Thermal Science最新文献

Does agricultural productive service promote agro-ecological efficiency? Evidence from China 农业生产性服务促进农业生态效率吗?来自中国的证据

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci2303109l

Wang Tang, Faming Zhou, Liulin Peng, Mingzheng Xiao

{"title":"Does agricultural productive service promote agro-ecological efficiency? Evidence from China","authors":"Wang Tang, Faming Zhou, Liulin Peng, Mingzheng Xiao","doi":"10.2298/tsci2303109l","DOIUrl":"https://doi.org/10.2298/tsci2303109l","url":null,"abstract":"Given the background of the rural population ageing, the reduced agricultural non-point source pollution and the decreased agricultural carbon emission, agricultural producer services, as an important bridge between small farmers and modern agriculture, are an important path to ensure food security and the green development of agriculture. Based on panel data of 31 provinces in China from 2003 to 2020, this paper uses Slack-based measure model with undesirable outputs (SBM-undesirable model)to calculate the agricultural ecological efficiency of 31 provinces. Furthermore, the two-stage least squares, the panel threshold model and the spatial Durbin model are used to empirically analyze the influence mechanism and the spatial spillover effect of agricultural productive services on agricultural ecological efficiency. The results show that agricultural producer services have a significant non-linear impact on agricultural ecological efficiency. Rural residents' income and per capita cultivated land area can adjust the relationship between them. The two main ways for agricultural productive services to improve agricultural ecological efficiency are as follows: reducing undesirable outputs such as pesticides, chemical fertilizers and plastic sheeting for agricultural use and improving agricultural production efficiency. In addition, agricultural producer services have a significant positive spatial spillover effect on agricultural ecological efficiency, and the indirect impact elasticity of spatial spillover is higher than the direct impact elasticity. Therefore, to achieve food security and promote the sustainable development of agriculture, it is necessary to vigorously develop agricultural productive ser-vices through multiparty cooperation.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68261415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Methodology for aeroacoustic noise analysis of 3-bladed h-Darrieus wind turbine 三叶片h-Darrieus风力机气动噪声分析方法

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci2301061d

Mirko Dinulović, M. Trninic, B. Rašuo, Dejan Kožović

引用次数: 0

Damage mechanism of concrete with recycled brick aggregate 再生砖骨料混凝土损伤机理研究

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci2303145w

Zhengjiang Wang, Yang Yang, Y. Su, J. Wang, Zhongping Wei, Yajuan Li, Jiawei Li, Chao Zhu

引用次数: 0

Operational characteristics of the CHP plant in the district heating system of Belgrade 贝尔格莱德区域供热系统热电联产电厂的运行特点

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci230405158t

V. Tanasić, N. Tanasić, M. Stamenić

{"title":"Operational characteristics of the CHP plant in the district heating system of Belgrade","authors":"V. Tanasić, N. Tanasić, M. Stamenić","doi":"10.2298/tsci230405158t","DOIUrl":"https://doi.org/10.2298/tsci230405158t","url":null,"abstract":"The combined production of electricity and thermal energy (CHP or cogeneration) is the most efficient and convenient approach to reduce costs for energy at industrial power plants and district heating plants that use natural gas as fuel to produce thermal energy for various needs. This paper analyses the operational characteristics of the CHP plant, which has been operating since January 1, 2021, at the Vozdovac Heating Plant as part of the Belgrade district heating system. The CHP plant consists of three gas engine units with a total nominal electric power of 10 MW and thermal power of 10.1 MW, which use natural gas as fuel. The CHP plant is used for district heating and preparing domestic hot water (DHW) while electricity is sold to the local electric grid. The analysis in this paper focuses on the plant's operational characteristics: the number of working hours, the total energy consumption and energy production, the efficiency as well as the operational and maintenance costs. Also, the impact of the drastic changes in the prices of natural gas, electricity, and maintenance costs in the last year on the financial profitability of the CHP plant was analysed in particular.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68263511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Heat management system of electric vehicle based on heat pump and energy recovery of removable battery 基于热泵和可拆卸电池能量回收的电动汽车热管理系统

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci2302215x

Yuanfei Xue, Xudong Diao, Xin Li

{"title":"Heat management system of electric vehicle based on heat pump and energy recovery of removable battery","authors":"Yuanfei Xue, Xudong Diao, Xin Li","doi":"10.2298/tsci2302215x","DOIUrl":"https://doi.org/10.2298/tsci2302215x","url":null,"abstract":"In order to manage the air-conditioning thermal system, battery thermal system and motor thermal system in a unified manner, the author proposes a self-developed integrated thermal management system for electric vehicles to recover battery energy. Firstly, the problems in the development of electric vehicles and the importance of thermal management system are introduced, secondly, the self-developed thermal management system scheme and the principle of each part are analyzed, the experimental results of thermal system in enthalpy difference chamber are also introduced. The experimental results show that: Under the double evaporation system, when the compressor speed is 4500 rpm, the maximum COP is 2.46, and the maximum COP charge is 1180 g, the maximum heat transfer capacity is 4819 W (wind side heat transfer + water side heat transfer), the evaporation temperature is 5.35?C, the evaporation superheat is 9.5?C, the condensation temperature is 59.3?C, the undercooling degree is 10.4?C, the suction pressure is 280 kPa, and the exhaust pressure is 1694 kPa. In conclusion, the thermal management system has great energy saving effect, which ensures that the electric vehicle range will not be greatly attenuated under winter heating conditions, and meets the requirements of comfort.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68259819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Analytical and computational results for boundary-layer equations in porous medium 多孔介质边界层方程的解析与计算结果

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci23s1163a

Iftikhar Ahmad, Aziz Khan, K. Shah, T. Abdeljawad, S. Islam

引用次数: 0

Assessment of detected in situ and modeled PM10/2.5 concentration levels during the urban transformation process in Novi Sad, Serbia 塞尔维亚诺维萨德城市转型过程中原位检测和模拟PM10/2.5浓度水平的评估

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci220215108s

Miljan Sunjevic, D. Reba, V. Rajs, B. Vujic, Milovan Ninkov, M. Vojinovic-Miloradov

{"title":"Assessment of detected in situ and modeled PM10/2.5 concentration levels during the urban transformation process in Novi Sad, Serbia","authors":"Miljan Sunjevic, D. Reba, V. Rajs, B. Vujic, Milovan Ninkov, M. Vojinovic-Miloradov","doi":"10.2298/tsci220215108s","DOIUrl":"https://doi.org/10.2298/tsci220215108s","url":null,"abstract":"Ambient air pollution is a very considerable and complex physicochemical and environmental issue. Particulate matter - PM is one of the fundamental pollutants constituted in ambient air. Rapidly expanding urban transformations in city of Novi Sad, Serbia, produces high concentrations of PM. The vast and growing number of construction sites as pollution emission hotspots induce constant nuisance for the people, build surrounding and environment in total. Serbian legislation has set PM pollution limit values for daily emissions, but the Air Pollutant Registry still doesn?t recognize construction sites as severe sources of PM emergence. Understanding the importance and the effects of PM emission from construction sites is crucial in environmental preservation. For the preparation and application of methods and techniques for prevention and mitigation, suitable environmental pollution modeling needs to be achieved. The aim of the research is to assess and determine the utility of Tier 1 prediction model designed by EPA and environmental modeling software ADMS - URBAN on observed construction sites in Novi Sad, Serbia. Assessing monitoring data confirms construction sites as significant PM 10 and PM2.5 pollution sources. Two sets of correction coefficients were calculated for PM10 and PM2.5, using average and median values, 2.56 - 2.54 and 1.03 - 0.97 respectively. The research study was for the first time conducted in Novi Sad, Serbia in the case of construction sites.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68236762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

The role of microclimate in the formation of indoor air pollution 小气候在室内空气污染形成中的作用

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci220215105k

Oskars Kalva

{"title":"The role of microclimate in the formation of indoor air pollution","authors":"Oskars Kalva","doi":"10.2298/tsci220215105k","DOIUrl":"https://doi.org/10.2298/tsci220215105k","url":null,"abstract":"Indoor air quality plays a key role in assessing people's quality of life, as a large proportion of people spend up to 22 hours a day indoors and people are exposed to indoor air almost all day long [1]. People in developed countries spend much more time indoors. Recently, employers are paying more and more attention to ensuring the well - being of employees, as it affects the quality and productivity of their work [2, 3]. Ensuring an appropriate working environment on the part of employers ensures both sustainable social and economic links. Well-being can be affected by various parameters of the indoor environment, in addition to the microclimate, they can be - lighting, noise level, various odors. However, one of the primary indicators of comfort or discomfort in an indoor environment is thermal comfort or discomfort [4]. Gas stations were chosen as place for measurements because they are considered dangerous for several reasons: gas station territory is potentially hazardous with a high environmental risk and explosion hazard. Working shifts and nights is also considered undesirable for human health as it disrupts the biological rhythms in the human body [5]. In such circumstances, the indoor microclimate and air parameters play a very important role, as spending long hours in inappropriate microclimatic conditions is likely to lead to various long - term health problems for the workers.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68237204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 comparative study on 3E (energy, exergy and economic) analysis of solar PV operated dome-shaped solar stills 太阳能光伏运行的圆顶型太阳能蒸馏器3E(能源、能源和经济)分析比较研究

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci220502168p

Ragupathy Palaniappan, V. Murugesan, Kumaresan Govindasamy, Lakshmi Manirao

{"title":"A comparative study on 3E (energy, exergy and economic) analysis of solar PV operated dome-shaped solar stills","authors":"Ragupathy Palaniappan, V. Murugesan, Kumaresan Govindasamy, Lakshmi Manirao","doi":"10.2298/tsci220502168p","DOIUrl":"https://doi.org/10.2298/tsci220502168p","url":null,"abstract":"The present investigation centres on the empirical examination of a solar photovoltaic (PV) system that is integrated with a dome-shaped solar still (DSSS) in order to facilitate the process of desalination. The objective is to increase the production of freshwater through the utilisation of saline water at elevated temperatures. The assessment of the DSSS system's efficacy is conducted through the examination of various parameters, including water yield, energy, exergy, concentrator performance, and economic feasibility. The study's results demonstrate that the DSSS system's water yield, energy, and exergy were evaluated under varying inlet temperatures and mass flow rates. The study recorded the water yield, energy, and exergy at 4.73, 4.27, and 4.91 l/m?, respectively, with respect to the ambient inlet temperature. The water yield was observed to range from 6.9 to 7.7 litres per square metre under different input temperatures and air mass flow rates. The DSSS system's energy and exergy efficiency were evaluated, indicating encouraging results for various inlet air temperatures. Furthermore, the economic evaluation revealed that the rate of freshwater production was cost-effective in comparison to conventional solar stills. In summary, this research offers empirical proof of the efficacy of a solar photovoltaic-powered dome-shaped solar still for the purpose of desalination. It emphasises enhancements in the output of fresh water, energy and exergy efficiency, and the economic viability of this technology.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68243012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

An optimized method for TTSV placement with non-uniform heat sources in 3D-IC 3D-IC中非均匀热源TTSV的优化布置方法

IF 1.7 4区工程技术

Thermal Science Pub Date : 2023-01-01 DOI: 10.2298/tsci220801021d

Feng Dai, Zhong-liang Pan

引用次数: 0