Tobias Nienke, Juan Sebastian Gomez Bonilla, Arno Kwade, Daniel Eggerath
{"title":"结合不同的喷嘴概念,同时优化对流干燥应用中的传热及其均匀分布","authors":"Tobias Nienke, Juan Sebastian Gomez Bonilla, Arno Kwade, Daniel Eggerath","doi":"10.1080/07373937.2023.2260867","DOIUrl":null,"url":null,"abstract":"AbstractPrecise coating processes demand sensitive drying processes. The present work investigates the operation of hybrid convective drying nozzles for combining impingement nozzles with impingement-free nozzles. Impingement-free nozzles show good uniformity, whereas impingement nozzles are characterized by higher heat transfer but greater non-uniformity across the pitch. Volumetric flow ratio between the nozzle types, lateral distance, substrate distance and angle of impingement are the parameters of this study. Compared with purely impingement-free nozzles, the combination can achieve increased heat transfer with moderate losses in distribution uniformity. A divergent impingement jet with a small lateral distance and a small substrate distance proves to be advantageous. In addition, a consideration of energy requirements shows that impingement-free nozzles, due to their lower resistance, can deliver the same volume flow rates with lower blower power. As a result, the reduction of the impingement component in the hybrid nozzle is advantageous in terms of energy.Keywords: CoatingRoll2Rolldrying nozzleheat transfer Disclosure statementNo potential competing interest was reported by the authors.Table 1. Outlet velocity and Reynolds numbers for different volumetric flow ratios and nozzle types.Display TableTable 2. Coefficient of variation for different impingement angles.Download CSVDisplay Table","PeriodicalId":11374,"journal":{"name":"Drying Technology","volume":"36 1","pages":"0"},"PeriodicalIF":2.7000,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Combination of different nozzle concepts for simultaneous optimization of heat transfer and its uniform distribution in convection drying applications\",\"authors\":\"Tobias Nienke, Juan Sebastian Gomez Bonilla, Arno Kwade, Daniel Eggerath\",\"doi\":\"10.1080/07373937.2023.2260867\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"AbstractPrecise coating processes demand sensitive drying processes. The present work investigates the operation of hybrid convective drying nozzles for combining impingement nozzles with impingement-free nozzles. Impingement-free nozzles show good uniformity, whereas impingement nozzles are characterized by higher heat transfer but greater non-uniformity across the pitch. Volumetric flow ratio between the nozzle types, lateral distance, substrate distance and angle of impingement are the parameters of this study. Compared with purely impingement-free nozzles, the combination can achieve increased heat transfer with moderate losses in distribution uniformity. A divergent impingement jet with a small lateral distance and a small substrate distance proves to be advantageous. In addition, a consideration of energy requirements shows that impingement-free nozzles, due to their lower resistance, can deliver the same volume flow rates with lower blower power. As a result, the reduction of the impingement component in the hybrid nozzle is advantageous in terms of energy.Keywords: CoatingRoll2Rolldrying nozzleheat transfer Disclosure statementNo potential competing interest was reported by the authors.Table 1. Outlet velocity and Reynolds numbers for different volumetric flow ratios and nozzle types.Display TableTable 2. Coefficient of variation for different impingement angles.Download CSVDisplay Table\",\"PeriodicalId\":11374,\"journal\":{\"name\":\"Drying Technology\",\"volume\":\"36 1\",\"pages\":\"0\"},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2023-10-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Drying Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1080/07373937.2023.2260867\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Drying Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/07373937.2023.2260867","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Combination of different nozzle concepts for simultaneous optimization of heat transfer and its uniform distribution in convection drying applications
AbstractPrecise coating processes demand sensitive drying processes. The present work investigates the operation of hybrid convective drying nozzles for combining impingement nozzles with impingement-free nozzles. Impingement-free nozzles show good uniformity, whereas impingement nozzles are characterized by higher heat transfer but greater non-uniformity across the pitch. Volumetric flow ratio between the nozzle types, lateral distance, substrate distance and angle of impingement are the parameters of this study. Compared with purely impingement-free nozzles, the combination can achieve increased heat transfer with moderate losses in distribution uniformity. A divergent impingement jet with a small lateral distance and a small substrate distance proves to be advantageous. In addition, a consideration of energy requirements shows that impingement-free nozzles, due to their lower resistance, can deliver the same volume flow rates with lower blower power. As a result, the reduction of the impingement component in the hybrid nozzle is advantageous in terms of energy.Keywords: CoatingRoll2Rolldrying nozzleheat transfer Disclosure statementNo potential competing interest was reported by the authors.Table 1. Outlet velocity and Reynolds numbers for different volumetric flow ratios and nozzle types.Display TableTable 2. Coefficient of variation for different impingement angles.Download CSVDisplay Table
期刊介绍:
Drying Technology explores the science and technology, and the engineering aspects of drying, dewatering, and related topics.
Articles in this multi-disciplinary journal cover the following themes:
-Fundamental and applied aspects of dryers in diverse industrial sectors-
Mathematical modeling of drying and dryers-
Computer modeling of transport processes in multi-phase systems-
Material science aspects of drying-
Transport phenomena in porous media-
Design, scale-up, control and off-design analysis of dryers-
Energy, environmental, safety and techno-economic aspects-
Quality parameters in drying operations-
Pre- and post-drying operations-
Novel drying technologies.
This peer-reviewed journal provides an archival reference for scientists, engineers, and technologists in all industrial sectors and academia concerned with any aspect of thermal or nonthermal dehydration and allied operations.