Energy and Sustainability VIII最新文献_第2页

Energy and Sustainability VIII Pub Date : 2019-09-10 DOI: 10.2495/ESUS190061

M. I. Abreu, R. Oliveira, J. Lopes

{"title":"ENERGY-RELATED HOUSING RENOVATIONS FROM AN EVERYDAY LIFE PERSPECTIVE: LEARNING FROM PORTUGUESE HOMEOWNERS","authors":"M. I. Abreu, R. Oliveira, J. Lopes","doi":"10.2495/ESUS190061","DOIUrl":"https://doi.org/10.2495/ESUS190061","url":null,"abstract":"Changing the attitudes of existing building users towards sustainability is a paramount strategy towards a low-carbon society. One of the challenges lies in encouraging owners to renovate their houses. Recent studies have pointed out the relevance of the homeowner’s social context which, more often than not, outstrips public awareness campaigns and even techno-economic advice. The decision to renovate seems to emerge from deep social issues rather than exclusively from the simple analysis of investment return or environmental awareness. The present study aims to bring discussion to these social subjects for single-family buildings in Portugal and identify key factors which may influence decision making. Firstly, a set of in-depth interviews were conducted with a group of experts. Subsequently, and based on the interviews, a group of Portuguese single-family homeowners, who undertook at least one energyrelated piece of work, were surveyed. Together with the survey a structured observation method was put into practice. The results revealed that homeowner’s stage of life, personal/family events, everyday practices, lifestyles and social network framework have a major influence on their prime intention to renovate their homes. The desire to maintain or change the routines and the way family uses the indoor spaces are common drivers, however, motivations linked to aesthetics, trends and social status were revealed to be extremely influencing. The decision process is negotiated inside the family involving not only desired domestic life conditions but also skills, understandings and social values shared by the dwellers. The energy-related renovations take place, in many cases, as a consequence of a previous decision to renovate, taken due to other reasons. It does not consist of one single event but is rather part of a practice of a “little-by-little renovation”. Motivational policies should be drawn considering the energy-related renovations as any other type of renovation and not separately from the others.","PeriodicalId":153520,"journal":{"name":"Energy and Sustainability VIII","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116312720","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}

引用次数: 4

CALCULATION METHOD FOR FIN-AND-TUBE HEAT EXCHANGERS OPERATING WITH NONUNIFORM AIRFLOW 非均匀气流翅片管式换热器的计算方法

Energy and Sustainability VIII Pub Date : 2019-09-10 DOI: 10.2495/ESUS190021

Paolo Blecich, Anica Trp, Kristian Leniæ

{"title":"CALCULATION METHOD FOR FIN-AND-TUBE HEAT EXCHANGERS OPERATING WITH NONUNIFORM AIRFLOW","authors":"Paolo Blecich, Anica Trp, Kristian Leniæ","doi":"10.2495/ESUS190021","DOIUrl":"https://doi.org/10.2495/ESUS190021","url":null,"abstract":"This paper presents a new calculation method for fin-and-tube heat exchangers operating with nonuniform airflow. The calculation method consists of discretizing the heat exchanger tubes into tube elements and applying mass and energy conservation equations. The calculation method is capable of predicting local and overall values of thermal effectiveness, heat transfer rates and fluid outlet temperatures in fin-and-tube heat exchangers subject to airflow nonuniformity. The results of the tube element method are compared against experimental data, and good accordance has been achieved between predicted and measured values. Experimental data is collected for fin-and-tube heat exchangers placed inside an open wind tunnel, where airflow nonuniformity is generated by partially obstructing the entrance cross section. This study revealed that airflow nonuniformity causes effectiveness deterioration in fin-and-tube heat exchangers. The exact value of effectiveness deterioration depends on the heat exchanger dimensionless groups – the number of heat transfer units (NTU) and the heat capacity rate ratio ( C *) – as well as on the intensity and orientation of the airflow nonuniformity. The design of the tube-side fluid circuitry, which affects the heat exchanger flow arrangement, also plays a role in the effectiveness deterioration. The tube element method revealed that the effectiveness deterioration increases with the intensity of airflow nonuniformity. For an observed nonuniform airflow profile, the effectiveness deterioration is maximum in heat exchangers with a balanced heat capacity rate ratio ( C * = 1) and minimum in evaporators and condensers ( C * = 0).","PeriodicalId":153520,"journal":{"name":"Energy and Sustainability VIII","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134486495","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}

引用次数: 2

DISTANCE MEASURES FROM REPLICATOR SYSTEMS WITH NONLINEAR PAIRWISE INTERACTIONS FOR ENVIRONMENTAL RISK MANAGEMENT 具有非线性两两相互作用的复制系统的距离测量用于环境风险管理

Energy and Sustainability VIII Pub Date : 2019-09-10 DOI: 10.2495/ESUS190151

Y. Pykh, I. Malkina-Pykh

{"title":"DISTANCE MEASURES FROM REPLICATOR SYSTEMS WITH NONLINEAR PAIRWISE INTERACTIONS FOR ENVIRONMENTAL RISK MANAGEMENT","authors":"Y. Pykh, I. Malkina-Pykh","doi":"10.2495/ESUS190151","DOIUrl":"https://doi.org/10.2495/ESUS190151","url":null,"abstract":"Replicator dynamics is an evolutionary strategy well established in different disciplines of environmental sciences. It describes the evolution of self-reproducing entities called replicators in various independent models of, for example, genetics, ecology, prebiotic evolution, and socio-biology. So, the replicator systems arise in an extraordinary variety of ecosystem modelling situations. In this report we combine the three universalisms in modelling: nonlinear pairwise interactions concept, dynamical systems theory and generalized relative entropy as a distance measure for environmental risk management. We introduce two hypotheses concerning the structure and types of properties of the system’s entities’ nonlinear interactions and derive generalized replicator dynamic equations. If there exists a nontrivial equilibrium point for a generalized replicator system then we construct an entropy-like Lyapunov-Meyer function (LMF) for this system and prove that it is a relative entropy function or the function of information divergence. We have proven that negative relative entropy is a convex function for a probability space and receive new distance measures (divergence) between two probability distributions. In conclusion, we show, as an example, that relative entropy as distance measures may be used as sustainability indicators for estimating the efficiency energy use of wastewater treatment. These results allow us to suggest that these new distance measures can be applicable to a wide set of real environmental situations.","PeriodicalId":153520,"journal":{"name":"Energy and Sustainability VIII","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116526657","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}

引用次数: 1

COMPARATIVE STUDY OF TWO TYPES OF MEDIUM TEMPERATURE PHASE CHANGE MATERIALS 两种中温相变材料的比较研究

Energy and Sustainability VIII Pub Date : 2019-09-10 DOI: 10.2495/ESUS190041

Sol-Carolina Costa, M. Ismail, M. Kenisarin, K. Mahkamov, D. Mullen, E. Halimic, K. Lynn

引用次数: 3

ENERGY TRANSITION: EMBODIED ENERGY IN CLEAN TECHNOLOGIES AND THE NEED FOR INTERNATIONAL REGULATORY PROACTIVITY 能源转型:清洁技术中蕴含的能源以及国际监管主动的必要性

Energy and Sustainability VIII Pub Date : 2019-09-10 DOI: 10.2495/ESUS190011

Magnus C. Abraham‐Dukuma

引用次数: 1