Journal International Academy of Refrigeration最新文献

{"title":"Identification of the kinetic regularities of ectocarpus dehydration under convective supply of thermal energy","authors":"E.Yu. Zaporozhec, E.V. Fomenko, A.H.-H. Nugmanov, I. Alexanyan, A.V. Kotelnikov, Wo Chung Kuang","doi":"10.17586/1606-4313-2023-22-2-68-74","DOIUrl":"https://doi.org/10.17586/1606-4313-2023-22-2-68-74","url":null,"abstract":"","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"26 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":"124272406","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":"Assessment of apricots suitability for shock freezing according to physical and technological quality indicators","authors":"B. Guseynova, I. Asabutaev, T. Daudova","doi":"10.17586/1606-4313-2021-20-1-74-83","DOIUrl":"https://doi.org/10.17586/1606-4313-2021-20-1-74-83","url":null,"abstract":"fruit from the weight of the frozen fruit. The sensory characteristic of apricots was given on a five-point scale. The greatest losses of their juice were caused by slow freezing (t = –25 °C), and the minimum — fast (t = –35 °C). The losses of juice also changed depending on the initial temperature of fresh fruits (t = 0, 5, 16 and 22 °C) before low-temperature exposure. At all temperature modes of shock freezing, the lowest juice yield was observed when the temperature of fresh fruits was adjusted to 0 ° C before freezing. The losses of juice of fruits during defrosting increased with increasing shelf life. By the end of the nine-month storage (t = –18 °C), the apricots Uncukulskiy pozdniy, Shalah and Krasnoshcheky are classified as «good,» and Uzden and Honobah are «satisfactory.» Good tasting ratings — 4.2; 4.1 and 4.1 points, received apricots Shalah, Uncukulskiy pozdniy and Krasnoshcheky, respectively. They turned out to be the best in terms of physicochemical indicators. The yield of defective fruits after nine months of storage (t = –18 °C) was 90.0 % (Uncukulskiy pozdniy, 92.6 % (Shalah). The use of microwave treatment of apricots has proved to be a more efficient method of defrosting these fruits compared to traditional defrosting in air and water.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"29 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113975764","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":"Improving performance characteristics of mobile low power heating blocks","authors":"N. Yermoshin, A. S. Mokrushin, Y. Kashtanov","doi":"10.17586/1606-4313-2021-20-2-45-49","DOIUrl":"https://doi.org/10.17586/1606-4313-2021-20-2-45-49","url":null,"abstract":"Предложен комплекс технических и технологических решений модификации технических средств пищевых производств. Модификация предусматривает конструктивные изменения тепловых блоков мобильных комплексов приготовления пищи. Целью конструктивных изменений малолитражных тепловых блоков является повышение их универсальности для приготовления горячей пищи, кипячения воды и подогрева консервированных блюд на всех видах топлива (твердое, жидкое, газообразное), включая топливо с низкой теплотворной способностью (щепа, солома, мох и др.). Конструкция обеспечивает повышение эффективности использования топлива за счет эффекта дожига отработанных газов. Отличительная особенность предлагаемых технических и технологических решений заключается в обосновании конструктивных элементов мобильного средства приготовления пищи, обеспечивающего повышение функциональных возможностей по приготовлению пищи при минимальной теплотворной способности топлива за счет снижения теплопотерь и теплопроводности стенок корпуса, увеличения теплоотдачи сгораемого топлива и реализации метода пиролизного горения твердого топлива. Разработанные конструктивные элементы тепловых блоков обеспечивают их мобильность, надежность работы в условиях сильных морозов, ветров, разреженного воздуха; экономию расхода энергоресурсов; эффективность работы на любом виде топлива, в том числе с малой теплотой сгорания; снижение временных затрат на приготовление пищи и техническое обслуживание; уменьшение теплопотерь внутри корпуса за счет теплоизолирующих свойств и частичного отражения излучения продуктов сгорания от керамического покрытия на стенках корпуса. Ключевые слова: конструктивное изменение, тепловой блок, теплоотдача, пиролизное горение, малолитражная кухня.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"104 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114120386","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":"Selection of cryogenic tanks for modernization of small-scale LNG carriers","authors":"L. Ivanov, A. Baranov, T. A. Malysheva, A. M. Andreev, Production Enterprise “Krion”, Stc “Sintez”","doi":"10.17586/1606-4313-2021-20-1-40-45","DOIUrl":"https://doi.org/10.17586/1606-4313-2021-20-1-40-45","url":null,"abstract":"The article examines the existing ship systems of food and fuel tanks. When designing new or renovating existing LNG carriers, it is necessary to solve the problem of choosing the type of cryogenic tanks. Cryogenic tanks of small-scale volume differ significantly from cryogenic tanks of ocean tankers in size, design solutions and operating mode. The task of forming a fleet of inland and coastal LNG carriers is extremely relevant for the Russian Federation due to its low population density, underdeveloped road network, and the remoteness of settlements from natural gas sources. Taking into account the scale of the problem, the most attractive option for production of such vessels from an investment point of view is the modernization of out-of-date oil tankers. With such modernization, it is necessary to replace the product tanks for diesel fuel with cryogenic tanks. It is necessary to maximize the use of the cargo capacity and volume of the ship hold space as well as to ensure satisfactory rates of LNG losses from evaporation.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"26 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":"114648248","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":"Mathematical simulation of effective resistance forces during cutting of chilled food products","authors":"O. V. Ageev, V. Naumov, J. A. Fatykhov","doi":"10.17586/1606-4313-2020-19-3-70-82","DOIUrl":"https://doi.org/10.17586/1606-4313-2020-19-3-70-82","url":null,"abstract":"The relevance of the research of the cutting process of chilled food products has been shown. The muscle tissue of the chilled raw material has been described by the Maxwell-Thomson rheological model. The formulation and solution of the problem of mathematical modeling of the effective resistances forces have been completed. The muscle filaments of the product during cutting are interpreted as viscoelastic beams. The bending and tensile strains of the filaments under the influence of the knifepoint have been considered. Expressions for the dimensional and dimensionless forces of effective resistance have been obtained. The dependences of the indicated forces on the cutting edge sharpness, the half angle of knife sharpening, the rheological parameters of the material, the design parameters of the cutting body, and the operating characteristics of the cutting process have been investigated. It is shown that the nature of the dependence of the effective resistance forces on the blade sharpness is determined by the rheological state of the chilled raw material due to a change in the type of fiber deformation upon destruction. With the values of dimensionless sharpness of the knife 0.2; dimensionless cutting speed 5; measures of elasticity 5; dimensionless immersion depth of the knife 1; dimensionless half the width of the deformable layer of 0.4; dimensionless layer thickness 0.01; half angle of knife sharpening 5º; 25º; 35º; 45º, the value of the dimensionless effective resistance force is 4.91; 4.49; 3.88; and 3.07, respectively. With the values of dimensionless sharpness of the knife 0.2; half angle of knife sharpening 20º; dimensionless cutting speed 5; dimensionless immersion depth of the knife 1; dimensionless half the width of the deformable layer of 0.4; dimensionless layer thickness 0.01; elasticity measures 3; 5; 8; 12, the dimensionless force value is 3.16; 4.70; 7.91; and 10.09, respectively. resistance force on the dimensionless sharpness of the knife and the half angle of sharpening","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":"115912129","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":"Heat and mass transfer during film flow around ice surfaces with a phase transition at the interface","authors":"G. Goncharova, V. P. Pytchenko, S. Borzov, G. V. Borschev","doi":"10.17586/1606-4313-2021-20-4-3-11","DOIUrl":"https://doi.org/10.17586/1606-4313-2021-20-4-3-11","url":null,"abstract":"of a film flow process around ice surfaces in ice banks with a phase transition at the interface. Experimental studies were carried out for an ice bank with flat coils and its single section. The experiments were carried out at three temperature levels of cooled water: 20, 40, and 60 °C in the range of volumetric irrigation densities from 0.1 ∙ 10 –4 m 2 /s to 1.5∙10 –4 m 2 /s. It has been established that, at the specified parameters, the output specific heat load of the ice bank with a film heat exchange mechanism reaches up to 320 000 W/m 2 . On average, this value is an order of magnitude higher than similar values for modern plate heat exchangers from leading manufacturers (Alfa Laval, Funke, and Ridan), and more than two orders of magnitude higher than in ice banks with ice melting in a large volume. In the specified range, the values of the heat transfer coefficient, reduced to the surface of the heat exchanger, reached ~ 22.000 W/ (m 2 ∙K), which significantly exceeds the analogous value for volumetric melting ice banks (300–500 W/ (m 2 ∙K)). It is shown that in heat exchangers with a film flow, the initial temperature gradient between the cooled water and the ice surface affects the heat transfer coefficient indirectly (through the Reynolds number of the falling film), in contrast to heat exchangers with a fixed heat transfer surface. The generalization of the results showed the prospects of using ice banks with a film heat and mass transfer mechanism for food industry objects with an uneven distribution of heat load and for maintaining the temperature of refrigerated products. In addition, they can be effectively used in systems with a pulsed nature of heat release (cooling lasers, etc.), as well as daily storage devices in conjunction with «green» power supply systems using solar and wind energy.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"63 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120811906","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":"Experimental study of a cryogenic evaporative cooling system","authors":"D. V. Sarmin, V.M. Borovik, E. Blagin, A.L. Lopatin","doi":"10.17586/1606-4313-2023-22-2-26-33","DOIUrl":"https://doi.org/10.17586/1606-4313-2023-22-2-26-33","url":null,"abstract":"","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"139 S260","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120853318","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":"Heat transfer in low-grade energetics","authors":"A. A. Dzino, O. Malinina","doi":"10.17586/1606-4313-2019-18-1-29-33","DOIUrl":"https://doi.org/10.17586/1606-4313-2019-18-1-29-33","url":null,"abstract":"Трансформация теплоты с одного температурного уровня на другой может осуществляться: с целью выработки холода; с целью понижения температуры высокопотенциального источника на более низкий температурный уровень для конкретной технологии, например, для системы отопления и горячего водоснабжения; с целью повышения температуры низкопотенциального источника на более высокий температурный уровень. В работе выполнено исследование влияния степени внутренней регенерации теплоты на энергетическую эффективность циклов абсорбционного бромистолитиевого понижающего термотрансформатора, абсорбционной бромистолитиевой холодильной машины и абсорбционного бромистолитиевого повышающего термотрансформатора в зависимости от температуры греющего источника. Ключевые слова: трансформация теплоты, система циклов, холодильная машина, термотрансформаторы, коэффициенты энергетической эффективности циклов, температура греющего источника.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"9 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":"117339013","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":"Pastille technology designed to maintain the functions of cardiovascular system","authors":"E.A. Bystrevskaya, E. Zemlyakova","doi":"10.17586/1606-4313-2021-20-4-38-44","DOIUrl":"https://doi.org/10.17586/1606-4313-2021-20-4-38-44","url":null,"abstract":"This article presents the results of research on the technology of a two-layer pastille designed to maintain the functions of the human cardiovascular system. In the work, the following raw materials were considered: pumpkin (Cucurbita pepo L.) and cranberries (Vaccinium vitis-idaea L.) (first layer of marshmallow) and apples of the Granny Smith variety (second layer). For dusting a sprinkling of powdered sugar and cranberry powder was proposed; in order to reduce the amount of sugar it was proposed to use a mixture of powdered sugar and cranberry powder in a ratio of 6: 1, respectively. In the pastel mass itself there is no additionally introduced sugar. When carrying out research, the work used standard and generally accepted physicochemical and organoleptic research methods, as well as methods of mathematical modeling. The marketing research of consumers’ preferences in the field of sugary confectionery products was carried out by a survey method according to the developed questionnaire. The study involved 200 people. The results indicate that the respondents are interested in a new product with a low sugar content and functional properties, which are manifested in maintaining the efficiency of the cardiovascular system of the human body. The planning of experiments in the modeling and optimization of the formulation of glue pastilles was carried out using a second-order orthogonal central compositional plan (OCCP) for two factors, the latter were chosen: the coefficient of pumpkin and cranberry content and the mass of pectin in the recipe mixture. In the course of constructing a mathematical model, the optimal formulation of an glue pastille called Tykovka was determined (the ratio of pumpkin and cranberry is 4: 1, respectively; the mass of pectin per 100 g of the recipe mixture is 2.8 g). The optimized recipe formed the basis of the technology for obtaining a new product, which included the following technological operations: receiving raw materials; preliminary preparation; preparation of pastel mass; molding; drying; cooling; gluing; cutting and twisting; dusting; packing, packing, marking; storage and sale. The organoleptic and physico-chemical characteristics of the new product were determined. The composition of vitamins and minerals has been determined as well. The product is distinguished by high content of ß-carotene, dietary fiber, as well as calcium, silicon, and copper. According to the content of those functional ingredients, Tykovka glue pastille can be classified as a functional food product.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"18 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":"121937215","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 selection of a filter for cleanrooms","authors":"A. Tsygankov, V. I. Lysev, O. V. Dolgovskaia, A. Hildayati","doi":"10.17586/1606-4313-2019-18-1-11-16","DOIUrl":"https://doi.org/10.17586/1606-4313-2019-18-1-11-16","url":null,"abstract":"Рассмотрена обобщенная схема фильтрации и сформулирована оптимизационная задача проектирования фильтров для чистых помещений, представлен анализ механизма удерживания пылевых частиц. Предложена модель фильтра, состоящая из множества цилиндрических эллиптических каналов, по которым движется запыленный воздух. Геометрические размеры каналов определяются из решения задачи линейного программирования минимизируюшей погрешность между результатами моделирования и предусмотренных действующими стандартами натурных испытаний фильтров. В качестве целевой функции оптимизационной задачи принят взвешенный аддитивный критерий, представляющий собой свертку комплекса технико-экономических параметров, заданных техническим заданием на проектирование системы фильтрации. Вектор варьируемых параметров представлен совокупностью воздушных фильтров с известными технико-экономическими параметрами. В качестве внутренних ограничений области допустимого решения выступают массогабаритные характеристики, количество ступеней фильтрации, количество потоков фильтрации, требования по акустике и т. п. Внешние ограничения — это параметры приточного и рециркуляционного воздуха (температура, влажность), дисперсионный состав пыли и ее физико-технические характеристики. Ключевые слова: чистые помещения, фильтрация, эквивалентный канал, дисперсионный состав пыли, ламинарное течение, оптимизационная задача, приточный и рециркуляционный воздух.","PeriodicalId":148431,"journal":{"name":"Journal International Academy of Refrigeration","volume":"186 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":"123004127","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}