Journal of Thermal Analysis and Calorimetry最新文献_第7页

A comparative study on the application of solar thermal collector and photovoltaic combinations to assist an air source heat pump 关于应用太阳能集热器和光电组合辅助空气源热泵的比较研究

IF 3 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-08-23 DOI: 10.1007/s10973-024-13475-z

Riza Buyukzeren, Ali Kahraman

{"title":"A comparative study on the application of solar thermal collector and photovoltaic combinations to assist an air source heat pump","authors":"Riza Buyukzeren, Ali Kahraman","doi":"10.1007/s10973-024-13475-z","DOIUrl":"10.1007/s10973-024-13475-z","url":null,"abstract":"<div>This study investigates the usage of photovoltaic (PV) and thermal collectors separately to assist a heat pump for supplying domestic hot water (DHW). Usage of PV and thermal collectors together to assist a heat pump and experimentally validated simulation of an air source heat pump can be considered as novelty of this study. Firstly, experimental tests were performed in a climatic room to validate the developed simulation model. Four experimental parameters, namely the coefficient of performance of the air source heat pump, average tank temperature, and heat pump inlet and outlet temperatures have been used for the validation and the highest obtained deviation was 4.5%. Simulations were carried out by adding thermal collectors and photovoltaic panels in different combinations, with a maximum of three collectors to assist the heat pump that provides DHW. For scenarios with one and two solar components (PV or thermal), applying only thermal collectors was more efficient and economical for both with a payback of 3.9 years and 4.3 years, respectively. For the scenario with three solar components, although the system supported by one thermal and two photovoltaic collectors was the most efficient option, the system supported by three photovoltaic collectors was the most economical scenario with a payback period of 4.6 years. The study found that combining thermal and photovoltaic collectors can significantly reduce energy consumption for DHW.</div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10973-024-13475-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Derivation of appropriate temperature change for application of phase change materials in building walls for energy reduction in Korean climatic conditions 在韩国气候条件下，推导在建筑墙体中应用相变材料以降低能耗的适当温度变化

IF 4.4 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-08-23 DOI: 10.1007/s10973-024-13466-0

Ki-Cheol Lee, Seonghyun Park, Chang-Young Park

{"title":"Derivation of appropriate temperature change for application of phase change materials in building walls for energy reduction in Korean climatic conditions","authors":"Ki-Cheol Lee, Seonghyun Park, Chang-Young Park","doi":"10.1007/s10973-024-13466-0","DOIUrl":"https://doi.org/10.1007/s10973-024-13466-0","url":null,"abstract":"Studies are underway to apply phase change materials (PCMs) to buildings to reduce energy consumption. PCMs can be expected to achieve energy savings by exploiting their high latent heat capacity and time-lag phenomenon, slowing down the heat transfer within the structure, and accumulating and releasing latent heat. This study analyzed the appropriate melting point and energy-saving effects based on changes in external climate conditions, attachment location, and PCM properties (thickness and thermal conductivity) through building energy simulations. Climate data were quantitatively categorized into climate zones based on heating degree hours, cooling degree hours, and insolation, and a total of 14 climate zones were proposed. The appropriate melting point based on climate was evidently more effective for cooling than for heating, and external attachment was proved to be more advantageous. As the thickness increased, the appropriate melting point decreased, and the energy-saving effect remained effective. The thermal conductivity increased with the graphite content by 0.90–2.37%, and the appropriate melting point also changed by 0.72–0.91 °C. As the thermal conductivity increased, heat was rapidly transferred within the PCM, altering its energy-saving effect by 0.18–3.35%.","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Comparative analysis of kinetic-free thermal runaway criteria for semi-batch isoperibolic homogeneous exothermic reaction 半批次等容均质放热反应的无动力学热失控标准比较分析

IF 4.4 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-08-22 DOI: 10.1007/s10973-024-13517-6

Rui Zhou, Ya-ting Chen, Jing-jing Xu, Jia-jia Jiang, Cui-mei Bo

{"title":"Comparative analysis of kinetic-free thermal runaway criteria for semi-batch isoperibolic homogeneous exothermic reaction","authors":"Rui Zhou, Ya-ting Chen, Jing-jing Xu, Jia-jia Jiang, Cui-mei Bo","doi":"10.1007/s10973-024-13517-6","DOIUrl":"https://doi.org/10.1007/s10973-024-13517-6","url":null,"abstract":"For the semi-batch isoperibolic homogeneous exothermic reaction, the dosing rate is an effective method to control the exothermic rate. In this work, the esterification of propionic anhydride and sec-butanol is taken as an example to obtain the heat of reaction by considering the heat of mixing effect. The effect of dosing rates on reaction temperature and heat transfer efficiency are investigated for the semi-batch reaction system. The dosing rate is optimized by kinetic-free thermal runaway criteria based on Ψ number and the νADaREκ-Xac,max & Rymin-Wt plots. The effect of cooling jacket temperature on the optimal dosing rates calculated by the criteria is investigated. The obtained results have been compared with the boundary and temperature diagrams criterion. The results show that safe operation conditions can be approximately obtained when lack of kinetic information for semi-batch reaction process. This work can provide a guidance which can facilitate the optimization of dosing rate to improve reaction efficiency and prevent thermal runaway.","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Effects of sand size on spread and heat transfer of continuous spill fires with small leakage rates 砂粒大小对小泄漏率连续泄漏火灾的蔓延和传热的影响

IF 4.4 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-08-22 DOI: 10.1007/s10973-024-13507-8

Jia Song, Ning Luo, Haihang Li, Jiahao Liu

{"title":"Effects of sand size on spread and heat transfer of continuous spill fires with small leakage rates","authors":"Jia Song, Ning Luo, Haihang Li, Jiahao Liu","doi":"10.1007/s10973-024-13507-8","DOIUrl":"https://doi.org/10.1007/s10973-024-13507-8","url":null,"abstract":"Spill fire, a kind of common fire accident, has the characteristics of strong sudden occurrence and fast spread rate, so there has been widespread concern about it. Compared with pool fire, there is limited research on spill fires now. In order to study the process of fire spread and combustion on sand substrate, a series of experiments were designed to investigate the effect of sand particle size on the spread and heat transfer of the continuous ethanol spill fire. The flame spread distance, substrate temperature, and penetrating heat radiation were measured. The resistance effect of sand, spread distance and rate, and steady linear burning rate were analyzed. Moreover, heat loss was also calculated. The results show that sand can effectively impede the development of spill fire. On the one hand, dry sand has strong capillary action, which makes most of the fuel adsorbed upward by the sand layer after entering the flow trough. Therefore, sand has obstructive capacity on the spread of liquid fuel, thereby shortening the spread distance of spill fire. On the other hand, sand has strong thermal conductivity, which can reduce the stable burning area of spill fire by increasing the total thermal feedback of spill fire and improving the steady burning rate of fuel. However, if the particle size of sand is too small, the liquid fuel will spill from the sand surface. In this case, the resistance effect of sand on the spread of liquid fuel will weaken. Therefore, sand with appropriate particle size should be selected for spill fire in practice.","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Analysis of flow and heat transfer characteristics of ethylene glycol-based magnetite nanoparticles squeezed between parallel disks with magnetic effect 基于乙二醇的磁铁矿纳米颗粒在平行磁盘间挤压的流动和传热特性分析

IF 4.4 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-08-22 DOI: 10.1007/s10973-024-13481-1

V. S. Sampath Kumar, B. Devaki, Pareekshith G. Bhat, Nityanand P. Pai, K. R. Vasanth, K. Ganesh Kumar

{"title":"Analysis of flow and heat transfer characteristics of ethylene glycol-based magnetite nanoparticles squeezed between parallel disks with magnetic effect","authors":"V. S. Sampath Kumar, B. Devaki, Pareekshith G. Bhat, Nityanand P. Pai, K. R. Vasanth, K. Ganesh Kumar","doi":"10.1007/s10973-024-13481-1","DOIUrl":"https://doi.org/10.1007/s10973-024-13481-1","url":null,"abstract":"This study aims to theoretically analyse the flow and heat transfer characteristics of ethylene glycol ((text{C}_{2}text{H}_{6}text{O}_{4}))-based nanofluid containing magnetite ((text{Fe}_{3}text{O}_{4})) nanoparticles squeezed between two parallel disks with magnetic effect. The governing nonlinear partial differential equations are transformed into nonlinear ordinary differential equations by employing a set of suitable similarity transformations. Further, by adopting the homotopy perturbation method (HPM), an approximate solution to the considered model is obtained. The solutions are compared with the classical finite difference method (FDM) and are in good agreement. The current study mainly emphasizes the analysis of velocity profile, skin friction coefficient, temperature distribution curve, and Nusselt number for different pertinent parameters. The findings in this study highlight the role of applied magnetic field in modifying the flow and heat transfer characteristics of the nanofluid, notably showing that an increase in the concentration of magnetite nanoparticles correlates with higher skin friction at the disk surfaces and enhances the Nusselt number, reflecting improved heat transfer performance. This underscores the potential of magnetite-enhanced nanofluids in enhancing the efficiency of thermal systems.","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Exergetic analysis of a domestic refrigerator with an innovative mini-channel flat tube condenser 带有创新型微型通道扁管冷凝器的家用冰箱的能效分析

IF 4.4 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-08-22 DOI: 10.1007/s10973-024-13553-2

M. Mete Ozturk, Bahadır Doğan, Mert Tosun, Tuğba Tosun, L. Berrin Erbay

{"title":"Exergetic analysis of a domestic refrigerator with an innovative mini-channel flat tube condenser","authors":"M. Mete Ozturk, Bahadır Doğan, Mert Tosun, Tuğba Tosun, L. Berrin Erbay","doi":"10.1007/s10973-024-13553-2","DOIUrl":"https://doi.org/10.1007/s10973-024-13553-2","url":null,"abstract":"In this study, the energetic and exergetic performance of a household refrigerator with a unique compact heat exchanger composed of a mini-channel flat tube condenser and offset strip fins (OSF) is investigated experimentally by considering varying amounts of R600a (48–64 g) and capillary tube lengths (2800, 3300, and 3800 mm). The experiments have been performed for two refrigerators involving two different innovative condensers composed of mini-channel flat tube and offset strip fins which have varying orientations instead of conventional wire-on-tube condensers. The experiments were conducted in a climatic chamber at a temperature of 25 ± 0.5°C. According to the standard of IEC 62552:2015, the target temperatures of the fresh food and freezer compartments are set at 4°C and −18°C, respectively. Specific and relative exergy destructions of each component, total exergy destruction, the coefficient of performance, and second-law efficiency of the overall system with two different mini-channel condensers are reported for varying amounts of refrigerant and capillary tube lengths. The major concern of the investigation is to reveal the key components contributing to the degradation of the overall performance of the unique design. It is observed that the evaporator, which has a ratio of 52–69% in total exergy destruction within all investigated cases, is the most exergy destructive component and the exergy destruction of the evaporator decreases when the amount of R600a increases. The mini-channel condensers are the second exergy destructive components with a ratio of 19–22%. As an important outcome of this unique design’s investigation, exergy destruction of the condenser and compressor does not show a monotonic change with respect to the refrigerant amount and capillary length. Besides, the highest coefficient of performance and second-law efficiency are obtained when the amount of R600a is 48–50 g in all three capillary tube lengths.","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Prediction of the heats of combustion for food-related organic compounds. A quantitative structure–property relationship (QSPR) study 预测食品相关有机化合物的燃烧热。定量结构-性能关系（QSPR）研究

IF 4.4 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-08-22 DOI: 10.1007/s10973-024-13559-w

Mario G. Diaz, Frida V. Dimarco Palencia, Matias F. Andrada, Esteban G. Vega-Hissi, Pablo R. Duchowicz, Juan C. Garro Martinez

{"title":"Prediction of the heats of combustion for food-related organic compounds. A quantitative structure–property relationship (QSPR) study","authors":"Mario G. Diaz, Frida V. Dimarco Palencia, Matias F. Andrada, Esteban G. Vega-Hissi, Pablo R. Duchowicz, Juan C. Garro Martinez","doi":"10.1007/s10973-024-13559-w","DOIUrl":"https://doi.org/10.1007/s10973-024-13559-w","url":null,"abstract":"In the field of food research, the determination of the heats of combustion (ΔcH) of the nutrients is essential to estimate the amount of energy obtained by metabolizing during digestion. Here, we have developed six novel QSPR models to predict this thermodynamic property of different families of organic compounds. The models were developed using the experimental data set of 215 compounds (71 organic acids, 28 amino acids, 37 amines and amides, 31 sulfur compounds and 48 heterocyclic compounds). About 16,000 molecular descriptors were calculated to represent the molecular structure of the compounds. The QSPR models resulted to be simple MLRs with a maximum of three variables, facilitating the interpretation and comparison with existing models in the literature. The statistical parameters exhibited excellent predictive capacity and robustness of the models obtained. The correlation coefficients of the selected models were major to 0.8 and the root means square error minor to 0.1. These results suggested that the models could be utilized for the prediction of the ΔcH of other compounds that could be present in the foods.","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Reactivity of precursors for geopolymerization studied by isothermal calorimetry 通过等温量热法研究土工聚合前体的反应性

IF 3 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-08-22 DOI: 10.1007/s10973-024-13492-y

Martin Keppert, Dana Koňáková, Vojtěch Pommer, Eva Vejmelková, Robert Černý

{"title":"Reactivity of precursors for geopolymerization studied by isothermal calorimetry","authors":"Martin Keppert, Dana Koňáková, Vojtěch Pommer, Eva Vejmelková, Robert Černý","doi":"10.1007/s10973-024-13492-y","DOIUrl":"10.1007/s10973-024-13492-y","url":null,"abstract":"<div>The paper deals with analyzes of Isothermal Conduction Calorimetry response obtained during the alkaline activation of four types of precursors (metakaolin, slag and two kinds of waste ceramic powders) to geopolymers. The first two precursors are traditionally used, while the latter two are emerging materials and knowledge of their alkaline activation might have high importance in the recycling of Construction and Demolition Waste. The studied precursors differ each to other not only in the chemical composition, but also in the phase composition—the waste ceramic precursors are highly crystalline. It was found that the total reaction heat evolved in the geopolymerization is directly proportional to the amorphous matter content as well as to the compressive strength of the activated product. This finding can be used as fast evaluation tool in searching of new potential geopolymer precursors. The dissolution and polycondensation steps were observed in all experiments and their kinetics was described by Jander’s equation. While the rate of dissolution step is not dependent on temperature, the polycondensation has been accelerated by the higher temperature. The level of the rate acceleration was described by apparent activation energy; these findings can be useful in tuning of geopolymers curing procedure.</div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Production and characterization of bio-oil from camelthorn plant using slow pyrolysis 利用缓慢热解技术从骆驼刺植物中生产生物油并确定其特性

IF 3 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-08-21 DOI: 10.1007/s10973-024-13551-4

Dina Aboelela, Habibatallah Saleh, Attia M. Attia, Y. Elhenawy, Thokozani Majozi, M. Bassyouni

{"title":"Production and characterization of bio-oil from camelthorn plant using slow pyrolysis","authors":"Dina Aboelela, Habibatallah Saleh, Attia M. Attia, Y. Elhenawy, Thokozani Majozi, M. Bassyouni","doi":"10.1007/s10973-024-13551-4","DOIUrl":"10.1007/s10973-024-13551-4","url":null,"abstract":"<div>In this study, slow pyrolysis of the camelthorn plant process was conducted to produce bio-oil, biochar, and gas. The pyrolysis process was conducted between 400 and 550 °C under pressure 10 bar using a fixed bed reactor. The pyrolysis products were bio-oil, biogas, and biochar. These products were characterized using Fourier-transform infrared (FT-IR) model, gas analyzer, chromatographic analysis using GC–MS, and thermogravimetric analysis (TGA). The GC–MS results demonstrated composition of bio-oil, detecting several organic substances including levoglucosan, furan, acetic acid, phenol, and long-chain hydrocarbon. To further understand the chemical composition of bio-oil, FT-IR spectroscopy was conducted to determine functional groups. The thermal behavior and degradation of the camelthorn sample were studied using TGA which provided thermal stability and prospective applications. Gas composition was measured using a gas analyzer. These analytical methods’ results offer insight on the camelthorn plant’s potential as a sustainable bio-oil and biochar sources, and these findings contribute to the advancement of biomass conversion expertise and provide vital insights for sustainable energy production.</div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Size scale effect on mass burning flux and flame behavior of solid fuels 尺寸尺度对固体燃料质量燃烧通量和火焰行为的影响

IF 3 3区工程技术

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-08-20 DOI: 10.1007/s10973-024-13453-5

Peiyi Sun, Tianhang Zhang, Xinyan Huang

{"title":"Size scale effect on mass burning flux and flame behavior of solid fuels","authors":"Peiyi Sun, Tianhang Zhang, Xinyan Huang","doi":"10.1007/s10973-024-13453-5","DOIUrl":"10.1007/s10973-024-13453-5","url":null,"abstract":"<div>The study investigates the horizontal fuel size effect on free-burning fires for PMMA plates and wood cribs. The fuel size effect on mass burning flux and flame behavior is mainly discussed and compared with typical pool fires. For the PMMA plate and liquid pool, when the fuel size is small (< 10 cm), either the 3D sidewall burning of PMMA or the container wall heated by flame can promote the burning flux at the horizontal projection area. As the fuel size increases, these side wall burning or heating effects decrease, causing the drop in burning flux with fuel scale for both the PMMA plate and liquid pool. For small-scale wood cribs, fire cannot self-sustain due to the large airflow cooling. With the increase in wood crib size, the burning rate first remains constant and then gradually increases, driven by the enhanced internal radiation. As the fuel size increases above 20–30 cm, the flame radiation dominates the burning flux for all fuel types. Fire dynamics simulator (FDS) was adopted to simulate the horizontal size effect by setting a varied fire source (horizontal projection) area. First, the flame geometry and heat release rate (HRR) of simulations were validated against experimental results. Subsequently, the validated fire model generates cases covering a broad range of fire scales. Finally, a new correlation of flame height with the fire heat release rate and fuel size is proposed, and its prediction capability is validated in the numerical fire modeling. This study quantifies the size effect on the burning rate for common solid fuels and provides valuable information for the numerical modeling of multi-scale fires.</div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10973-024-13453-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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