Values Of Air Flow Rate Research Articles

Segregation of binary particles in pulsed gas-solid fluidized bed

Pulsating airflow-driven gas-solid fluidization is an effective method to segregate particles of different densities. The current article presents an elaborate computational study on the development of simulation methodology, and parametric trend identification of pulsating airflow-driven granular segregation for the first time using computational fluid dynamics (CFD), discrete element modeling (DEM) coupled analysis. The rigorous validation of the computational prediction has been produced against the experimental result reported by Li et al. (2021) and an excellent agreement has been observed. Segregation behavior for different density ratios of particles, different patterns of pulsation, and different particle shapes is presented in the current article. The segregation index improves with the density ratio of the binary mixture of particles, but the rate of increment of the segregation index is highly dependent on the airflow rate. Near the optimal value of airflow rate, the rate of increment of the segregation index reduces with the density ratio. Keeping the bed height and material property constant, different patterns of pulsation namely—sinusoidal, triangular, and exponential have been adopted. The segregation index is higher for sinusoidal patterns, whereas it reduces when the pattern is changed to triangular and exponential. Particles of constant volume with different shapes are also considered to understand the effect of particle shape on segregation. The segregation index deteriorates with the increasing surface area of the particle at constant volume.

An evacuated tube solar bubble column liquid desiccant regenerator

Liquid desiccant air conditioners (LDAC) are environmentally friendly, require less energy, and can improve air quality. These systems are composed of two main parts: a dehumidifier and a regenerator which are heat and mass exchanger devices that are the main bottlenecks on the overall performance of LDAC systems. Despite their numerous advantages over conventional regenerators, bubble column regenerators have only been studied adiabatically. To address this gap in the literature, an internally heated bubble column regenerator is proposed that is heated with an evacuated tube solar collector while also eliminating the previous issues with corrosion. A prototype was constructed, and the effect of various values of air flow rate, air injection depth, and initial desiccant concentration was studied experimentally in 10 cases (8 modified cases, 2 conventional cases). The results showed that initial concentration has the highest impact on the device’s performance. Increasing air flow rate led to higher water extraction. Air injection depth had no significant impact on the device’s output. In Case 10 (10 L/min air flow rate, 50 cm hose depth, and 30 % initial desiccant concentration), a maximum of 576 g of water was removed from the desiccant. The maximum improvement over the conventional case was 139 % which was achieved in Case 5 (10 L/min air flow rate, 50 cm hose depth, and 35 % initial desiccant concentration). The exergy efficiency for Case 10 was the highest, reaching 8.5 % at the end of the experiment.

Numerical simulation of pneumatic throttle check valve using computational fluid dynamics (CFD)

The article presents a numerical CFD simulation of a throttle-check valve used in an innovative control system for two pneumatic drives. This type of control is used in an innovative rehabilitation device for lower limbs. In order to determine the boundary conditions, experimental tests were carried out. The throttle valves on the test stand were scaled and the air flow rate values were read for different valve opening heights. The purpose of this article is to present a CFD simulation of a pre-adjusted check valve throttle. Numerical simulation (CFD) makes it possible to study the flow phenomena inside a pneumatic throttle-check valve, with different sizes of flow gaps. The obtained results made it possible to determine the distribution of physical quantities of static pressure, the velocity of the medium flowing through the valve, or the vector velocity distribution. The throttle valve assembly has been scaled for a suitable degree of synchronization of the movement of the piston actuators independently of the different external loads acting on each of them. The authors investigated airflow phenomena for different valve opening heights. The simulation provided information on the occurrence of supersonic and subsonic flow velocities at specific valve opening heights.

Nonlinear characterization of azimuthal combustion instability exhibiting flame transient phenomena

This article characterizes the nonlinear features observed in an annular combustor exhibiting self-excited azimuthal thermoacoustic instability. The annular combustor consists of 12 burners with flames stabilized by bluff bodies protruding into the combustion chamber. This burner configuration closely resembles the flame stabilization geometry and flame shape in ramjet and afterburners configurations. As a first step, two different bluff bodies stabilize the flame: 1) circular and 2) conical and associated instability dynamics are characterized. The combustor exhibits intermittent oscillation in pressure with dominant 1A-1L (first azimuthal - first longitudinal) acoustic mode at about 630 Hz. The duration of periodic oscillation in the intermittent pressure fluctuation varies non-monotonically with the airflow rate. Further, relatively large amplitude pressure fluctuations are observed for intermediate values of airflow rate in both flame stabilization. During these large-amplitude pressure fluctuations, localized flame extinction in certain burners is observed, leading to partial blow-off operation of the combustor. This localized flame extinction is subsequently followed by either successful or unsuccessful re-ignition, leading to introduction of slow time scale heat release rate modulation in the problem. Further, this slow time scale heat release rate modulation is stochastic, contributing to the appearance of intermittent oscillation in pressure.

Sewage sludge ashes as a primary catalyst for the abatement of tar in biomass gasification: Bubbling versus spouted‐fluidized bed configuration

AbstractSewage sludge (SS) ashes, rich in iron and calcium, have been tested as a primary catalyst during air gasification of commercial wood pellets in a pre‐pilot scale fluidized bed (FB) reactor. The shifting from a conventional fluidized bed to a spouted‐fluidized bed configuration has been assessed on the catalyst performance. Specifically, at constant total air inlet flow rate, two different values of the air flow rate in a central spouting nozzle have been adopted, which correspond to 20% and 37.5% of the total inlet gas flow rate. Under the conventional fluidized bed configuration (i.e., bubbling regime), SS ashes exhibit good performance in term of tar reduction (about 20% decrease compared to a bed of inert silica sand), without significantly affecting the syngas composition. Concerning the transition to the spouted‐fluid bed configuration, the gas‐solid contact efficiency is enhanced at lower air flow rates through the central nozzle, with respect to the FB regime, leading to better gasification performance in terms of tar reduction (around 40% less) and syngas quality. A slightly worse gasification performance is obtained at high values of air flow rate in the central nozzle, due to a progressive increase of gas bed bypassing. Furthermore, moving from the conventional FB configuration to the spouted‐fluid bed one dramatically boosts the elutriation rate of carbon fines as well as the attrition of catalyst particles.

The contribution of patients' lung function to the inspiratory airflow rate achievable through a DPIs' simulator reproducing different intrinsic resistance rates.

BackgroundThe performance of DPIs depends on several physiological (patient-dependent) and technological (device-dependent) factors. The inspiratory airflow rate is the only active force generated and operating in the system for inducing the required pressure drop and eliciting the resistance-induced turbulence needed to disaggregate the powder through the device. The present study aimed to investigate in the most prevalent respiratory disorders whether and at what extent the inspiratory airflow rate achievable when inhaling through a DPIs’ simulator reproducing different intrinsic resistance regimens (low, mid, and high resistance) is affected by peculiar changes in lung function and/or can be predicted by any specific lung function parameter.MethodsThe inspiratory airflow rate was assessed in randomized order by the In-Check DIAL G16 at low, mid, and high resistance regimens in a sample of consecutive subjects at recruitment. Independent predictors of the probability to achieve the expected inhalation airflow rate were investigated by means of a multivariate logistic regression model, specific to the disease.ResultsA total of 114 subjects were recruited (asthmatics n=30; COPD n=50, restrictive patients n=16, and normal subjects n=18). The mean values of the expected inspiratory airflow rate achieved proved significantly different within the groups (p<0.0001), independently of sex and age. In asthmatics and in COPD patients, the mid-resistance regimen proved highly associated with the highest mean values of airflow rates obtained. Low- and high-resistance regimens were significantly less likely to consent to achieve the expected level of inspiratory airflow rate (OR<1 in all comparisons). Restrictive patients performed the lowest airflow rates at the low-resistance regimen (p<0.01). Unlike FEV1, RV in asthmatics (OR=1.008); RV and IRaw in COPD (OR=0.587 and OR=0.901, respectively), and FIF and TLC in restrictive patients (OR=1.041, and OR=0.962, respectively) proved the only sensitive predictors of the inspiratory airflow rate achievable at the different resistive regimens.ConclusionsThe intrinsic resistive regimen of DPIs can play a critical role. The patients’ lung function profile also affects the extent of their inhalation airflow rate. Some specific lung function parameters (such as: FIF; RV; IRaw; TLC, but not FEV1) may be regarded as specific predictors in real-life. In order to optimize the DPI choice, further to the device’s technology, also the current patients’ lung function should be properly investigated and carefully assessed.

Upgrading of the Performance of an Air-to-Air Heat Exchanger Using Graphene/Water Nanofluid

The aim of this study is to improve the thermal performance of air-to-air heat recovery units, containing heat pipes by using graphene/water nanofluid as a working fluid. The experimental set up of this work consists of two air ducts. To study the effect of the airflow rate and the temperature on the performance of the heat recovery unit, different values of airflow rates and temperatures are used. The values of Re numbers are calculated for each air duct. These Re numbers referred to the turbulent flow type in all cases. To compare the results of the graphene/water nanofluid and the pure water working fluid, thermal efficiency and thermal resistance values are calculated for both of them. The results showed that the graphene/water nanofluid was more efficient than pure water in all different conditions. Re number in the cold air duct was 6800, and the Re number in the hot air duct was 9000. The maximum thermal efficiency values were 34.1 % and 20.1 % for graphene/water nanofluid and pure water, respectively. The maximum improvement rate in thermal efficiency was 87.7 % when the average Re number in cold and hot air ducts was equal to 11,150 and 11,650, respectively. By comparing the results of graphene/water nanofluid with those of the pure water, it can be seen that using graphene/water nanofluid decreased the thermal resistance of the heat pipes. Therefore, the heat transfer increased. The maximum decreasing value of the thermal resistance was 52.3 % when cold and hot air duct Re numbers were 11,700 and 11,000, respectively.

Experimental analysis of a new generation of membrane liquid desiccant air-conditioning (LDAC) system with free convection of desiccant for energy economic management

Abstract A new generation of membrane liquid desiccant air-conditioning (LDAC) system with free convection of desiccant is investigated experimentally. The free convection LDAC systems have benefits over conventional air conditioning (AC) systems with the added advantage of system operation with no circulating pump. The prototype system made up of mainly two externally cooled hollow fiber membrane (HFM) liquid-to-air energy exchangers worked as dehumidifiers and regenerators. The performance of the system studied under the standard summer air conditions, and a thorough study was done to reveal its behavior as an AC system in different airflow rates. The coefficient of performance (COP) of the system is 0.85 at the base condition, and the sensible heat factor (SHF) of the dehumidifier ranged between 0.24 and 0.4 for different operating conditions. The heat and moisture removal rate and sensible heat factor increased while the electrical and thermal coefficients of performance (ECOP and TCOP) decreased by the airflow rate increase. While the value of TCOP is approximately the same for all operating conditions, the ECOP is very sensitive to airflow rate, and its value reduced by 82% as the value of airflow rate tripled. It is inferred that unlike the forced energy transfer loops, it is mainly the solution side transfer coefficients that determine the system performance, and between the heat and moisture transfer coefficients, the latter is more effective on system performance.

An experimental study of a photovoltaic thermal air collector (PVTAC): A comparison of a flat and the wavy collector

In this work, a comparative experimental energy and exergy analysis of photovoltaic thermal air collector (PVTAC) with a flat plate (model-I) and wavy plate (model-II) as a solar thermal collector is performed. Integration wavy plate is expected to enhance the rate of redistribution of fluid flow and thus to enhance the heat extraction rate. Thereby helps to control the temperature of the PV module during higher solar insolation, during which the conversion efficiency of the PV module tends to decrease. The experimental investigation of performance enhancement of PVTAC is carried out at different values of airflow rates of 0.0047–0.0165 kg/s. Results indicate that the highest overall thermal energy and overall thermal exergy of the PVTAC system are obtained during noontime. Comparative analysis indicates, at noon, model-II provides a higher yield of thermal energy, exergy, and net electrical energy by 16%, 27.4%, and 1.2% than that of model-I. Presence of the wavy plate increases the magnitude pressure drop for model-II than that of model-I. Despite meeting the requirement of higher pumping power, model-II provides 8.4% and 1.3% higher overall thermal efficiency and overall exergy efficiency than that of the model-I.

AUTOMATION CONTROL SYSTEM OF TECHNICAL CONDITION OF GAS TURBINE ENGINE COMPRESSOR

The article is devoted to one of the approaches to the construction of an automated system for solving the problems of diagnostics and monitoring of the flow duct of aircraft gas turbine engines and gas turbine plants. Timely detection of faults and subsequent monitoring of their development in operation are possible thanks to automated systems for assessing the technical condition of engines. This is particularly relevant in operating conditions as the knowledge of the technical condition of the engine is necessary in any engine maintenance system allows to choose the content and timing of maintenance, repair of the flow duct of gas turbine engines and gas turbine plants, as well as commissioning. The engineering technique, which can be applied at performance of maintenance and at stages of tests and debugging of aircraft engines, is considered. The automated system implements a method of measuring the air flow through the compressor and a technique for assessing the technical condition of the compressor by the relative change in air flow. To determine the air flow rate through the gas turbine engine, it is sufficient to measure only static pressure values in the flow part. The static pressure receivers are not located in the flow part and do not obscure it, and thus do not affect the compressor gas dynamic stability margin. The inspection area is selected for measuring in the flow duct of the air intake. Static pressure in the maximum and minimum cross sections of the chosen area is measured; the maximum cross-section area of the flow duct, the total temperature of the air flow is measured outside the air intake. To determine the air flow rate, the functional dependence of the air flow rate on the static pressure is used. The algorithm for monitoring and diagnosing the operating condition of the engine is based on a comparison of the actual values of air flow rate with the air flow rate determined during the control tests or when using a mathematical model adapted for this gas turbine engine. The positive effect of the using of the proposed automated control system of technical condition is that the air flow rate measured under operating conditions will significantly increase the objectivity of the control of the operation and technical condition of the gas turbine engine.

Benefits from heat pipe integration in H2/H2O fed SOFC systems

The Solid oxide fuel cell (SOFC) is an electrochemical energy-conversion device considered as a promising solution because of its high electrical efficiency, fuel flexibility and modularity with relevant environmental benefits. However, high temperatures and thermal gradients cause significant problems for the practical application of SOFC systems. SOFC operating conditions have to be maintained within specific bounds with limitation in the maximum achievable current density in order to avoid excessive degradation. Relevant air flow rate values are also required for a correct thermal management, dealing with the highly exothermicity of the SOFC operation. In this context, the integration of planar liquid metal heat pipes into the stack structure can contribute to reduce thermal gradients within the stack itself while lowering the parasitic consumption of the air blower since less convective cooling is required. In the present work, a model implementing different SOFC cells interposed between two planar heat pipe plates filled with sodium is developed. In particular, an SOFC system fed with a H2/H2O mixture is assessed (the most stringent thermal condition because of the absence of internal reforming). The maximum permissible current density is then evaluated by varying the air utilization factor (AU). The limiting operating conditions are identified by taking into account the following constraints: maximum cell temperature, maximum global and local temperature gradients and heat pipe transport limits. A comparison of the system with and without the presence of heat pipes is then carried out with the aim of highlighting the positive effects derived from their integration. Results from simulations show a remarkable improvement of the system performance with heat pipes, which allow to reach higher values of current densities (and so power densities) with a consequent economic benefit.

Laboratory Investigation on Hydrodynamic Performance of an Innovative Aeration Device with a Wave-Driven Heaving Buoy

Coastal seawater quality is of significance for the environment, ecology and fisheries. In recent years, the hypoxia or anoxia problems of bottom seawater aggravated due mainly to the seawater stratification and eutrophication. This paper addresses an innovative aeration device with a wave-driven heaving buoy to enhance the dissolved oxygen concentration for bottom water. A series of physical experiments was conducted to investigate its hydrodynamic performance and air flow rate. The response amplitude of heaving components and the average value of air flow rate were examined with the related parameters, including incident wave height, incident wave steepness and aeration depth. It was found that with increasing incident wave height, the average heaving displacement and the average air flow rate increase respectively. With the increase of incident wave steepness, the relative value of average heaving displacement increases obviously for high wave period scenarios, it increases slightly for small wave period scenarios in comparison and the relative value of air flow rate increases evidently. With the increase of aeration depth, the average heaving displacement and the average air flow rate decrease respectively. With the increase of relative aeration depth, the relative value of average heaving displacement and the relative value of air flow rate decrease respectively. In addition, the dimensional analysis and the least squares methods were used to obtain the prediction formulas for the average heaving displacement and the average air flow rate, and they agreed well with the related experimental data.

On the performance of a baffled glazed-bladed entrance solar air heater

The performance of a baffled glazed-bladed entrance air heater (BGBSAH) was experimentally investigated and compared with a conventional one at the same operating conditions. The solar air heater was modified at the entrance region. This region was covered with a glass coverinstead of a steel one to increase the heating area exposed to solar radiation (IR). In addition, the entrance region was boosted by guide blades to affirm a good air distribution inside the heater. Baffles attached to nineteen longitudinal fins were fixed inside the heater. These baffles were used to increase the heat transfer area, the length of air flow path, and the heat capacity of SAH via increasing the mass of the material. Three various numbers of baffles (170, 410 and 800) were used. Moreover, four values of air flow rates ranged from 0.013 to 0.04 kg/s were investigated. The results showed that, at the same mass flow rate, the performance of SAH was directly proportional to the baffles number. In addition, the results revealed that the maximum daily temperature difference obtained from the BGBSAH with 800 baffles was 51.9 °C compared to 22.7 °C for the conventional one at 0.013 kg/s. Besides, the daily efficiency was improved by 29.91–51.69% in case of BGBSAH with 800 baffles compared to the conventional one. For conventional SAH the average cost per kW is 0.0146 $ while for BGBSAH are 0.00733, 0.00787 and 0.0084 $ for 800, 410 and 170 baffles, respectively.

Influence of fin height on the performance of a glazed and bladed entrance single-pass solar air heater

This paper communicates experimentally improving the performance of an entrance-modified single-pass Solar Air Heater (SAH) having nineteen longitudinal fins. The longitudinal fins were used to increase the heat transfer area and to distribute the air flow uniformly in the channel. Experiments were conducted at three various heights of fins (3, 5, and 8 cm) to investigate the effect of the height. To increase the heating area exposed to solar radiation, the entrance region was covered by a glass instead of steel cover. As well, guide blades were attached to the entrance for ensuring good air distribution over the surface of the absorber, and hence enhancing the performance. Experiments were conducted under four values of air flow rates ranged from 0.013 to 0.04 kg/s. Experimental results were compared with that obtained from a conventional SAH at the same operating conditions to evaluate the proposed SAH performance. The maximum daily efficiency of the ordinary finned SAH was 43.1% at 0.04 kg/s and 8 cm fins’ height. Modifying the entrance region led to good enhancement in both output temperature and efficiency. For the modified finned SAH, the highest daily efficiency was 57% at 0.04 kg/s with fins’ height of 8 cm. While for the conventional SAH, the highest daily efficiency was about 32%.

Quantification of the thermal resistance variation in evaporators surface due to ice formation

Refrigeration takes a very important role in society. Nowadays, a big portion of the refrigeration processes are taken into account in the food and drinks storage, and also in the cooling of closed spaces. The method of heat removal from the surrounding air through the evaporation of a fluid, being a process of continuous improving, has suffered many enhancements in order to obtain better energetic consumption levels. One of the main restrictions of the usual refrigeration mechanisms is the icing verified in the external surface of the evaporators, as a part of the refrigeration cycle. The present work discusses the mitigation process of ice formation through a proposed heat exchangers configuration. The experimental unit built for this purpose allows the ice layer formation over the heat exchangers surface for several values of air flow rate, temperature and relative humidity. The evaluation of the thermal resistance of the heat exchangers surface together with the condensates collected provides an insight of the consequences of the different air conditions and of the proposed configurations on the ice formation process.

Treatment of industrial organic raffinate containing pyridine and its derivatives by coupling of catalytic wet air oxidation and biological processes

The treatment of non-biodegradable industrial organic raffinate containing refractory and toxic organic compounds pyridine, β-picoline and 3-cyanopyridine has been studied by coupling of catalytic wet air oxidation (CWAO) over alumina based platinum catalyst and biological processes. The alumina based platinum catalyst was characterized and the stability of the catalyst was studied. The CWAO experiments were performed in a glass reactor at atmospheric pressure and the effluent treatment efficiency was evaluated in terms of chemical oxygen demand (COD) removal. The effect of various parameters such as air flow rate, reaction temperature, platinum loading and catalyst dosage on the COD removal was studied. The optimum values of air flow rate, platinum loading and catalyst dosage were found to be 1 L/min, 1 wt. % and 3 g/L respectively and a COD removal of 45% was obtained at the optimum conditions at reaction temperature of 70 °C. The CWAO experimental results were found to be in agreement with the lumped kinetic model. The toxicity test using E. coli bacteria and the biodegradability study were performed. The toxicity of the effluent decreased considerably while the BOD/COD ratio was found to increase significantly after the CWAO. The aerobic biological treatment confirmed the biodegradability enhancement and a total COD removal of 98.4% was obtained after 10 days of aerobic treatment of the CWAO effluent.

Study of connected system of automatic control of load and operation efficiency of a steam boiler with extremal controller on a simulation model

The problems of operation effectiveness increase of steam boilers are considered. To maintain the optimum fuel combustion modes, it is proposed to use an extremal controller (EC) determining the value of airflow rate, at which the boiler generating the desired amount of heat will consume a minimum amount of fuel. EC sets the determined value of airflow rate to airflow rate controller (ARC). The test results of numerical simulation dynamic nonlinear model of steam boiler with the connected system of automatic control of load and combustion efficiency using EC are presented. The model is created in the Simulink modeling package of MATLAB software and can be used to optimize the combustion modes. Based on the modeling results, the conclusion was drawn about the possibility in principle of simultaneously boiler load control and optimizing by EC the combustion modes when changing the fuel combustion heat and the boiler characteristics and its operating mode. It is shown that it is possible to automatically control the operation efficiency of steam boilers when using EC without applying the standard flue gas analyzers. The article considers the numerical simulation dynamic model of steam boiler with the schemes of control of fuel consumption and airflow rate, the steam pressure and EC; the purpose of using EC in the scheme with linear controllers and the requirements to the quality of its operation; the results of operation of boiler control schemes without EC with estimation of influence of roughness of thermal mode maps on the nature of static and dynamic connection of the control units of fuel consumption and airflow rate; the phase trajectories and the diagrams of transient processes occurring in the control scheme with EC with stepped changing the fuel quality and boiler characteristics; analysis of modeling results and prospects for using EC in the control schemes of boilers.

Combustion characteristics of wheat straw in a fixed bed

ABSTRACTCombustion of wheat straw was investigated in a fixed-bed reactor for two air flow rates, 1,151 and 2,125 kg/m2h. Measured temperatures, mass loss, and gas composition were used to evaluate the combustion characteristics in terms of ignition front speed, burning rate, and quality of combustion in general. At lower value of air flow rate difference between the ignition rate and burning rate was significant, which can be easily noticed by the measurement results. At higher value of air flow rate, there was still a small difference between the ignition and burning rate, while the content of oxygen in the flue gas was 10%, which leads to the conclusion that a change in the method of delivering the combustion air is necessary.

Development and optimization of a triboelectrification bioseparation process for dry fractionation of legume flours

Abstract A novel solvent-free tribo-electrostatic separation technique for the fractionation of legume flour has been explored with the aim of producing protein- and carbohydrate-enriched fractions from navy bean ( Phaseolus vulgaris ) flour as a model system. The process consisted of a fluidized bed flour reservoir, polytetrafluoroethylene (PTFE) tribo-charging tube, and a plate-type separation chamber. The optimization of the single-stage tribo-electrostatic separation of navy bean flour was successfully carried out by designing a mixed level full factorial (4 1 × 2 3 ) experiment, followed by analyzing the data with a multiple linear regression model. The influence of process parameters on the protein content and protein separation efficiency of the resulting protein-enriched fractions was evaluated. Air flow rate, plate voltage, and tribo-charger tube length were found to have a significant impact on the protein content and separation efficiency. Although plate angle had no significant impact on the protein content, interactions with air flow rate, plate voltage and tribo-charger tube length were found to have a significant influence on the protein separation efficiency. The optimal values of air flow rate, tribo-charger length, plate voltage and plate angle were found to be 7 LPM, 240 cm, −6.5 kV and 20°, respectively. The protein-enriched fraction produced at the optimum conditions had a protein content of 38.1% accounting for 50.4% of the total protein. Good agreement was observed between the experimental and predicted values.

PERFORMANCE EVALUATION OF AN INCORPORATION OF A COMPACT LIQUID DESICCANT SYSTEM INTO AN EVAPORATIVE COOLING-ASSISTED 100% OUTDOOR AIR SYSTEM

The primary goal of this paper is to suggest incorporation of a compact liquid desiccant system into an evaporative coolingassisted 100% outdoor air system as an alternative proposal to the traditional vapor compression refrigeration system, especially with small loads, as well as to counteract the variation of climates. Current study presents an experimental analysis for building air conditioning system with using a LiCl aqueous solution as a liquid desiccant. Four air flow rate values are used for obtaining variable values of cooling capacity. Thermal and electrical COP is adopted to evaluate the system performance. The proposed system has the ability to improve indoor air quality, energy saving and environmental protection.