Values Of Mass Flow Research Articles

Risk factors for early intraventricular hemorrhagic complications following lateral ventricular tumor surgery.

The complications anticipated in the postoperative period after surgical resection of lateral ventricular neoplasms (LVN) are hemorrhage, hydrocephalus. At the N.N. Burdenko Neurosurgery Center, 48 patients with LVN underwent surgical resection. We focused on the correlation between approaches to the ventricular system on one hand and the extent of resection and incidence of complications on the other based on anatomical and perfusion characteristics estimated via preoperative magnetic resonance imaging (MRI) with arterial spin labeling perfusion. By eliminating the surgical approach as a potential risk factor, we were able to demonstrate the correlation between the frequency of postoperative hemorrhage, the Evans index value, patient's gender, tumor blood flow (nTBF) and the location of the mass in the anterior horn of the lateral ventricle. The risk of hemorrhage depends on the patient's gender, presence of hydrocephalus, location of the mass and tumor blood flow values. The risk increases along with increase in Evance index and nTBF values.

Image Based In-Process Powder Stream Monitoring during Laser Metal Deposition for the Measurement of the Gravimetric Powder Mass Flow Rate and the Detection of Deviations in the Powder Stream

In laser metal deposition, the quality of the applied clad as well as the additively manufactured component is directly linked to the precise powder feeding into the laser-induced melt pool. Despite the highly automated and closely monitored process, there is currently no industrially established in-process system for the powder stream monitoring. In this work, the powder is illuminated with a line laser in a defined horizontal plane to visualize the back-reflecting light to the camera. Optical filtering is needed to attenuate the process emissions, which is adjusted to the wavelength of the illumination laser. The powder stream is continuously monitored by observing grayscale values. The gravimetric measurements of the powder mass flow are correlated to the grayscale values to display the powder mass flow in absolute mass flow values from the image data. This is qualified by the detection of defined and temporarily introduced deviations in the powder stream.

Results of the testing of an automated control system and the application of natural gas burners

Purpose. Testing an automated control system to improve the accuracy of calculating natural gas costs in coalfields and provide reliable information to suppliers and consumers regarding mutual settlements. Research methods. The conditions of operation of the mine degassing system and the methods of monitoring its operational indicators for effective management of the technical condition of the object in the real conditions of the mine environment are considered. Approaches to continuous monitoring of well parameters using structural modules of the ACS of the DSH have been determined. Findings. The DSH ACS module was implemented in the real conditions of the mine environment, which made it possible to carry out automatic monitoring of the methane-air mixture, measurement and preparation for issuing to the operational personnel the current values of pressure drops on the diaphragms, absolute pressure, temperature and volume flow of gas. Originality. A new method of increasing the accuracy of commercial accounting of natural gas of coal deposits has been developed, which consists in constant monitoring of the technical condition of the degassing system and automated accounting of natural gas based on the «DIYA» measuring complex. The average hourly values of gas mass flow were obtained, as well as the difference between the data of the channel of the operating ASUTP KS and the channel of the "Ergomera"-126.MU controller in the complex with the "DIYA" operator station. Practical implications. A mine experiment was conducted on monitoring and control of mine degassing gas pipelines using innovative technical solutions for the rapid and systematic delivery of information about the parameters of the mine degassing system to the dispatch service. The structure, principle of operation, methodology for calculating the consumption of natural gases and coal field gases were developed, and industrial tests of an experimental sample of the ACS of the DSH were carried out with automatic entry of results into electronic reporting journals.

Results of the testing of an automated control system and the application of natural gas burners

Purpose. Testing an automated control system to improve the accuracy of calculating natural gas costs in coalfields and provide reliable information to suppliers and consumers regarding mutual settlements. Research methods. The conditions of operation of the mine degassing system and the methods of monitoring its operational indicators for effective management of the technical condition of the object in the real conditions of the mine environment are considered. Approaches to continuous monitoring of well parameters using structural modules of the ACS of the DSH have been determined. Findings.The DSH ACS module was implemented in the real conditions of the mine environment, which made it possible to carry out automatic monitoring of the methane-air mixture, measurement and preparation for issuing to the operational personnel the current values of pressure drops on the diaphragms, absolute pressure, temperature and volume flow of gas. Originality. A new method of increasing the accuracy of commercial accounting of natural gas of coal deposits has been developed, which consists in constant monitoring of the technical condition of the degassing system and automated accounting of natural gas based on the «DIYA» measuring complex. The average hourly values of gas mass flow were obtained, as well as the difference between the data of the channel of the operating ASUTP KS and the channel of the "Ergomera"-126.MU controller in the complex with the "DIYA" operator station. Practical implications. A mine experiment was conducted on monitoring and control of mine degassing gas pipelines using innovative technical solutions for the rapid and systematic delivery of information about the parameters of the mine degassing system to the dispatch service. The structure, principle of operation, methodology for calculating the consumption of natural gases and coal field gases were developed, and industrial tests of an experimental sample of the ACS of the DSH were carried out with automatic entry of results into electronic reporting journals.

The Experimental Investigation of Double -Pass Solar Air Heater with V-Corrugated Plate, Phase -Change Material and Baffles Under Recycling Operation

The current paper presents an experimental work that had been implemented to observe the performance of an improved solar air heater and compared it with that of a conventional double-pass flat plate solar air heater. Improvements that have been added include the use of a V-shaped corrugated plate at an angle of 60 degrees, the addition of wood baffles in the lower pass and the use of phase-changing materials PCM as well as air recycling conditions. The heater was designed and tested under the weather conditions prevailing in the Duhok Governorate (latitude 36° 52' 1.52" N and longitude 42° 59' 18.42" E) in the Kurdistan Region of Iraq. The phase-changing material PCM is paraffin wax. The gathered results showed that the improvements that were added to the solar air heater significantly improved the performance at different mass flow values (0.037, 0.057, 0.077 kg/sec). For example, the maximum values of useful heat transfer at mass flow rates (0.037, 0.057, and 0.077kg/s) are 1.68, 1.86, and 2.34 kW, respectively, and the daily efficiency for improving and conventional heater value at mass flow rate 0.037kg/s for 15,16, and 17 of February on 2022 was (84% and 45%), (86% and 46%), and (91% and 60%), respectively.

Electro-osmotic drag coefficient of Nafion membrane with low water Content for Proton exchange membrane fuel cells

Proton exchange membrane fuel cells (PEMFCs) are recognized as promising clean power sources in automotive applications. However, there are still confusions and contradictions about the electro-osmotic drag (EOD) coefficient of Nafion membrane with low water content. In this work, the molecular dynamics (MD) simulation is utilized to predict the EOD coefficient in dehydrated Nafion membranes with low water content λ=1, 1.5 and 2 at 350 K for fuel cells under low relative humidity. Micro-structurally, it is found that when the dehydrated Nafion membrane gradually becomes more hydrated, or λ increases from 1 to 2, more water molecules are bound to Nafion side chains and larger atom clouds are formed. In order to predict the EOD coefficient, mass flows of hydronium ions and water molecules are analyzed. The hydronium ions flow much faster than water molecules in the direction of electric field. Consequently, based on the mass flow values, for the Nafion membrane with low water content λ=1, 1.5, and 2, values of the EOD coefficients are 0.098, 0.149 and 0.255, respectively. It is further discovered that the EOD coefficient for Nafion membrane with low water content exactly agree with the linear model nd=2.5λ/22.

Thermal Performance of a Counter-Flow Double-Pass Solar Air Heater With The Steady and Pulsating Flow

The present work studied the influence of pulsating flow as an active method on the thermal performance of a double-pass solar air heater with a tubular solar absorber. A ball valve has been used as a pulse generator mounted at the downstream flow of the solar air heater. The experiments were under indoor conditions with a constant heat flux of 1000 W/m2, and different air mass flow rates ranged from 0.01 to 0.03 kg/s. Moreover, the study covered three pulsation frequencies varied from 1 to 3 Hz. Based on the experimental outcomes, it can be observed that the heat transfer rate is enhanced by applying the pulsating flow, where it was found that the outlet temperature in the case of applying the pulsating flow rises by about 25.6 - 27% as compared with the steady flow case. Moreover, pulsating flow offers a higher effective thermal performance by about 15.2 % at the maximum air mass flow rate compared with the steady flow. In addition, the findings pointed out that varying the pulsation frequency from 1 to 3 Hz produces an enhancement in heat transfer rate and in solar heater effective efficiency, where it was found that when changing the frequency from 1 to 3, the increment of effective efficiency ranged from 3.8 to 6.9 % depending on the air mass flow value.

Examination of Energy Efficiency of Air Handling Unit with Integrated Air to Air Heat Exchanger in Cooling Mode

Object of the present study is an experimental determination of parameters, showing efficiency of air handling unit with integrated air to air heat exchanger in cooling mode: effectiveness of supply side of air to air heat exchanger, coefficient of performance and specific fan power of air handling unit. A daily performance of air handling unit in cooling mode is conducted. Effectiveness of supply side of air to air heat exchanger in range of 50.5 % to 74.3 % is received. Coefficient of performance in range of 0.88 to 2.99 and specific fan power of air handling unit in range of 1.77 kW/(m3/s) to 3.06 kW/(m3/s) are received. A relation between effectiveness of supply side of air to air heat exchanger and ratio of heat capacity rates of supply and exhaust air is received. Effectiveness of supply side of air to air heat exchanger depends on values of mass flow of supply and the exhaust air. High values of mass flow of exhaust air responds to high effectiveness of supply side of air to air heat exchanger.

Optimization of the gas-air path system parameters for trapping automotive fuel vapors

Introduction (statement of the problem and parameters relevance). The composition of the mixture of air and gasoline vapors differs in air and vapors ratio when purging the absorber at different time of the car operation. Therefore, the air-fuel mixture entering the engine for afterburning can create uncertainties in lambda control.The purposeof the research was to determine the main features of lambda regulation in an unstable fuel-air mixture.Methodology and research methods. An analysis of the mixed air and fuel vapor flows entering the engine during absorber purge was made. The composition and quantity effect of this mixture on the excess air coefficient was determined. The main parameters of air and gasoline vapor mixture in the fuel tank vapor space were established.Scientific novelty and results. An equation obtained testifies that the excess air coefficients in the flows of the fuel-air mixture relate to the mixture flow rate during absorber purge. The requirements for the composition of the fuel-air mixture leaving the absorber have been formulated. In order not to exceed these values the threshold values of short-term fuel supply were corrected and the relative mass flow value rate of gasoline vapors from the tank in relation to the air flow rate purge was determined.Practical significance. The factors limiting the flow sections of the absorber gas-air paths and the optimal ratios of the flow sections were determined on the example of a two-chamber absorber to exclude excessive enrichment of the fuel-air mixture entering the engine during purge.

Study on Convective Heat Transfer Characteristics of Supercritical Liquid Hydrogen in a U-Type Tube inside a Moderator

The flow and heat transfer characteristics of supercritical fluid in a U-tube have an important influence on the safe operation of a moderator, and the variation of gravity direction is suitable for special working conditions of the moderator. In this study, the three-dimensional turbulence flow and heat transfers of supercritical liquid hydrogen in a U-tube were investigated at an Re number ranging from 16,425 to 54,750 under constant heat flux (q = 80 kW/m2). The total length of the U-tube was 1725 mm, which had an entrance length L/D of 23, with the inner diameter and wall thickness of D × δ = 10 × 2 mm. The finite volume method was adopted, and the grid independence was verified by the grid convergence index (GCI). The calculation results of three turbulence models (SST k-w, RNG k-ε, Standard k-ε) were compared with the corresponding experimental data to obtain the turbulence model with the smallest error. The convective heat transfer characteristics with different values of heat flux (q = 30 kW/m2~100 kW/m2), mass flow (G = 3 g/s~10 g/s), and gravity (gx, gy, gz) were compared. Meanwhile, the heat transfer characteristics of supercritical liquid and conventional liquid hydrogen were compared. The results show that Nu increased from 5 g/s to 10 g/s by 56.6%, and mass flow rate had a greater impact on the variation of Nu; when gravity direction was consistent with the flow direction of liquid hydrogen (gx direction), the Nu number inside the channel was 4.21% and 5.56% higher than that in gy and gz direction, respectively. Supercritical liquid hydrogen has a stronger heat transfer ability than conventional liquid hydrogen, of which the Nu number is 16.7% higher. This study can provide useful guidance for the design of flow and heat transfer of supercritical liquid hydrogen in a U-tube and its application in moderators. Furthermore, it provides reference technical values for thermal safety and thermal management of the target station to ensure its safe and stable operation.

Thermodynamic analysis for a novel steam Rankine cycle based indirect chemical precooled engine used for supersonic flight

Chemical precooling technology is an effective way to improve flight speed for supersonic precooled engine cycle. To solve the problem of pipe blockage caused by the fuel coking in the pre-cooler, a new indirect chemical precooled engine combined with the steam Rankine cycle (SRC) is proposed, from which the chemical reaction is transferred from pre-cooler to regenerator. To evaluate engine performances, a thermodynamic model is developed and an experimental platform is established to obtain the fuel heat sinks. The simulation results indicate that the performances and operation range of SRC based engine are significantly higher than that of traditional Brayton cycle based engine. Further, the upper and lower boundaries of specific impulse and thrust correspond to the maximum and minimum values of fuel chemical reaction degree respectively. Moreover, the optimal values of water mass flow, turbine inlet temperature and compressor pressure ratio could be obtained at the point where the fuel is fully cracked. Finally, the SRC based engine could improve the specific thrust by 46.43–64.54% compared with the traditional ramjet, but the specific impulse is slightly lower than that of traditional turbojets and ramjets. In general, the results in this paper are beneficial for developing high-performance turbine combined engines.

Simultaneous reduction of NOx emission and SOx emission aided by improved efficiency of a Once-Through Benson Type Coal Boiler

With significant contributions in global emissions of air pollutants, sustainable practices for coal-fired power generation are fundamental to mitigate global climate change, besides ensuring compliance to the local authorities, which is as critical as climate issues. Despite the importance of these issues, some gaps exist in the literature to develop practices capable of fostering emissions reduction of NOx and SOx. In this sense, the present study aimed to present a comprehensive approach to NOx emission and SOx emission reduction through improved efficiency of a once-through Benson type coal boiler in a coal-fired power plant. In improving efficiency, NOx and SOx emissions were strongly influenced by O2 concentration, coal mass flow, air/fuel ratio and coal calorific value. The optimum conditions that resulted in simultaneous reduction of NOx and SOx emissions were achieved when the O2 concentration was 3.28 vol% with the coal mass flow of 281 tonnes/hr. The results further suggested that NOx concentration was reduced by a large margin when the air/fuel ratio changed from the lean side to the rich side. The findings of this study help to establish benchmarks relating to a comprehensive assessment of SOx and NOx emissions reduction.

Comparison of the performance of fixed and two-axis movable solar air heaters with different methods

ABSTRACT Usually, the solar air heater (SAH) is placed in a fixed position based on the tilt angle. This situation adversely affects the thermal performance of the collector, considering the natural motion of the sun. In this experimental study, two SAHs of equal dimensions were designed. A PLC solar tracking system was integrated into one of the SAHs to track the sun in two directions (East-West, North-South). The thermal efficiency values of the SAHs were calculated according to three different mass flow values of the air in the SAH by using the “I” and “II” laws of thermodynamics. It was observed that movable SAH has two times more average heat transfer value, 47.8% more energy efficiency, 2.4 times more exergy efficiency, 20% more coefficient of performance (COP) value, and 23.8% more average collector outlet temperature than fixed SAH. In addition, it was measured that the average irradiance on the absorber plate in the movable SAH is 38% higher than the fixed SAH. After, CFD analysis modeling was carried out for SAH outlet temperature values. The SAH outlet temperature values modeled by CFD analysis were compared with the experimental results. SAH outlet temperature value model was modeled by CFD with less than 1% error value for turbulent flow. As a result of the calculations made with experimental data, it was shown that the PLC tracking feature was an important method to use solar energy more effectively on SAH.

Economic dispatch for a regionally integrated heat and electricity system with variable pipeline flow direction

Traditional models of heating networks are not able to take into account the changes in the value and the direction of pipeline mass flow in a multi-heat-source district heating network or the time delay characteristics of the network with constant temperature and variable flow operation. A day-ahead dispatch model for regional integrated heating and electricity system based on improved second-order cone programming method is therefore proposed. We first construct a heating network transmission model with variable value and direction of pipeline mass flow, and then use a convex relaxation to transform this nonlinear model into a mixed-integer second-order cone programming model. A hydraulic time-delay correction model is then constructed to reflect the dynamic characteristics of the heating network under variable mass flow conditions. Finally, we establish a model of an electric boiler with thermal storage to improve the flexibility of the distribution network. Case studies are used to show that the optimised results are more economical in terms of both the variable value and direction of mass flow. The proposed programming method retains the variability in the flow direction and achieves precise relaxation without the need to solve for the initial value. We also verify that the hydraulic time delay characteristics have a strong influence on the optimised results of the regionally integrated heat–electricity system under conditions of constant temperature and variable flow. In addition, an electric boiler with thermal storage can reduce renewable energy curtailment and effectively improve operational flexibility.

Exploration of the effect of two-axis PLC solar tracking system on the thermal performance of solar air collector

In the present study, the effects of a solar tracking system on the thermal performance of the solar air collector (SAC) were investigated in detail. Two SACs of equal size were designed to reveal the effect of the solar tracking system. One of the SACs was fixed at 38° South-East; on the other SAC, two-axis PLC solar tracking system was integrated. Thermal efficiency analyses were carried out for both SACs at three different airflow rates under the same environmental conditions. While the highest energy efficiency value was calculated as 86% for the movable SAC, the lowest energy efficiency value was calculated for the fixed SAC as 14%. It was determined that the average exergy efficiency value of the movable SAC is 2.8 times higher than the exergy efficiency value of the fixed SAC. In addition, it was shown that the average SAC input-output temperature difference was increased by two times with the help of the solar tracking system. Also, according to the economic analysis, it has been observed that the movable SAC was two times more environmentally friendly than the fixed SAC. Additionally, it was revealed that the movable SAC has 2.13 times more heat transfer value than the fixed SAC. In addition to all these, Nu values obtained for three different mass flow values in SAC were compared with different Nu correlations in the literature, and it was shown that the experimental Nu values were compatible with these correlations. According to the experimental data, it was clearly stated that the solar tracking system significantly improves the thermal performance of the SAC.

Effect of integrating high flow naturally driven dual solar air heaters with Trombe wall

Trombe wall is one of the sustainable architectural designs in the building that offers significant opportunities for energy saving and contribute to the low green-house emissions. Naturally or buoyancy driven dual solar air heaters (SAH) are barely used in building sector with Trombe wall due to its low mass flow rates and low efficiency. In this paper, a new concept of integrating high flow naturally driven dual heating system of Trombe wall integrated with SAH has been numerically investigated, optimized and an efficient design configuration is proposed. Total seven independent configurations namely type-1 to 7 have been investigated wherein type-1 and 2 is SAH coupled with a vertical chimney, type-3 has SAH coupled with Trombe wall, and type-4 to 7 are SAH coupled with Trombe wall having bell-mouth inlet opening for improved hydraulic performance for rapid space heating. It is observed that if Trombe wall is integrated suitably with bell-mouth inlet, SAH along with chimney, it can significantly increase the mass flow rates of heated air by about 2.5 times the convectional design. It is also observed that with increase in mass flow rates, system shows significant exergy gain of 142% when compared to conventional design. Time needed to heat a given space from a specific initial temperature are also calculated using first law of thermodynamics with mass flow values taken from the model and compared with conventional design. It was noted that to heat a given space to a desired temperature, new system of dual SAH takes about 70% less time. The proposed coupled Trombe wall-SAH device has shorter payback period and could save tons of greenhouse gas emissions annually compared to the conventional fossil fuel-based heating systems. Thermal comfort of the occupant can be enhanced with dual SAH-Trombe wall system resulting in significant energy saving.

Investigation of the flow, pressure drop characteristics, and augmentation of heat performance in a 3D flow pipe based on different inserts of twisted tape configurations

AbstractThe flow behavior, pressure drop, and heat performance rate in the three‐dimensional pipe with and without inserted tape are analyzed in his study. The enhancement of thermohydraulic performance is carried out by increasing the twisted tape configurations with different Re. The numerical simulation model is validated with experimental data, where the outcomes indicate a good agreement between both data. The results revealed that the pressure drop across the pipe using twisted tape insert was higher than in a smooth pipe. The increased drop in pressure along the pipe enhanced the performance of heat transfer. In addition, there was a rise in fluid velocity, but it was nonuniform. This happened due to the swirl created through the inserted tape in the pipe. The comparative study also specified that the profiles of dynamic pressure, static pressure, velocity magnitude, and vorticity are nonuniform, compared with the smooth tube type. Moreover, the results found that the best improvement of heat transfer is at a low value of mass flow with a twisted tape of 1 × 3 mm, which is equal to approximately 27.7%, 26.5%, 26.4%, and 22.9% respectively. Furthermore, this study provides numerical investigations for engineering design on flow field analysis and enhanced heat transfer performance with different insert tape configurations.

РАСЧЕТ ПРОЦЕССОВ ТЕПЛОМАССООБМЕНА В КАНАЛАХ ОРОСИТЕЛЕЙ ВЕНТИЛЯТОРНЫХ ГРАДИРЕН ПРИ НАЛИЧИИ УЧАСТКА ВЛАЖНОГО НАСЫЩЕННОГО ВОЗДУХА

The flow of air in the fan cooling tower sprinkler channels in certain initial conditions may be characterized by the presence of a section of saturated humid air. In this case, the calculation of mass transfer according to the criterion equation of mass transfer, obtained from the analogy of the processes of heat and mass transfer, gives an overestimated result of the mass flow value. For the section of saturated air, the intensity of the mass transfer process is calculated using the function of changing the density of saturated steam from the air temperature. The works studying water cooling processes in the fan cooling tower sprinkler channels contain no assessment of the influence the saturated air presence has on the intensity of water cooling. The paper proposes a method for calculating the processes of heat and mass transfer in the cooling tower channels in the presence of a section of saturated air flow, taking into account the peculiarities of calculating mass transfer between water and saturated air. The values of the discrepancy between the final water temperature in calculations according to the proposed method and the method for unsaturated air are given. It is shown that the presence of a saturated air zone leads to an increase in the final temperature of the water compared to the calculations using formulas for unsaturated air. It is revealed that the discrepancy of water temperature calculated by different methods increases with the length of the channel, the value of the initial relative humidity of the air decreases with the growth in the initial air temperature. The offered methodology and obtained results can be used in the deve¬lopment of regime maps and at the design stage of fan cooling towers.

A regional integrated energy system with a coal-fired CHP plant, screw turbine and solar thermal utilization: Scenarios for China

Regional integrated energy system has been a suitable scheme in China to satisfy eco-industrial park’s both electric and heat needs. Combined heat and power (CHP) is an efficient technology for coal-fired plants during heating seasons. Currently, wires transport electric from CHP to destination while urban pipes network transport heat from CHP to destination, respectively. However, this might not be the case in future, when eco-industrial parks are close to plants or pipes network can’t carry enough heat. This paper presents a feasible regional integrated energy system which meets both electric and heat’s needs with steam from CHP while maintaining photothermal resources’ high percent utilization. This system includes a coal-fired CHP plant, pressure matcher, steam supply pipeline, screw turbine and solar thermal utilization part. This paper set up a model of 600 MW electric power CHP with pressure matcher and screw turbine in Ebsilon software. Then the steam supply pipeline and solar thermal utilization part were developed and analyzed based on the basic thermodynamic theories with Beijing and Huzhou’s meteorological statistics taken into consideration. Besides, the operational issues of the regional system were also listed. Meanwhile, the regional integrated energy system was obtained and a lot of characteristics were analyzed. Main devices were further investigated with energy, exergy and entransy analysis. Three extreme working situations were also carried out and discussed in the end. Several useful conclusions were drawn. It’s necessary for China to masterly integrate regional energy system with multi-energy. Moreover, pressure matcher is high-efficient in general under other parameters’ influences. This extracting steam’s technology might be considered in future. Besides, low-stent placed pipeline which can transport high-parameter steam 4 km at most was introduced. A proper mass flow value or lower inlet temperature will both reduce loss of pipeline. Furthermore, heat user side can offer electric power about 9.22 MW, heating acreage about 0.79 km2 to the eco-industrial park. More solar heat’s import, lower upper temperature difference and less sunlight will favor solar thermal utilization part. Higher heat load or lower CHP’s working condition will benefit screw turbine. Peak heat exchanger doesn’t need to work when supply domestic water temperature’s demand is less than 65 °C. The simulation in this paper might give technological statistics to the regional integrated energy system which has CHP and photothermal. This will help to put this energy system into actual use in future.

Thermal analysis of a parabolic trough solar collector with synthetic oil as working fluid using a computational tool

This work describes the use of a computational tool to assess a previously built parabolic trough solar collector (PTC) that uses a working fluid in liquid state. This work is focused on the thermal analysis of a PTC collector considering two common used synthetic oils: Syltherm 800 and Therminol VP1. The designing characteristics of the commercial LS3 solar collector was selected and as solar resource, the solar irradiance that reaches Mexico City was used with twelve monthly average values along the year. The computational tool provides thermal and flow data for every synthetic oil and for every solar irradiance value used. The most important data computed is the mass flow, which is obtained through iterative processes until the necessary value is found, in order to satisfy the working fluid final temperature for the synthetic oil, once the optimum mass flow value is found, the collector thermal parameters are computed, such as: heat gain, heat losses, thermal efficiency, and the temperatures for the absorber and coating tubes. The computational tool can assess any PTC collector with any working fluid in liquid state, and the data obtained can be used to improve of modify the design of the collector for a better performance.