance for correct understanding and engineering applications of composite-cycle air-cooling systems, also further confirm the feasibility of composite-cycle air-cooling system.

scholarly journals ВИБІР ТЕПЛОВОГО НАВАНТАЖЕННЯ АПАРАТІВ ОХОЛОДЖЕННЯ ПОВІТРЯ НА ВХОДІ ГТУ В РІЗНИХ КЛІМАТИЧНИХ УМОВАХ

2018 ◽  
pp. 49-52
Author(s):  
Богдан Сергійович Портной
Keyword(s):  
Fuel Consumption ◽  
Thermal Load ◽  
Cooling System ◽  
Lithium Bromide ◽  
Climatic Conditions ◽  
Specific Fuel Consumption ◽  
Air Cooling ◽  
Air Cooling System ◽  
Refrigeration Capacity ◽  
Annual Reduction

It is proposed the definition of the installed (rational) refrigeration capacity of a waste heat-recovery absorption-ejector chiller that utilizes the heat of the exhaust gases of a gas turbine unite to cool the air at the inlet. Since the effect of air cooling, in particular in the form of a reduction in the specific fuel consumption, depends on its depth (the magnitude of the decrease in air temperature) and duration, it is proposed to determine it by the annual fuel economy. As an example of air cooling at the inlet of a gas turbine unit, the value of reducing specific fuel consumption due to cooling the air at the inlet to the temperature of 15 °C by an absorption lithium-bromide chiller and two-stage air cooling: to a temperature of 15 °C in an absorption lithium-bromide chiller and down to 10 °C – in a refrigerant ejector chiller as the stages of a two-stage absorption-ejector chiller, depending on the installed (design) refrigeration capacity is analyzed.It is shown that proceeding from the different rate of increment of the annual reduction in the specific fuel consumption due to the change in the thermal load in accordance with the current climatic conditions, it is necessary to choose such design heat load for the air cooling system (installed refrigeration capacity of the chillers), which ensures the achievement of the maximum or close to annual reduction in the specific fuel consumption at relatively high rates of its increment. In order to determine the installed refrigeration capacity, which ensures the maximum annual refrigeration capacity (annual production of cold), the dependence of the increment of annual fuel economy from the installed refrigeration capacity is analyzed. Based on the results of the investigation, it was proposed to determine the rational thermal load of the air cooling system (installed - the design refrigeration capacity of the chiller) in accordance with the changing climatic conditions of operation during the year, which provides a maximum annual reduction in the specific fuel consumption at relatively high rates of its increment

scholarly journals Innovative Turbine Intake Air Cooling Systems and Their Rational Designing

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6201
Author(s):  
Andrii Radchenko ◽  
Eugeniy Trushliakov ◽  
Krzysztof Kosowski ◽  
Dariusz Mikielewicz ◽  
Mykola Radchenko
Keyword(s):  
Gas Turbines ◽  
Maximum Rate ◽  
Cooling System ◽  
Ambient Air ◽  
Cooling Capacity ◽  
Climatic Conditions ◽  
Air Cooling ◽  
Thermal Loads ◽  
Cooling Systems ◽  
Air Cooling System

The efficiency of cooling ambient air at the inlet of gas turbines in temperate climatic conditions was analyzed and reserves for its enhancing through deep cooling were revealed. A method of logical analysis of the actual operation efficiency of turbine intake air cooling systems in real varying environment, supplemented by the simplest numerical simulation was used to synthesize new solutions. As a result, a novel trend in engine intake air cooling to 7 or 10 °C in temperate climatic conditions by two-stage cooling in chillers of combined type, providing an annual fuel saving of practically 50%, surpasses its value gained due to traditional air cooling to about 15 °C in absorption lithium-bromide chiller of a simple cycle, and is proposed. On analyzing the actual efficiency of turbine intake air cooling system, the current changes in thermal loads on the system in response to varying ambient air parameters were taken into account and annual fuel reduction was considered to be a primary criterion, as an example. The improved methodology of the engine intake air cooling system designing based on the annual effect due to cooling was developed. It involves determining the optimal value of cooling capacity, providing the minimum system sizes at maximum rate of annual effect increment, and its rational value, providing a close to maximum annual effect without system oversizing at the second maximum rate of annual effect increment within the range beyond the first maximum rate. The rational value of design cooling capacity provides practically the maximum annual fuel saving but with the sizes of cooling systems reduced by 15 to 20% due to the correspondingly reduced design cooling capacity of the systems as compared with their values defined by traditional designing focused to cover current peaked short-term thermal loads. The optimal value of cooling capacity providing the minimum sizes of cooling system is very reasonable for applying the energy saving technologies, for instance, based on the thermal storage with accumulating excessive (not consumed) cooling capacities at lowered current thermal loads to cover the peak loads. The application of developed methodology enables revealing the thermal potential for enhancing the efficiency of any combustion engine (gas turbines and engines, internal combustion engines, etc.).

Theoretical Study and Mathematical Modeling of Plate-Pin Fin Heat Exchanger for Solar Photovoltaic Cooling System

2014 ◽  
Vol 984-985 ◽  
pp. 1138-1146
Author(s):  
R. Vijaykumar ◽  
T. Mukesh ◽  
R. Rudramoorthy
Keyword(s):  
Heat Exchanger ◽  
Cooling System ◽  
Production Capacity ◽  
Climatic Conditions ◽  
Air Cooling ◽  
Solar Photovoltaic ◽  
Water Cooling ◽  
Solar Pv ◽  
Pv System ◽  
Pin Fin

Solar photovoltaic (PV) plays a major role in the renewable energy sector in the field of power production. Production of electricity from solar PV is gaining rapid importance due to its cleaner energy production capacity and it’s adaptability to various climatic conditions. PV cells suffer noticeable drop in efficiency as their operating temperature increases beyond a certain limit. In such cases cooling of the PV cells becomes mandatory. Since the efficiencies of PV cells are in the lower range (a maximum of 18%), a highly effective, inexpensive cooling system is necessary to be employed. Air cooling provides a solution to this cause and is meant to be an better counterpart to water cooling since it overcomes the problems of water cooling such as silt formation, evaporation, soiling and reflection losses. This paper presents a simple mathematical PV/T model to design the cooling system using plate-pin fin extended surface heat exchanger model. A relationship between the heat dissipated and the number of fins along with its dependence on individual fin area is also developed. This model will provide the researchers to design their cooling system according to their PV system geometry.

CFD Analysis of Natural Gas Cooling System Through a Conventional Aircooler Improved by a Fogging System

2018 ◽  
Author(s):  
Jhon Pérez ◽  
Miguel Asuaje Tovar
Keyword(s):  
Relative Humidity ◽  
Natural Gas ◽  
Cooling System ◽  
Operating Conditions ◽  
Inlet Temperature ◽  
Air Cooling ◽  
Outlet Temperature ◽  
Water Droplets ◽  
Gas Industry ◽  
Computational Fluid Dynamics Analysis

Nowadays, under unstable prices scenarios, the oil and gas industry is looking for improvement in its production processes, either by increasing the production and/or lowering the operational costs. Aircoolers, particularly, are key equipments in the natural gas industry, and are frequently the bottleneck of gas conditioning processes. To improve air cooling efficiency and increase their gas volume capacity, several solutions are commonly implemented such as: fan blade angle change, air inlet section modification, fogging cooling system, among others. The present study shows the CFD (Computational Fluid Dynamics) analysis of an air cooler, under an air flow with an evaporative cooling system, in order to quantify the effect of this cooling process on its overall equipment performance. Simulations were carried out using sing the ANSYS CFX v-14® software, in a simplified multidomain which consider fluid and solid blocks: 1.- External two-phase flow (air + water droplets) with heat and mass transfer 2.- Heat transfer through the pipe wall 3.- Single phase natural gas flow inside the tubes In order to stablish an operational range of the fogging system, the influence of parameters like: inlet temperature and relative humidity of the air, water flow rate, water droplets mean diameter, water injection position, were studied [9, 10]. The results show a good agreement (around 5%) respect to the reported values on the literature. The best performance for the equipment was reported with a droplet diameter of 20 μm and for low relative humidity (less than 65%), which guarantees the complete evaporation of the droplets within the studied domain. For the analyzed operating conditions, a reduction of the gas outlet temperature of up to 1.5°C can be achieved.

scholarly journals Using meteorological data to determine the risk of heat stress

2012 ◽  
Vol 52 (No. 2) ◽  
pp. 39-47
Author(s):  
V. Šleger ◽  
P. Neuberger
Keyword(s):  
Air Temperature ◽  
Cooling System ◽  
Meteorological Data ◽  
Climatic Conditions ◽  
Egg Laying ◽  
Air Cooling ◽  
Computation Technique ◽  
Stable Housing ◽  
Air Cooling System ◽  
Evaporation Cooling

This paper first proposes a technique of computing air temperature and humidity in stables based on outdoor air parameters and biological production of animals. The computation technique is outlined. The calculated values are then used to assess the potential of evaporation cooling in mild climatic conditions. Graphs illustrate the assumed effect of evaporation cooling equipment inside a stable housing of egg laying hens. Used in the computation were hourly meteorological readings obtained during the period May to August in years 2000 to 2002, in the locality with a potential installation of a cooling system. Other Graphs illustrate the time the animals spent in an environment with a particular air temperature. For instance in June 2002, the time animals in the stable were exposed to temperatures 27°C or higher was reduced by using an air cooling system from 39 h to 22 h, and in July 2002 from 33 h to 4 h. The envisaged model can be modified for other kinds of gallinaceous poultry and pigs.

scholarly journals DESEMPENHO DE UM SISTEMA DE RESFRIAMENTO EVAPORATIVO DO AR EM CASA-DE-VEGETAÇÃO

Irriga ◽  
2010 ◽  
Vol 15 (2) ◽  
pp. 140-150
Author(s):  
Antonio José Steidle Neto ◽  
SÉRGIO ZOLNIER
Keyword(s):  
Vapor Pressure ◽  
Air Temperature ◽  
Vapor Pressure Deficit ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Climatic Conditions ◽  
Air Cooling ◽  
Cooling Efficiency ◽  
Growing Period ◽  
Air Cooling System

Este trabalho foi conduzido com o objetivo de analisar o desempenho de um sistema de resfriamento evaporativo do ar (tipo painel-exaustor) em casa-de-vegetação, ao longo do período diurno em dias com condições climáticas distintas. Foram realizadas medições de temperatura e umidade relativa do ar no interior e exterior de uma casa-de-vegetação durante o período de crescimento e desenvolvimento de tomateiros cultivados em substrato de areia. Verificou-se que as eficiências médias diárias de resfriamento evaporativo do ar variaram entre 74% e 81%. Os decréscimos máximos na temperatura do ar, imediatamente após a sua passagem pelo painel de celulose, foram de 8,2ºC e 11,4ºC. Observou-se ainda que, a eficiência de resfriamento do ar foi sensivelmente melhorada quando o déficit de pressão de vapor d'água do ar externo foi superior a 1,8 kPa.   UNITERMOS: déficit de pressão de vapor d'água do ar, temperatura do ar, eficiência de resfriamento evaporativo.     STEIDLE NETO, A. J.; ZOLNIER, S. EVAPORATIVE AIR COOLING SYSTEM PERFORMANCE IN A GREENHOUSE     2 ABSTRACT   This work aimed to analyze the performance of an evaporative air cooling system (pad-fan type) in greenhouse along daytime period in days with different climatic conditions. Air temperature and relative humidity measurements inside and outside of an greenhouse were made during the growing period of tomato plants cultivated in sand substrate. It was verified that the average daily evaporative cooling efficiency ranged from 74% to 81%. The maximum air temperature decrements, immediately after its passage through the cellulose pad, were 8.2°C and 11.4°C. It was also observed that the air cooling efficiency was sensitively improved when the vapor pressure deficit of the external air was higher than 1.8 kPa.   KEYWORDS: vapor pressure deficit, air temperature, evaporative cooling efficiency.  

scholarly journals ОХОЛОДЖЕННЯ ПОВІТРЯ НА ВХОДІ ГОЛОВНОГО СУДНОВОГО ДВИГУНА АБСОРБЦІЙНОЮ БРОМИСТОЛІТІЄВОЮ ХОЛОДИЛЬНОЮ МАШИНОЮ В ТРОПІЧНИХ УМОВАХ

2020 ◽  
pp. 18-23
Author(s):  
Роман Миколайович Радченко ◽  
Дмитро Вікторович Коновалов ◽  
Максим Андрійович Пирисунько ◽  
Чжан Цян ◽  
Луо Зевей
Keyword(s):  
Air Temperature ◽  
High Efficiency ◽  
Waste Heat ◽  
Cooling System ◽  
Ambient Air ◽  
Climatic Conditions ◽  
Air Cooling ◽  
Exhaust Gas ◽  
Low Speed ◽  
Speed Engine

The efficiency of air cooling at the inlet of the main low speed engine of a transport vessel during operation in tropical climatic conditions on the Shanghai-Karachi-Shanghai route was analyzed. The peculiarity of the tropical climate is the high relative humidity of the air at the same time its high temperatures, and hence the increased thermal load on the cooling system, which requires efficient transformation of the waste heat into the cold in the case of the use of waste heat recovery refrigeration machines. The cooling of the air at the inlet of the low speed engine by absorption lithium bromide chillers, which are characterized by high efficiency of transformation of waste heat into cold – by high coefficients of performance, is investigated. A schematic-construction solution of the air cooling system at the inlet of the ship's main engine using the heat of exhaust gases by an absorption chiller is proposed and analyzed. With this the cooling potential of the inlet air cooling from the current ambient air temperature to 15 ° C and the corresponding heat consumption for the operation of the adsorption chiller, on the one hand, was compared with the available exhaust gas heat potential, on the other hand. The effect of using the exhaust gas heat to cool the air at the inlet of the engine has been analyzed taking into account the changing climatic conditions during the voyage. Enhancement of fuel efficiency of the ship's engine by reducing the inlet air temperature were evaluated by current values of the reduction in specific and total fuel consumption. It is shown that due to the high efficiency of heat conversion in absorption chillers (high coefficients of performance 0.7…0.8), a significant amount of excessive exhaust gas heat over the heat required to cool the ambient air at the inlet of the engine to 15 ° C, which reaches almost half of the available exhaust gas heat during the Shanghai-Karachi-Shanghai route. This reveals the possibility of additional cooling a scavenge air too with almost double fuel economy due to the cooling of all cycle air of the low speed engine, including the air at the inlet.

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