International Journal of Current Research and Review
ISSN: 2231-2196 (Print)ISSN: 0975-5241 (Online)
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IJCRR - Vol 03 Issue 08, August, 2011

Pages: 164-170

Date of Publication: 30-Nov--0001


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REFRIGERANTS PROGRESSION IN ANALYSIS OF TWO STAGE CASCADE REFRIGERATION SYSTEM -A REVIEW

Author: Devanshu Pyasi, R.C. Gupta

Category: Technology

Abstract:The objective of this paper is to provide a literature review on analysis of Cascade Refrigeration
Systems using various working fluids (refrigerants) and to give useful guidelines regarding
background and operating principles of Cascade System. The recent interest and development of
two-circuit cascade systems are highlighted and principal aspects of the environmental pollution
by working fluids in Cascade refrigeration systems are reported. Thus, paper discussed one of
the crucial point of refrigerants selection which makes these systems more efficient from both
economical and environmental point of view.

Keywords: refrigeration; cascade system; working fluids;

Full Text:

1.INTRODUCTION

Cascade refrigeration system is a low temperature refrigeration system and is used for very low temperature range about (-40C to - 130C).At such low temperature simple Vapor Compression Refrigeration Cycle (VCRS) is not efficient due to very high compression ratio that further leads to high discharge problem and low volumetric efficiencies. Whereas cascade refrigeration is much efficient for such conditions. Cascade refrigeration cycle is nothing but simply a combination of two (VCRS) cycles named as low and high temperature circuit that are combined together by a cascade condenser. This cascade condenser unit act as evaporator for low temperature circuit and condenser for high temperature circuit, the low temperature circuit uses low boiling refrigerants such as R23, R744 etc and high temperature uses high boiling point refrigerants such as R717, R290, R404A, R1270, R410A etc. Various refrigerants have been analyzed in cascade refrigeration system among which few are CO2/Ammonia, Propane/CO2, 507A/R23, 404a/CO2 etc. Generally, two-circuit and rarely three-circuit cascade systems are used for low temperature refrigeration In the present study a critical review is discussed about analysis of two stage cascade refrigeration system with refrigerants progression in low and high temperature circuit.

 

2. Background and Operation Principles Of Cascade System. Two stage cascade refrigeration system is a combination of two vapor compression cycles which utilizes two different refrigerants. These systems employ two circuits namely a high temperature circuit (HTC) and a low temperature circuit (LTC). The primary refrigerant flows from low temperature circuit evaporator to compressor and condensed in cascade condenser which also acts as evaporator for high temperature circuit. The heat rejected from condenser of low temperature circuit is extracted by evaporator of high temperature circuit containing secondary refrigerant then this refrigerant get compressed in high stage compressor and finally condensed to atmosphere. The desired refrigerating effect is occurred from evaporator of low temperature circuit. The heat absorbed by the evaporator of the (LTC) plus the work input to the (LTC) compressor equals the heat absorbed by the evaporator of the (HTC). The temperature difference in cascade condenser is an important design parameter that decides the COP of the entire system.

 

 

 

 

 

3. Working fluids: In this section, the criteria for working fluid (refrigerant) selection for the Cascade refrigeration systems are provided. The choice of the appropriate working fluid (refrigerant) is one of the most important parts in the design of the Cascade refrigeration system. A commonly used refrigerant pair in the past has been R12 and R13 for the high pressure and low-pressure stages respectively in cascade system. But these refrigerants are now banned due to presence of chlorine in it which is ozone depleting. So ecofriendly refrigerants are most suitable for industrial applications related to food preservation, such as in supermarkets, cold storages, blast freezing etc. According to he rules and regulations developed by Kyoto protocol only those refrigerants are now permitted in refrigeration industry which are environmental friendly and have low global warming potential and ozone depleting potential. Natural refrigerants such as two-stage ammonia, carbon dioxide and various Hfc blends are mostly used to cater these rules and regulations. (Fig 3) lists some commonly used working fluids for analyzing in cascade refrigeration system. The following requirements should be met by the fluid: 1) The fluid should have a large latent heat of vaporization in order to minimize circulation rate per unit of cooling capacity. 2) The fluid pressure at the generator temperature should not be too high in order to minimize the power required by compressor. 3) The fluid should be chemically stable, nontoxic, non-explosive, non-corrosive, environmental friendly and low cost.

 

4. Environmental Effect: Ozone Depletion Potential (ODP), Global Warming Potential(GWP): The effects of refrigerants on the environment are well documented. Industrial refrigeration contributes both directly and indirectly to global warming. leakage of HFC refrigerants causes green house gas emission that destructs environmental stability These refrigerants have very high global warming potential with GWP‘s in excess of 1000. Many working fluids suggested in previous work for cascade refrigeration systems are now forbidden due to their environmental effect, such as R12, R13, or R23. New refrigerants are now studied, for example, R404a, R744, R290, R1270 and R717 etc. [Table 1] shows properties of few refrigerants that are being used in cascade system currently.

 

Another advantage of the cascade refrigeration system is the possibility of using a wide range of refrigerants with the system. In experimental and theoretical studies on an cascade refrigeration system, various refrigerants such as CO2, ammonia, R12, R23,R13, R290 etc were selected as working fluid . High-temperature circuit of a cascade refrigeration system can normally be charged with ammonia (R717), propane (R290), propylene (R1270), ethanol or R404A, whereas carbon dioxide (R744) may be used in the low-temperature circuit of the refrigeration system. Ammonia is a naturally available refrigerant with few application constraints such as toxicity and flammability the disadvantage of propylene, propane and ethanol is their high flammability. Refrigerants in cascade cycles such as R12, R13, R404a, R134a, is a low-pressure refrigerant having high molecular weight; producing a high mass ratio, good cascade efficiency and high compressibility factor which is relatively close to an ideal gas.

5. Literature Review: A large number of experimental and analytical studies regarding development of Cascade refrigeration systems occurred with the two stage system type. Several test rigs have been built and tested. Initially CFC refrigerants were used but due to environmental consideration these refrigerants were banned, then HCFC refrigerants were used for few more time and were also restricted. Subsequently, more environmentally friendly refrigerants were suggested, e.g. natural refrigerants, hydrocarbon refrigerant as well as HFC refrigerants.

Bhattacharya et al [1]. Analyzed the theoretical performance of cascade refrigeration system. Further the system has also been numerically optimized to obtain the maximum coefficient of performance of the system. Two refrigerants (R744 and R290) were taken in two circuits of system. For the theoretical analysis Temperature approached (AT),Overlap Temperature, isentropic efficiency of compressor were taken as parameters and it was found that R744 in (HT) side and R290 in (LT) side can offer a much larger temperature lift. The overall performance of the cascaded system remains invariant with the effectiveness of the propane cycle and increases when effectiveness of the HT cycle is increased. These refrigerants R744 in high temperature circuit and R290 in low temperature circuit used for simultaneous heating and cooling applications. Shing Lee et al [2] analyzed a cascade refrigeration system using R717/R744 as refrigerants to determine the optimal condensing temperature of cascade condenser, to maximize the COP and minimize the Exergy destruction of the system. The parameters considered in this study are evaporator temperature, condensing temperature and temperature difference in cascade condenser. Analysis shows that optimal condensing temperature of cascade condenser increases with condenser temperature (TC), evaporator temperature (TE) & temperature difference in cascade condenser (DT). Also the maximum COP increases with (Te) ,but decreases as (Tc) & (DT) increases.

Getu and Bansal [3] Analyzed a carbon dioxide–ammonia (R744–R717) cascade system thermodynamically to determine the optimum condensing temperature of R744 in the lowtemperature circuit and mass flow ratio, to find out the system maximum COP in terms of sub cooling, superheating, evaporating temperature, condensing temperature and temperature difference in the system‘s cascade condenser. Result conclude an increase of superheat increased mass flow rate but reduces COP of system also an increase in sub cooling increased both COP and mass flow ratio.

 

A. D. Parekh et al [4] I reported the analysis of cascade refrigeration system has been carried out using ozone friendly refrigerants pair R507A and R23. Here R507a is a blend of HFC refrigerant composing different refrigerant mixtures. A thermodynamic analysis of cascade system has been carried to optimize the design and operating parameters of the system. Results concluded that COP of the system increased from 0.7851 to 1.232 as low temperature circuit evaporator temperature (TE, LT) is varied from - 80 C to -50 C.

 

A. D. Parekh et al [5] In this work the thermal design of condenser (HTS), cascade condenser and evaporator (LTS) of cascade refrigeration system has been carried out using two HFC refrigerant pairs R404A-R508B and R410AR23. Results shows that the required heattransfer area of condenser and cascade condenser for R410A-R23 cascade system is lower than the R404A-R508B cascade system but heat transfer area of evaporator is similar for both the system.

 

Russmann and Kruse [6] (2006) have performed analysis of cascade refrigerating systems using N2O as refrigerant for the low temperature cascade stage and various natural refrigerants like ammonia, propane, propylene, carbon dioxide and nitrous oxide itself for the high temperature stage the basis of the comparison was a conventional R23/R134acascade refrigerating system. This N2O system has nearly equal COP as a conventional R23/R134a-cascade refrigerating system

Dopazo et al [7]. They theoretically employed both exergy analysis and energy optimization, to determine the optimum condensing temperature of (R744) in the low-temperature circuit The analysis show that the COP increases 70% when the evaporator temperature (Tevap ) CO2 varies from (55 C to 30 C). As Tevap CO2 increases, the effect of other parameters on the COP also increases. COP diminishes 45% when the T Cond NH3 increases from (25C to 50 C) the exergetic efficiency decreases around 45% and 9% with the increases in condenser temperature (Tcond ) of NH3 and DT, respectively. Thus the CO2 evaporating temperature has to be as high as possible in order to obtain the highest COP and the NH3 condensing temperature has to be as low as possible to increase the COP to the maximum also for temperature differences in the cascade exchanger, and (DT) always show that for a lower (DT) a higher COP is obtained.

Dopazo et al [8] An Experimental evaluation of prototype of a cascade refrigeration system with CO2 and NH3 is done. Tests were performed fixing four CO2 evaporating temperatures (50, 45, 40 and 35 C). At each evaporating temperatures,(CO2) condensing temperature was varied from 17.5 to 7.5 C and an experimental optimum value of CO2 condensing temperature was determined. (Table 2) shows the validation results of experimental data with various theoretical analyses done by researchers.

 

A. D. Parekh et al [9] In present work the thermal design of condenser, cascade condenser and evaporator of R404A-R508B and R410A-R23 cascade refrigeration system is carried out. The comparison is made for heat transfer area of condenser (HTS), cascade condenser and evaporator (LTS) for both the systems. The effect of condenser and evaporator temperature on heat transfer area of condenser (HTS), cascade condenser and evaporator (LTS) are studied for both the systems 

G.Nicola et al [10] A comparison analysis was done between results obtained in different temperature and pressure conditions, firstly the system was operated using R23 in the low-temperature circuit, then replacing this fluid with the refrigerant binary system R744-R744A. Results conclude that, it is possible to use the binary system R744-R744A to solve problems of the pure R744. Cascade cycle stability with blends of R744 would seem an attractive option for future tests.

Souvik Bhattacharyya, S. Bose, et al. [11] In this analysis two-stage cascade cycle has been performed and optimum intermediate temperature for maximum exergy have been found analytically. Results showed that at low values of Th simulation follows the theoretical plots, but at higher temperatures large deviation occurs and unexpectedly high exergy rate is obtained due to drastic variation in supercritical CO2 properties.

Alhamid et al [12] The thermodynamic energy and exergy analysis was conducted by taking propane as high circuit refrigerant and a mixture of CO2+N2O also known as ethane mixture were taken as low circuit refrigerant. a multi liner regression analysis was conducted to optimize various performance parameters such as COP, Optimum evaporating and condensing temperatures.

 

6. CONCLUSION

This paper describes a basic background and development on analysis of cascade refrigeration system with various refrigerants and optimizations conducted for such refrigerants. Large number of refrigerants has been analyzed in cascade system for determining the appropriate combination of refrigerants in both circuits of refrigerants however the trends shows natural refrigerants are gaining more importance due to environmental conditions few natural refrigerants such as ammonia, co2 are analyzed but there is still shortcomings in analysis of eco friendly refrigerants. Refrigerants including blends of natural refrigerants, Hfc refrigerants can be more widely adopted to fill this gap also the analysis process can involve more design and operating parameters such as effect of sub cooling and superheating should also be taken in account.

 

 

 

 

References:

1. Montreal protocol on substances that deplete the ozone layer. United Nations Environment programme (UNEP), (1987).

2. Stegmann, R. (2000), ?Low temperature refrigeration?. ASHRAE Journal 42(1), pp. 42–50.

3. Taylor, R. (2001), ?Carbon dioxidebased refrigerant systems?, ASHRAE Journal, pp. 22–27.

4. Taylor, R. (2001), ?Carbon dioxidebased refrigerant systems?, ASHRAE Journal, pp. 22–27.

5. Arora, C.P. (2002), ?Refrigeration and Air conditioning?, 2nd edition, Tata McGraw Hill, New Delhi.

6. Bhattacharyya, S., Mukhopadhyay. et al. (2005).Optimization of a CO2–C3H8 cascade system for refrigeration and heating. Int. J. Refrigeration 28, 1284– 1292.]

7. Wilson, I., Maier, D. (2006), ?Carbon dioxide for use as a refrigerant?, The University of Auckland.

8. T. Lee, C. Liu, T. Chen, Thermodynamic analysis of optimal condensing temperature of cascade– condenser in CO2/NH3 cascade refrigeration systems, International Journal of Refrigeration 29 (2006) 1100–1108

9. Bansal, P.K., Jain, S, (2007) Cascade systems: past, present, and future. ASHRAE Trans. 113 (1), 245–252

10. G. D .Nicola et al (2007) Cascade cycles operating with co2+n2o binary system as low temperature fluid ICR07-B2- 1293

11. Getu,H., Bansal, P., (2008). Thermodynamic analysis of an R744- R717 cascade refrigeration system. Int. J. Refrigeration.

12. Dopazo, J.A., Fernandez-Seara, et al. (2008). Theoretical analysis of a CO2eNH3 cascade refrigeration system for cooling applications at low temperatures. Appl. Thermal. Eng.

13. J. Alberto Dopazo et al (2010).Experimental evaluation of a cascade refrigeration system prototype with CO2 and NH3 for freezing process applications

14. A. D. Parekh and P. R. Tailor Thermodynamic Analysis of R507AR23 Cascade Refrigeration System. International Journal of Aerospace and Mechanical Engineering 6:1 2012

15. A. D. Parekh and P. R. Tailor Numerical Simulation of Heat Exchanger Area of R410A-R23 and R404A-R508B Cascade Refrigeration System at Various Evaporating and Condensing Temperature

16. A. D. Parekh and P. R. Tailor et al. Numerical Simulation of R410a-R23 and R404A-R508B Cascade Refrigeration System World Academy of Science, Engineering and Technology 70 2010

17. Souvik Bhattacharyya, S. Bose et al. Exergy maximization of cascade refrigeration cycles and its numerical verification for a transcritical CO2- C3H8 system

18. Getu, H.M., Bansal, P.K. Modeling and performance analysis of evaporators in frozen food supermarket display cabinets at low temperatures.

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Awards, Research and Publication incentive Schemes by IJCRR

Best Article Award: 

One article from every issue is selected for the ‘Best Article Award’. Authors of selected ‘Best Article’ are rewarded with a certificate. IJCRR Editorial Board members select one ‘Best Article’ from the published issue based on originality, novelty, social usefulness of the work. The corresponding author of selected ‘Best Article Award’ is communicated and information of award is displayed on IJCRR’s website. Drop a mail to editor@ijcrr.com for more details.

Women Researcher Award:

This award is instituted to encourage women researchers to publish her work in IJCRR. Women researcher, who intends to publish her research work in IJCRR as the first author is eligible to apply for this award. Editorial Board members decide on the selection of women researchers based on the originality, novelty, and social contribution of the research work. The corresponding author of the selected manuscript is communicated and information is displayed on IJCRR’s website. Under this award selected women, the author is eligible for publication incentives. Drop a mail to editor@ijcrr.com for more details.

Emerging Researcher Award:

‘Emerging Researcher Award’ is instituted to encourage student researchers to publish their work in IJCRR. Student researchers, who intend to publish their research or review work in IJCRR as the first author are eligible to apply for this award. Editorial Board members decide on the selection of student researchers for the said award based on originality, novelty, and social applicability of the research work. Under this award selected student researcher is eligible for publication incentives. Drop a mail to editor@ijcrr.com for more details.


Best Article Award

A Study by Amr Y. Zakaria et al. entitled "Single Nucleotide Polymorphisms of ATP-Binding Cassette Gene(ABCC3 rs4793665) affect High Dose Methotrexate-Induced Nephrotoxicity in Children with Osteosarcoma" is awarded Best Article for Vol 13 issue 19
A Study by Kholis Ernawati et al. entitled "The Utilization of Mobile-Based Information Technology in the Management of Dengue Fever in the Community Year 2019-2020: Systematic Review" is awarded Best Article for Vol 13 issue 18
A Study by Bhat Asifa et al. entitled "Efficacy of Modified Carbapenem Inactivation Method for Carbapenemase Detection and Comparative Evaluation with Polymerase Chain Reaction for the Identification of Carbapenemase Producing Klebsiella pneumonia Isolates" is awarded Best Article for Vol 13 issue 17
A Study by Gupta R. et al. entitled "A Clinical Study of Paediatric Tracheostomy: Our Experience in a Tertiary Care Hospital in North India" is awarded Best Article for Vol 13 issue 16
A Study by Chandran Anand et al. entitled "A Prospective Study on Assessment of Quality of Life of Patients Receiving Sorafenib for Hepatocellular Carcinoma" is awarded Best article for Vol 13 issue 15
A Study by Rosa PS et al. entitled "Emotional State Due to the Covid – 19 Pandemic in People Residing in a Vulnerable Area in North Lima" is awarded Best Article for Vol 13 issue 14
A Study by Suvarna Sunder J et al. entitled "Endodontic Revascularization of Necrotic Permanent Anterior Tooth with Platelet Rich Fibrin, Platelet Rich Plasma, and Blood Clot - A Comparative Study" is awarded Best Article for Vol 13 issue 13
A Study by Mona Isam Eldin Osman et al. entitled "Psychological Impact and Risk Factors of Sexual Abuse on Sudanese Children in Khartoum State" is awarded Best Article for Vol 13 issue 12
A Study by Khaw Ming Sheng & Sathiapriya Ramiah entitled "Web Based Suicide Prevention Application for Patients Suffering from Depression" is awarded Best Article for Vol 13 issue 11
A Study by Purushottam S. G. et al. entitled "Development of Fenofibrate Solid Dispersions for the Plausible Aqueous Solubility Augmentation of this BCS Class-II Drug" is awarded Best article for Vol 13 issue 10
A Study by Kumar S. et al. entitled "A Study on Clinical Spectrum, Laboratory Profile, Complications and Outcome of Pediatric Scrub Typhus Patients Admitted to an Intensive Care Unit from a Tertiary Care Hospital from Eastern India" is awarded Best Article for Vol 13 issue 09
A Study by Mardhiah Kamaruddin et al. entitled "The Pattern of Creatinine Clearance in Gestational and Chronic Hypertension Women from the Third Trimester to 12 Weeks Postpartum" is awarded Best Article for Vol 13 issue 08
A Study by Sarmila G. B. et al. entitled "Study to Compare the Efficacy of Orally Administered Melatonin and Clonidine for Attenuation of Hemodynamic Response During Laryngoscopy and Endotracheal Intubation in Gastrointestinal Surgeries" is awarded Best Article for Vol 13 issue 07
A Study by M. Muthu Uma Maheswari et al. entitled "A Study on C-reactive Protein and Liver Function Tests in Laboratory RT-PCR Positive Covid-19 Patients in a Tertiary Care Centre – A Retrospective Study" is awarded Best Article of Vol 13 issue 06 Special issue Modern approaches for diagnosis of COVID-19 and current status of awareness
A Study by Gainneos PD et al. entitled "A Comparative Evaluation of the Levels of Salivary IgA in HIV Affected Children and the Children of the General Population within the Age Group of 9 – 12 Years – A Cross-Sectional Study" is awarded Best Article of Vol 13 issue 05 Special issue on Recent Advances in Dentistry for better Oral Health
A Study by Alkhansa Mahmoud et al. entitled "mRNA Expression of Somatostatin Receptors (1-5) in MCF7 and MDA-MB231 Breast Cancer Cells" is awarded Best Article of Vol 13 issue 06
A Study by Chen YY and Ghazali SRB entitled "Lifetime Trauma, posttraumatic stress disorder Symptoms and Early Adolescence Risk Factors for Poor Physical Health Outcome Among Malaysian Adolescents" is awarded Best Article of Vol 13 issue 04 Special issue on Current Updates in Plant Biology to Medicine to Healthcare Awareness in Malaysia
A Study by Kumari PM et al. entitled "Study to Evaluate the Adverse Drug Reactions in a Tertiary Care Teaching Hospital in Tamilnadu - A Cross-Sectional Study" is awarded Best Article for Vol 13 issue 05
A Study by Anu et al. entitled "Effectiveness of Cytological Scoring Systems for Evaluation of Breast Lesion Cytology with its Histopathological Correlation" is awarded Best Article of Vol 13 issue 04
A Study by Sharipov R. Kh. et al. entitled "Interaction of Correction of Lipid Peroxidation Disorders with Oxibral" is awarded Best Article of Vol 13 issue 03
A Study by Tarek Elwakil et al. entitled "Led Light Photobiomodulation Effect on Wound Healing Combined with Phenytoin in Mice Model" is awarded Best Article of Vol 13 issue 02
A Study by Mohita Ray et al. entitled "Accuracy of Intra-Operative Frozen Section Consultation of Gastrointestinal Biopsy Samples in Correlation with the Final Histopathological Diagnosis" is awarded Best Article for Vol 13 issue 01
A Study by Badritdinova MN et al. entitled "Peculiarities of a Pain in Patients with Ischemic Heart Disease in the Presence of Individual Combines of the Metabolic Syndrome" is awarded Best Article for Vol 12 issue 24
A Study by Sindhu Priya E S et al. entitled "Neuroprotective activity of Pyrazolone Derivatives Against Paraquat-induced Oxidative Stress and Locomotor Impairment in Drosophila melanogaster" is awarded Best Article for Vol 12 issue 23
A Study by Habiba Suhail et al. entitled "Effect of Majoon Murmakki in Dysmenorrhoea (Usre Tams): A Standard Controlled Clinical Study" is awarded Best Article for Vol 12 issue 22
A Study by Ghaffar UB et al. entitled "Correlation between Height and Foot Length in Saudi Population in Majmaah, Saudi Arabia" is awarded Best Article for Vol 12 issue 21
A Study by Leow Jun Xian and Siti Sarah Binti Maidin entitled "Sleep Well: Mobile Application to Address Sleeping Problems" is awarded Best Article for Vol 12 issue 20
A Study by Avijit Singh et al. entitled "Comparison of Post Operative Clinical Outcomes Between “Made in India” TTK Chitra Mechanical Heart Valve Versus St Jude Mechanical Heart Valve in Valve Replacement Surgery" is awarded Best Article for Vol 12 issue 19
A Study by Sonali Banerjee and Mary Mathews N. entitled "Exploring Quality of Life and Perceived Experiences Among Couples Undergoing Fertility Treatment in Western India: A Mixed Methodology" is awarded Best Article for Vol 12 issue 18
A Study by Jabbar Desai et al. entitled "Prevalence of Obstructive Airway Disease in Patients with Ischemic Heart Disease and Hypertension" is awarded Best Article for Vol 12 issue 17
A Study by Juna Byun et al. entitled "Study on Difference in Coronavirus-19 Related Anxiety between Face-to-face and Non-face-to-face Classes among University Students in South Korea" is awarded Best Article for Vol 12 issue 16
A Study by Sudha Ramachandra & Vinay Chavan entitled "Enhanced-Hybrid-Age Layered Population Structure (E-Hybrid-ALPS): A Genetic Algorithm with Adaptive Crossover for Molecular Docking Studies of Drug Discovery Process" is awarded Best article for Vol 12 issue 15
A Study by Varsha M. Shindhe et al. entitled "A Study on Effect of Smokeless Tobacco on Pulmonary Function Tests in Class IV Workers of USM-KLE (Universiti Sains Malaysia-Karnataka Lingayat Education Society) International Medical Programme, Belagavi" is awarded Best article of Vol 12 issue 14, July 2020
A study by Amruta Choudhary et al. entitled "Family Planning Knowledge, Attitude and Practice Among Women of Reproductive Age from Rural Area of Central India" is awarded Best Article for special issue "Modern Therapeutics Applications"
A study by Raunak Das entitled "Study of Cardiovascular Dysfunctions in Interstitial Lung Diseas epatients by Correlating the Levels of Serum NT PRO BNP and Microalbuminuria (Biomarkers of Cardiovascular Dysfunction) with Echocardiographic, Bronchoscopic and HighResolution Computed Tomography Findings of These ILD Patients" is awarded Best Article of Vol 12 issue 13 
A Study by Kannamani Ramasamy et al. entitled "COVID-19 Situation at Chennai City – Forecasting for the Better Pandemic Management" is awarded best article for  Vol 12 issue 12
A Study by Muhammet Lutfi SELCUK and Fatma COLAKOGLU entitled "Distinction of Gray and White Matter for Some Histological Staining Methods in New Zealand Rabbit's Brain" is awarded best article for  Vol 12 issue 11
A Study by Anamul Haq et al. entitled "Etiology of Abnormal Uterine Bleeding in Adolescents – Emphasis Upon Polycystic Ovarian Syndrome" is awarded best article for  Vol 12 issue 10
A Study by Arpita M. et al entitled "Estimation of Reference Interval of Serum Progesterone During Three Trimesters of Normal Pregnancy in a Tertiary Care Hospital of Kolkata" is awarded best article for  Vol 12 issue 09
A Study by Ilona Gracie De Souza & Pavan Kumar G. entitled "Effect of Releasing Myofascial Chain in Patients with Patellofemoral Pain Syndrome - A Randomized Clinical Trial" is awarded best article for  Vol 12 issue 08
A Study by Virendra Atam et. al. entitled "Clinical Profile and Short - Term Mortality Predictors in Acute Stroke with Emphasis on Stress Hyperglycemia and THRIVE Score : An Observational Study" is awarded best article for  Vol 12 issue 07
A Study by K. Krupashree et. al. entitled "Protective Effects of Picrorhizakurroa Against Fumonisin B1 Induced Hepatotoxicity in Mice" is awarded best article for issue Vol 10 issue 20
A study by Mithun K.P. et al "Larvicidal Activity of Crude Solanum Nigrum Leaf and Berries Extract Against Dengue Vector-Aedesaegypti" is awarded Best Article for Vol 10 issue 14 of IJCRR
A study by Asha Menon "Women in Child Care and Early Education: Truly Nontraditional Work" is awarded Best Article for Vol 10 issue 13
A study by Deep J. M. "Prevalence of Molar-Incisor Hypomineralization in 7-13 Years Old Children of Biratnagar, Nepal: A Cross Sectional Study" is awarded Best Article for Vol 10 issue 11 of IJCRR
A review by Chitra et al to analyse relation between Obesity and Type 2 diabetes is awarded 'Best Article' for Vol 10 issue 10 by IJCRR. 
A study by Karanpreet et al "Pregnancy Induced Hypertension: A Study on Its Multisystem Involvement" is given Best Paper Award for Vol 10 issue 09
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List of Awardees

A Study by Ese Anibor et al. entitled "Evaluation of Temporomandibular Joint Disorders Among Delta State University Students in Abraka, Nigeria" from Vol 13 issue 16 received Emerging Researcher Award


A Study by Alkhansa Mahmoud et al. entitled "mRNA Expression of Somatostatin Receptors (1-5) in MCF7 and MDA-MB231 Breast Cancer Cells" from Vol 13 issue 06 received Emerging Researcher Award


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