Journal International Academy of Refrigeration最新文献

{"title":"Experimental study of thermodynamic efficiency of the absorption refrigeration machine and heat pump complex","authors":"E. V. Mereutsa, A. A. Sukhikh","doi":"10.17586/1606-4313-2019-18-3-23-28","DOIUrl":"https://doi.org/10.17586/1606-4313-2019-18-3-23-28","url":null,"abstract":"","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121827888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On evaporative cooling of compressor","authors":"M. S. Dzitoev, Y. Tatarenko, А.V. Моlоsтоv","doi":"10.17586/1606-4313-2021-20-2-21-27","DOIUrl":"https://doi.org/10.17586/1606-4313-2021-20-2-21-27","url":null,"abstract":"The paper considers the perspectives of cooling the working fluid in a volumetric compressor by injecting liquid into gas. The results of numerical analysis for the operation of the stage of a linear‑driven reciprocating compressor using KOMDET‑VKA software at different pressure ratios in the stage are presented. For evaporative cooling, it is proposed to use a mixture of air with nitrogen, helium, and argon. These agents are used in the gas supply systems of space rockets. The expediency of using evaporative cooling by injecting liquid into the suction cavity of the working substance in a reciprocating compressor is shown. It allows reducing the compression work and gas injection temperature as well as increasing increase its productivity.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"32 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113942741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The study of y+ influence on the results of nozzle flow numerical simulation in the centrifugal compressor inlet chamber","authors":"L. Gileva, A. Aksenov, Y. Kozhukhov, A. Petrov","doi":"10.17586/1606-4313-2020-19-1-27-33","DOIUrl":"https://doi.org/10.17586/1606-4313-2020-19-1-27-33","url":null,"abstract":"The efficiency of compressor machines for refrigeration needs is characterized by the efficiency coefficent. Increasing the efficiency of the stage is necessary, especially for centrifugal compressor machines. In this paper, the study of the centrifugal compressor inlet radial chamber, which directly affects the efficiency of the entire stage, is carried out. A mathematical model has been selected for conducting a numerical experiment with its subsequent validation with a full-scale experiment. The selection of the mathematical model included grid independence study, boundary conditions selection, and the study of the y + wall function influence for a specific turbulence model. y + is an important factor in numerical experiments, and its incorrect choice can lead to a non-physical flow pattern. There are certain recommendations for the y + value for different turbulence models. However, as this study is shown, the existing recommendations are not universal for different centrifugal compressors flow parts. Recommendations on the value of the y + parameter for inlet chambers with different nozzle values at different Reynolds number values are investigated and given in this paper. To determine the losses dependence function form on the average y + value, the results of calculations are summarized in separate graphs and approximated by separate functions. Approximation dependence is obtained based on the numerical experiment results of the average y + value influence, the chamber nozzle coefficient and the Reynolds number on the losses of the inlet radial chamber. The obtained dependence was used to determine the optimal value of y + mean and the wall layer for experimental studies of chambers. The results of the numerical experiment are compared with the results of the full-scale experiment and experimental dependences are obtained. The results obtained will simplify further work on modeling the inlet radial chambers.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131168426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of low-tonnage LNG production technologies with nitrogen circulation cycle","authors":"R. Sanavbarov, A. V. Zaitsev, F. Shermatova","doi":"10.17586/1606-4313-2023-22-1-55-65","DOIUrl":"https://doi.org/10.17586/1606-4313-2023-22-1-55-65","url":null,"abstract":"","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134147885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cooling infinite rectangular plate with adiabatically isolated side wall under boundary conditions of the third kind","authors":"A. Kanareykin","doi":"10.17586/1606-4313-2022-21-3-74-79","DOIUrl":"https://doi.org/10.17586/1606-4313-2022-21-3-74-79","url":null,"abstract":"","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133805185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative analysis of methods for calculating heat transfer process in the compressor stages of volumetric operating principle","authors":"I. K. Prilutskiy, J. Molodova, I. Tatarenko","doi":"10.17586/1606-4313-2022-21-4-15-20","DOIUrl":"https://doi.org/10.17586/1606-4313-2022-21-4-15-20","url":null,"abstract":"","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114233760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Implementation of the HACCP tool and microbiological quality of agbelima production on a site in South Benin","authors":"M. A. D. Tchibozo, Romaine CAPO-CHICHI, Antoinette Adjagodo, E. Ladekan, T. Guidi, Larissa V. Galimova","doi":"10.17586/1606-4313-2021-20-3-45-56","DOIUrl":"https://doi.org/10.17586/1606-4313-2021-20-3-45-56","url":null,"abstract":"The Hazard Analysis and Critical Control Point system (HACCP) is a scientific and systematic approach to identify hazards and provide measures for their control to ensure food safety. Thus, to ensure that the quality of agbélima, a product derived from cassava is taken into consideration during processing, the HACCP system has been applied to improve both the quality and the safety of that product. The methodology used for the implementation of the quality approach on the chain of production of agbelima in South Benin is summarized by a survey for the analysis of the context and the environment of agbelima production, the hazard analysis and the determination of the critical points related to the production of agbelima, the realization of the model of the quality assurance system (HACCP) and the verification of the effectiveness of the system implemented. The hazard analysis was carried out according to the raw, material, labor, equipment, environment and method. The elaboration of the HACCP theorical model was carried out according to twelve classic steps. The HACCP system is implemented on the production site. Before and after the implementation of the system, microbiological analysis on eighteen samples of agbelima were carried out. The results of the hazard analysis indicate that hazards exist at all stages of agbelima production. The application of the HACCP theorical model resulted in the detection of 6 Critical Control Points (CCPs) throughout the production chain. These are the reception of the raw material, washing, grinding, pressing, fine milling, and packaging. The analysis reveals that all eighteen samples of agbelima analysed before the implementation of the approach are not in conformity with the regulatory requirements. However, after the application of the system, a varying reduction from 93.49 % to 100 % was noted for microorganisms such as: Total Mesophilic Flora, Lactic Flora, Yeasts and Moulds and Sulfito Reducing Anaerobes, ColiformsThermotolerant, E. coli, Staphylococci and Salmonella in agbelima samples. Compliance with the implementation guide is 77.5 % in relation to twelve steps of the system application. Improvements are needed on the records and their effective updating to maintain the level of quality of this product.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116596721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the cut-off angle for the wraps of scroll compressors. An analytical approach","authors":"V. A. Kosachevsky","doi":"10.17586/1606-4313-2020-19-2-26-30","DOIUrl":"https://doi.org/10.17586/1606-4313-2020-19-2-26-30","url":null,"abstract":"The article analyzes different approaches to the modelling of scroll compressor central part. They are compared in terms of different operation principles used for scroll machines. The schemes of spiral cut-off are analyzed. The concept minimal critical angle for spiral cut-off is introduced and substantiated. The technique of the angle estimation, based on the equations for intrados of scroll machine working tool, is suggested. The relevance of correct estimation for the lower boundary of the cut-off angle for wraps in scroll machines designing is emphasized. The technique described is suggested for the purpose.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123157102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Obtaining and using smoked composition based on the extracts of Fur-cellaria Lumbricalis red seaweed","authors":"A. Sushina, O. Mezenova","doi":"10.17586/1606-4313-2022-21-1-53-60","DOIUrl":"https://doi.org/10.17586/1606-4313-2022-21-1-53-60","url":null,"abstract":"","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123316447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Developing a scheme for the utilization system of condensation heat from refrigerating machines to decrease the dependency of ice arena on municipal systems of heating and hot water supply","authors":"I. A. Korotkiy, E. Neverov, P. Korotkikh, V. G. Lonshakov, Success","doi":"10.17586/1606-4313-2021-20-1-34-39","DOIUrl":"https://doi.org/10.17586/1606-4313-2021-20-1-34-39","url":null,"abstract":"The article presents the results of developing a system for utilization of condensation heat from refrigerating units and air-conditioning systems of ice fields to decrease the dependency of engineering and technical systems of the objects on municipal systems of heating and hot water supply. The proposed solution provides saving of heat and electric energy consumed by both the refrigeration supply system and other systems of the object. When compressed gas overheating is used, an addition heat exchanger is added to the revegetating circuit allowing to utilize up to 20 % of heat released by the unit. As the temperature of refrigerating medium may be above 100 °C in the end of compression process, the environment (water or air) is heated up to 80–90 °C. The technology has been developed for Small Ice Hockey Arena and Ice Hockey Training Rink in Sochi Olympic Park. The IIR conference series on Sustainability and the Cold Chain is recognised as a cutting-edge event on the cold chain which addresses the ever-increasing demand for knowledge-sharing in this essential sector. This prestigious biennial conference attracts international audiences of researchers and industrialists, providing an opportunity to showcase the latest developments in sustainability, retail refrigeration and the cold chain.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122704740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}