International Journal of Refrigeration-revue Internationale Du Froid最新文献_第2页

A centralized frost detection and estimation scheme for Internet-connected domestic refrigerators 用于联网家用冰箱的集中霜冻检测和估算方案

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-31 DOI: 10.1016/j.ijrefrig.2024.10.032

Hammad Ur Rahman, Mussawir Ul Mehmood, Ismail Lazoglu

{"title":"A centralized frost detection and estimation scheme for Internet-connected domestic refrigerators","authors":"Hammad Ur Rahman, Mussawir Ul Mehmood, Ismail Lazoglu","doi":"10.1016/j.ijrefrig.2024.10.032","DOIUrl":"10.1016/j.ijrefrig.2024.10.032","url":null,"abstract":"<div><div>Frost accumulation on heat exchange units is a significant problem in refrigeration systems, adversely affecting their operating performance and thereby leading to increased power consumption. Therefore, timely detection and accurate quantification of frost are crucial for effective defrosting strategies. This study presents a novel centralized cloud-based IoT scheme for frost detection and thickness estimation. The image processing is performed on the cloud server to process evaporator coil images for frost thickness quantification. Experiments were conducted on a domestic refrigerator to assess the effectiveness of the proposed image-processing approach and determine latency and processing time. The presented scheme effectively quantifies frost thickness on the evaporator in the 1–5 mm range with a 10.8% error margin. The total inference time, which includes image acquisition, pre-processing, transmission latency, and frost thickness estimation, is approximately 5.15 seconds. The results demonstrate that the proposed image processing method performs comparably to conventional sensors and similar image processing techniques. Moreover, the centralized cloud-based IoT architecture presented effectively meets the scalability demands of consumer refrigerators.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"169 ","pages":"Pages 194-203"},"PeriodicalIF":3.5,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel characterization methodology for vapor-injected compressors: A comparative analysis with existing black-box models 喷气式压缩机的新型表征方法：与现有黑箱模型的比较分析

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-31 DOI: 10.1016/j.ijrefrig.2024.10.036

Amjid Khan, Craig R. Bradshaw

{"title":"A novel characterization methodology for vapor-injected compressors: A comparative analysis with existing black-box models","authors":"Amjid Khan, Craig R. Bradshaw","doi":"10.1016/j.ijrefrig.2024.10.036","DOIUrl":"10.1016/j.ijrefrig.2024.10.036","url":null,"abstract":"<div><div>In regions characterized by high temperature gradients, vapor compression systems often necessitate operation at very high pressure ratios resulting in a reduction in system capacity. Economized vapor injection compressors are used to avoid these issues, yet a precise predictive map for various compressor technologies with minimal data and relatively better performance remains unclear. This paper establishes a black-box compressor model to accurately predict compressor power, injection mass ratio, and evaporator mass flow rate in compressors with a single vapor injection port. This model is compared against three legacy models from literature and the ANN model, for reference. All five models are evaluated based on their ability to predict the aforementioned metrics. The proposed black-box model can predict the relevant metrics all within 5 % Mean Absolute Percentage Error (MAPE). Additionally, a refrigerant sensitivity analysis is performed with the black-box models. The model is trained using data from R410A and then used the coefficients to predict the performance of the same compressor when using R454B, and vice versa. It can estimate the evaporator mass flow rate with an accuracy within 3 %, the power within 2 %, and the injection mass ratio with MAPE less than 3 %.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"169 ","pages":"Pages 254-266"},"PeriodicalIF":3.5,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monitoring the heating energy performance of a heat wheel in a direct expansion air handling unit 监测直接膨胀式空气处理机组中热轮的供热能效比

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-31 DOI: 10.1016/j.ijrefrig.2024.10.035

Miklos Kassai , Laith Al-Hyari

{"title":"Monitoring the heating energy performance of a heat wheel in a direct expansion air handling unit","authors":"Miklos Kassai , Laith Al-Hyari","doi":"10.1016/j.ijrefrig.2024.10.035","DOIUrl":"10.1016/j.ijrefrig.2024.10.035","url":null,"abstract":"<div><div>This study presents an on-site examination of the heating energy performance of a real ventilation system, running on the flat roof of a shopping complex building in Hungary. The main focus of this study is to delve into the heating energy efficiency of specific air handling elements, such as the air-to-air rotary heat wheel and the direct expansion heating coil supplied by a variable refrigerant volume outdoor unit under real operation conditions. Additionally, an investigation was carried out during the heating season to scrutinize the potential occurrence of CO<sub>2</sub> transfer from the exhaust airflow to the supply airflow within the heat wheel, which issue highlights a notable limitation of the heat recovery system. Based on the monitored and measured data, the energy saving impact of the heat wheel was 20.5 % on the electric power consumption of the variable refrigerant volume outdoor unit throughout the entire heating period, compared to operation without heat wheel. Furthermore, the relative average of CO<sub>2</sub> cross-contamination is recorded as 3.8 % in the investigated heating season.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"169 ","pages":"Pages 115-123"},"PeriodicalIF":3.5,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Achieving off-grid refrigeration in remote areas: A solar-powered vapor compression refrigerator prototype with PCM integration 在偏远地区实现离网制冷：集成 PCM 的太阳能蒸汽压缩冰箱原型

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-30 DOI: 10.1016/j.ijrefrig.2024.10.028

Angelo Maiorino , Fabio Petruzziello , Arcangelo Grilletto , Claudio Cilenti , Ciro Aprea

{"title":"Achieving off-grid refrigeration in remote areas: A solar-powered vapor compression refrigerator prototype with PCM integration","authors":"Angelo Maiorino , Fabio Petruzziello , Arcangelo Grilletto , Claudio Cilenti , Ciro Aprea","doi":"10.1016/j.ijrefrig.2024.10.028","DOIUrl":"10.1016/j.ijrefrig.2024.10.028","url":null,"abstract":"<div><div>The availability of vaccines, medicines, and perishable goods in remote or off-grid areas remains a formidable challenge. Integrating solar photovoltaic (PV) systems with refrigeration technology has emerged as a promising solution to address this critical need. This paper presents an autonomous solar-powered refrigerator prototype for off-grid refrigeration in remote areas utilising renewable energy. The system comprises a 160 W photovoltaic module, a 12/24 V DC compressor refrigerator, a lead-acid battery, and a Maximum Power Point Tracking (MPPT) controller. Its main feature is complete autonomy from the electricity grid, thanks to its standalone configuration. An experimental campaign evaluated the system's behaviour in the laboratory for 24 h at different set-point temperatures. A water-based Phase Change Material (PCM) was implemented to improve its autonomy in severe outdoor conditions. A further experimental campaign emulated the functioning of the prototype while managing the temperature of a sample solution whose melting temperature was equal to – 21 °C to ensure its liquid state during the tests. The target range for preserving the sample was defined at ± 1 °C. Several real conditions have been considered, such as higher cooling loads realised through 21 litres of additional thermal mass in the refrigerator and pick and place conditions for simulating the opening and closing of the door. The results demonstrate that the solar refrigerator prototype achieves complete autonomy from the electricity grid, paving the way for solutions for preserving perishable goods such as medicines and food in unelectrified areas.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"169 ","pages":"Pages 267-278"},"PeriodicalIF":3.5,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of different freezing temperatures on the physical, technological, and organoleptic properties of aged semimembranosus muscles from farmed fallow deer (Dama dama) 不同冷冻温度对养殖坡鹿（Dama dama）陈年半膜肌肉的物理、技术和感官特性的影响

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-28 DOI: 10.1016/j.ijrefrig.2024.10.029

Eva Kudrnáčová , Tersia Kokošková , Nicole Lebedová , Daniel Bureš

{"title":"Effect of different freezing temperatures on the physical, technological, and organoleptic properties of aged semimembranosus muscles from farmed fallow deer (Dama dama)","authors":"Eva Kudrnáčová , Tersia Kokošková , Nicole Lebedová , Daniel Bureš","doi":"10.1016/j.ijrefrig.2024.10.029","DOIUrl":"10.1016/j.ijrefrig.2024.10.029","url":null,"abstract":"<div><div>Although venison could play an important role in human nutrition, this meat remains undervalued and still contributes very little to the formal meat industry. Moreover, information on processing methods of fallow deer meat and overall quality is still very limited. The objective of this study was to determine how physical, technological, and organoleptic properties differ between 14-day-aged vacuum-packaged fallow deer meat stored either chilled or frozen at different temperatures (-10 °C, -18 °C, -40 °C and -80 °C) for six months. Physical, technological, and organoleptic analyses were conducted on <em>semimembranosus</em> muscles (SM) obtained from farmed fallow deer bucks (<em>n</em>= 10). Freezing significantly increased meat redness, yellowness, chroma values, cooking loss and tenderness compared to fresh meat but did not affect pH values, lightness, thawing, or grilling loss. Mean pH readings were 5.5–5.6, being highest in the samples measured one day after slaughter. Freezing at -80 °C had the most pronounced effect on some sensory attributes, namely, the highest game meat aroma intensity, sour odour, sour flavour and the lowest chewiness. The findings indicate that a freezing temperature of -18 °C and subsequent slow thawing might be preferential in terms of maintaining fallow deer meat quality.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"169 ","pages":"Pages 323-333"},"PeriodicalIF":3.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on hydraulic performance and cavitation characteristics of a R134a refrigerant self-lubricating centrifugal pump R134a 制冷剂自润滑离心泵的水力性能和气蚀特性试验研究

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-28 DOI: 10.1016/j.ijrefrig.2024.10.027

Ze Zhang , Song Yang , Beile Zhang , Xufeng Fang , Rong Xue , Shuangtao Chen , Yu Hou

{"title":"Experimental study on hydraulic performance and cavitation characteristics of a R134a refrigerant self-lubricating centrifugal pump","authors":"Ze Zhang , Song Yang , Beile Zhang , Xufeng Fang , Rong Xue , Shuangtao Chen , Yu Hou","doi":"10.1016/j.ijrefrig.2024.10.027","DOIUrl":"10.1016/j.ijrefrig.2024.10.027","url":null,"abstract":"<div><div>As the primary power equipment in pump flooding cooling systems, the efficiency and performance of mechanical pumps play a crucial role in two-phase cooling systems. A high-speed centrifugal pump with self-lubricating working fluid was designed with a speed of 7500 rpm and a flow coefficient of 0.0506. The hydraulic and cavitation performance of the pump were tested with R134a as the working fluid. The results show that the working fluid pump is capable of efficiently pumping R134a with an efficiency of 40.3 % and a head coefficient of 0.988 under the design condition. Within the tested range of inlet temperature from 5°C to 15°C, the flow coefficient from 0.01 to 0.105, and the height of the refrigerant tank from 1.4 m to 5 m, lower net positive suction heads available at the same flow rate will reduce the pump head, increase power consumption, and decrease efficiency. Increasing the pump speed from 3000 rpm to 7500 rpm can improve the pump's performance. At 6000 rpm, the critical cavitation number of the working fluid pump increases with the increase in flow coefficient. At 7500 rpm, the critical cavitation number has a minimum value when the flow coefficient φ = 0.0434. At the design speed and flow rate, both the critical cavitation coefficient and fracture cavitation number increase as the inlet temperature decreases. The inducer can significantly reduce the critical cavitation number of the pump. Finally, an empirical correlation considering the thermodynamic effects is proposed to predict the increase in the critical cavitation number.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"169 ","pages":"Pages 204-213"},"PeriodicalIF":3.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced model for a non-adiabatic capillary tube considering both subcooled liquid and non-equilibrium two-phase states of R-600a 考虑到 R-600a 过冷液体和非平衡两相状态的非绝热毛细管高级模型

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-28 DOI: 10.1016/j.ijrefrig.2024.10.031

Seongjun Jeon , Jaedeok Ko , Hyoin Lee , Ji Hwan Jeong

{"title":"Advanced model for a non-adiabatic capillary tube considering both subcooled liquid and non-equilibrium two-phase states of R-600a","authors":"Seongjun Jeon , Jaedeok Ko , Hyoin Lee , Ji Hwan Jeong","doi":"10.1016/j.ijrefrig.2024.10.031","DOIUrl":"10.1016/j.ijrefrig.2024.10.031","url":null,"abstract":"<div><div>Previous empirical correlations have largely failed to predict the mass flow rate variations of R-600a during the transient pull-down operation of household refrigerators. This shortcoming is attributed to the fact that these correlations were developed for specific thermodynamic states of the refrigerant at the capillary inlet, whereas the thermodynamic state varies during transient operations, particularly involving non-equilibrium two-phase states. To address these limitations, a novel model has been developed. This model comprises two distinct sub-models corresponding to the refrigerant state at the capillary tube inlet: one for the subcooled liquid state and the other for the non-equilibrium two-phase state. These sub-models are integrated to account for the transitions in the thermodynamic state of R-600a at the capillary inlet. The integrated model demonstrates excellent agreement with observed variations in the R-600a mass flow rate during the pull-down operation of actual refrigerators. The mean absolute percentage error between the measured and estimated mass flow rates is approximately 10 % over the entire period of pull-down operations tested under various environmental conditions.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"169 ","pages":"Pages 140-151"},"PeriodicalIF":3.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research and thermal comfort analysis of the air conditioning system of the Ferris wheel car based on thermoelectric cooling 基于热电冷却的摩天轮轿厢空调系统研究与热舒适性分析

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-28 DOI: 10.1016/j.ijrefrig.2024.10.030

Huizhi Li , Kuansheng Huang , Jiahui Liu , Mingjing Zhu , Jinchao Xing

{"title":"Research and thermal comfort analysis of the air conditioning system of the Ferris wheel car based on thermoelectric cooling","authors":"Huizhi Li , Kuansheng Huang , Jiahui Liu , Mingjing Zhu , Jinchao Xing","doi":"10.1016/j.ijrefrig.2024.10.030","DOIUrl":"10.1016/j.ijrefrig.2024.10.030","url":null,"abstract":"<div><div>To solve the problem of thermal discomfort caused by the lack of cooling facilities on the Ferris wheel and to investigate the effect of the coupling effect of thermoelectric modules on the thermoelectric cooling (TEC) system, this paper proposes a two-module thermoelectric cooling and air-conditioning system that can be applied to the Ferris wheel. Firstly, the experimental platform was established to test the performance parameters of the TEC system and reveal the influence of the thermoelectric module (TEM) coupling effect on the system performance. Then, the thermal environment inside the Ferris wheel was simulated using the CFD method and human thermal comfort was evaluated. The results show that when the voltage of TEM1 and TEM2 is 10 V and 6 V respectively, the thermoelectric cooling and air-conditioning system has the best working performance, and the coefficient of performance (COP) is 0.43. And the human thermal comfort deviation A<sub>EQT</sub> is 0.29, which is in a comfortable state under the action of the air-conditioning system.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"169 ","pages":"Pages 80-88"},"PeriodicalIF":3.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative detection of refrigerant charge faults in multi-unit air conditioning systems based on machine learning algorithms 基于机器学习算法的多单元空调系统制冷剂充注故障定量检测

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-26 DOI: 10.1016/j.ijrefrig.2024.10.026

Tong Zhao, Junhong Yang, Junda Zhu, Mengbo Peng, Can Lu, Zekun Shi

{"title":"Quantitative detection of refrigerant charge faults in multi-unit air conditioning systems based on machine learning algorithms","authors":"Tong Zhao, Junhong Yang, Junda Zhu, Mengbo Peng, Can Lu, Zekun Shi","doi":"10.1016/j.ijrefrig.2024.10.026","DOIUrl":"10.1016/j.ijrefrig.2024.10.026","url":null,"abstract":"<div><div>Refrigerant charging discrepancies constitute the predominant malfunctions in air conditioning systems. Achieving the optimal charging level is crucial for system performance, underscoring the importance of precise refrigerant level prediction. This study introduces an algorithm designed for the quantitative detection of refrigerant charging errors by integrating the Markov Transition Field (MTF), Convolutional Neural Networks (CNN), and Multi-head Self-Attention (MSA) mechanisms. A high-precision enthalpy difference chamber was employed to establish a Variable Refrigerant Flow (VRF) refrigerant charging test bench. This setup facilitated the analysis of system parameter sensitivity to charging faults and aided in the creation of a training dataset for the algorithm. Comparative analysis was conducted against Support Vector Machines (SVM), Random Forests (RF), CNN with Self-Attention (AT), and MTF-CNN-MSA. The findings reveal that our method adeptly captures temporal dependencies and dynamic shifts in time series as visual representations, offering novel insights for discerning fault patterns within such data. Notably, the maximum pressure variations at high-pressure and low-pressure points were 0.25 MPa and 0.07 MPa, respectively, with temperature shifts of 12 °C and 3.5 °C at the high and low-temperature points. The high-pressure and high-temperature points are particularly sensitive to changes in refrigerant charging, and parameters from these sections were utilized to construct the dataset. The CNN-MSA algorithm demonstrates consistent performance across various fault types, effectively delineating fault characteristics. The accuracies achieved by SVM, RF, CNN-AT, and MTF-CNN-MSA were 84.38 %, 73.75 %, 88.13 %, and 93.75 %, respectively. In comparison, the CNN-MSA algorithm was able to more accurately detect refrigerant charge faults at different levels.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"169 ","pages":"Pages 184-193"},"PeriodicalIF":3.5,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation and experimental study on splitting performance of Rectifier Nozzle Type Critical Distributor for multi-parallel evaporators 多平行蒸发器整流喷嘴型临界分配器分流性能的模拟和实验研究

IF 3.5 2区工程技术

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-10-22 DOI: 10.1016/j.ijrefrig.2024.10.022

Xiaofeng Li, Wenfu Zhang, Zhili Sun, Di Liang, Lei Yan, Haiwang Zhao, Jiale Chen, Fumin Hou, Xian Lv, Dandan Wang, Jiangman Yan

{"title":"Simulation and experimental study on splitting performance of Rectifier Nozzle Type Critical Distributor for multi-parallel evaporators","authors":"Xiaofeng Li, Wenfu Zhang, Zhili Sun, Di Liang, Lei Yan, Haiwang Zhao, Jiale Chen, Fumin Hou, Xian Lv, Dandan Wang, Jiangman Yan","doi":"10.1016/j.ijrefrig.2024.10.022","DOIUrl":"10.1016/j.ijrefrig.2024.10.022","url":null,"abstract":"<div><div>To solve the problem of performance degradation of multi-parallel evaporator due to inhomogeneous refrigerant distribution, a Rectifier Nozzle-Type Critical Distributor (RNCD) was developed. The multi-parallel evaporator test bench with RNCD and Centrifugal Distributor (CD) was built and the four parameters of cooling rate, outlet degree of overheat, pressure drop and cooling capacity of multi-parallel evaporator with RNCD were analyzed. Research shows that: The application of RNCD can improve the uniformity of superheat and cooling capacity while increasing the cooling rate of the system. When evaporator temperature is -28 °C, the ratio of overheat inhomogeneity of RNCD than CD was reduced by 0.58, and the ratio of cooling capacity inhomogeneity of branches was reduced by 0.45. The total pressure drop of the three components is roughly the same as that of the evaporator. RNCD can bear more pressure drop of the throttle valve. Combined with the simulation of experimental conditions, the study shows that RNCD has better distribution ability and can play the role of secondary throttle pressure drop. The RNCD proposes a novel approach to addressing the issue of inhomogeneous refrigerant distribution in refrigeration system as well as the optimization of the refrigeration system.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"169 ","pages":"Pages 101-114"},"PeriodicalIF":3.5,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0