scholarly journals Natural selection on thermal performance in a novel thermal environment

2014 ◽  
Vol 111 (39) ◽  
pp. 14165-14169 ◽  
Author(s):  
Michael L. Logan ◽  
Robert M. Cox ◽  
Ryan Calsbeek
Keyword(s):  
Natural Selection ◽  
Thermal Performance ◽  
Thermal Environment

Study on the Thermal Performance of the Vernacular Dwellings in Wei-He Plain of Shaanxi Province

2012 ◽  
Vol 476-478 ◽  
pp. 1589-1595
Author(s):  
Yi Ping Zhu ◽  
Xi Liao ◽  
Shu Yun Wu ◽  
Jing Luo ◽  
Yuan Jiang ◽  
...  
Keyword(s):  
Energy Saving ◽  
Thermal Insulation ◽  
Thermal Performance ◽  
Thermal Environment ◽  
Local Area ◽  
Shaanxi Province ◽  
Indoor Thermal Environment ◽  
Questionnaire Surveys

Based on indoor thermal environment test and questionnaire surveys, the paper studies on thermal insulation capacity and indoor thermal environment of the vernacular dwellings in Wei-he Plain of Shaanxi Province, China, and analyses their heating methods and application status. Besides, the popularity of sustainable techniques in local area has been evaluated and summarized. Moreover, the paper discusses the present problems in local indoor thermal environment and energy-saving status.

scholarly journals The Thermal Performance of Traditional Residential Buildings in Kathmandu Valley

2014 ◽  
Vol 10 (1) ◽  
pp. 172-183 ◽  
Author(s):  
Sushil B. Bajracharya
Keyword(s):  
Thermal Performance ◽  
Field Data ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Residential Building ◽  
Kathmandu Valley ◽  
Indoor Thermal Environment ◽  
Outdoor Thermal Environment ◽  
Different Seasons ◽  
Better Than

This paper seeks to investigate into the aspects of thermal performance of traditional residential buildings in traditional settlements of Kathmandu valley. This study proceeds to analyze the detailed field data collected, with a view to identify the indoor thermal environment with respect to outdoor thermal environment in different seasons. This paper also compares the thermal performance of traditional buildings with modern residential buildings of traditional settlements of the valley. There is a regression analysis to obtain information about the thermal environment of different traditional and modern residential buildings with different conditions. The paper concludes that, thermal performance of traditional residential building, adapted in various ways to the changing thermal regime for thermal comfort is better than that of contemporary buildings.DOI: http://dx.doi.org/10.3126/jie.v10i1.10898Journal of the Institute of Engineering, Vol. 10, No. 1, 2014,  pp. 172–183

scholarly journals Simulation and experimental study of phase change cooling and heating wall radiation air conditioning system

2020 ◽  
Vol 143 ◽  
pp. 02044
Author(s):  
Gao Chunxue ◽  
Wu Songlin ◽  
Lang Junqian ◽  
Liu Qiuxin
Keyword(s):  
Phase Change ◽  
Thermal Performance ◽  
Air Conditioning ◽  
Field Experiments ◽  
Thermal Environment ◽  
Operating Conditions ◽  
Operation Condition ◽  
Heating Wall ◽  
Air Conditioning System ◽  
Winter Operation

This paper presents a case study of phase change cooling and heating wall radiant (PC-CHWR) air conditioning system application in an energy-saving renovation project in a laboratory in Wuhan, Hubei province in China. To test the thermal performance of the system, the PHOENICS software was utilized to simulate and analyse the indoor thermal environment in the laboratory under both winter and summer operating conditions. In addition, field experiments were also conducted under winter operation condition. By comparing the results between numerical simulation and field experiment, it is found that thermal performance of the PC-CHWR air conditioning system evaluated by these two evaluation methods are quite match. Moreover, the results also show that the PC-CHWR system can meet the cooling and heating load of the building within the acceptable range.

scholarly journals Environment and phenology shape local adaptation in thermal performance

2021 ◽  
Vol 288 (1955) ◽  
pp. 20210741
Author(s):  
Andrew R. Villeneuve ◽  
Lisa M. Komoroske ◽  
Brian S. Cheng
Keyword(s):  
Climate Change ◽  
Local Adaptation ◽  
Thermal Performance ◽  
Time Series Data ◽  
Thermal Environment ◽  
Common Garden ◽  
Series Data ◽  
Urosalpinx Cinerea ◽  
The Pacific ◽  
Common Garden Experiments

Populations within species often exhibit variation in traits that reflect local adaptation and further shape existing adaptive potential for species to respond to climate change. However, our mechanistic understanding of how the environment shapes trait variation remains poor. Here, we used common garden experiments to quantify thermal performance in eight populations of the marine snail Urosalpinx cinerea across thermal gradients on the Atlantic and the Pacific coasts of North America. We then evaluated the relationship between thermal performance and environmental metrics derived from time-series data. Our results reveal a novel pattern of ‘mixed’ trait performance adaptation, where thermal optima were positively correlated with spawning temperature (cogradient variation), while maximum trait performance was negatively correlated with season length (countergradient variation). This counterintuitive pattern probably arises because of phenological shifts in the spawning season, whereby ‘cold’ populations delay spawning until later in the year when temperatures are warmer compared to ‘warm’ populations that spawn earlier in the year when temperatures are cooler. Our results show that variation in thermal performance can be shaped by multiple facets of the environment and are linked to organismal phenology and natural history. Understanding the impacts of climate change on organisms, therefore, requires the knowledge of how climate change will alter different aspects of the thermal environment.

scholarly journals Thermal Comfort Analysis of Combined Radiation-Convection Floor Heating System

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1420 ◽  
Author(s):  
Beungyong Park ◽  
Seong Ryong Ryu ◽  
Chang Heon Cheong
Keyword(s):  
Energy Consumption ◽  
Thermal Performance ◽  
Thermal Environment ◽  
Heating System ◽  
Hot Water ◽  
Pump System ◽  
Heat Pump System ◽  
Convection Heating ◽  
The Difference ◽  
Floor Heating

In this paper, a novel combined radiation-convection floor heating system is shown. This study uses practice-based learning and investigated the thermal performance of a combined radiation-convection floor heating system with a water heat pump system by evaluating the thermal environment and energy consumption in an experimental test. A new method that analyzed the thermal performance of four different controls was developed and applied. The results of the surface temperature distributions demonstrated that Mode 1, which uses only convection, had the lowest floor temperature and was thus considered inappropriate for occupants who sleep on the floor. By contrast, Modes 2, 3, and 4 showed high floor surface temperatures as hot water was supplied to the radiant heating panel. The predicted mean vote (PMV) results suggest that radiant floor heating is not appropriate for intermittent heating. In other words, occupants of single residences who return home at night will experience a long period of discomfort if they heat their room using floor heating. In this case, Mode 1, which is convection heating, and Modes 3 and 4, which represent mixed modes provide a more comfortable environment. The difference between this experimental study and previous research is that four different control modes for a combined radiation-convection system were evaluated based on the same location of the equipment in a laboratory. Furthermore, we studied the long-term real-scale thermal performance using panel and energy consumption.

Dynamic Simulation of Thermal Environment of Solar Greenhouse Using State-Space Method

2014 ◽  
Vol 525 ◽  
pp. 531-535
Author(s):  
Jian Jun Du ◽  
Xin Yu Guo ◽  
Jian Wei Wu ◽  
Bao Zhu Yang
Keyword(s):  
State Space ◽  
Dynamic Simulation ◽  
Thermal Performance ◽  
Thermal Environment ◽  
State Space Method ◽  
Ambient Conditions ◽  
Indoor Temperature ◽  
Lumped Model ◽  
Solar Greenhouse ◽  
Space Method

A dynamic simulation method of thermal environment was presented to evaluate the thermal performance of solar greenhouse. Solar greenhouse was firstly simplified into several components according to characteristics of its structure and materials, and then each component was divided into several temperature elements. For each element, heat balance equation was respectively built and integrated into a lumped model which was used to describe the thermal system of solar greenhouse. Consequently, a dynamic simulation based on state-space method was developed to calculate indoor temperature variations under the ambient conditions and structures of solar greenhouse. Experimental results show the presented method can simulate the long-term changes of indoor temperature, and are beneficial to evaluate and predict the thermal performance of solar greenhouses.

scholarly journals THERMAL PERFORMANCE TEST AND THERMAL ENVIRONMENT SURVEY OF CEILING RADIANT COOLING SYSTEM

2012 ◽  
Vol 18 (38) ◽  
pp. 243-248
Author(s):  
Sei ITO ◽  
Minoru KAWASHIMA ◽  
Yoshito ARAI ◽  
Michiya SUZUKI ◽  
Koji MURAKAMI ◽  
...  
Keyword(s):  
Thermal Performance ◽  
Performance Test ◽  
Thermal Environment ◽  
Cooling System ◽  
Radiant Cooling

scholarly journals Numerical Analysis on the Thermal Performance in an Excavating Roadway with Auxiliary Ventilation System

2021 ◽  
Vol 18 (3) ◽  
pp. 1184
Author(s):  
Zijun Li ◽  
Huasen Liu ◽  
Yu Xu ◽  
Rongrong Li ◽  
Mintao Jia ◽  
...  
Keyword(s):  
Thermal Performance ◽  
Thermal Environment ◽  
Dynamic Condition ◽  
Orthogonal Experiment ◽  
Ventilation System ◽  
Coupled Model ◽  
Local Heat ◽  
Moving Mesh Method ◽  
Heat Accumulation ◽  
Working Face

A steady and proper thermal environment in deep underground is imperative to ensure worker health and production safety. Understanding the thermal performance in the roadway is the premise of temperature prediction; ventilation design; and improvement in cooling efficiency. A full coupled model incorporated with a moving mesh method was adopted; reflecting the dynamic condition of roadway construction. This study revealed the characteristics of the thermal performance and its evolution law in an excavating roadway. Several scenarios were performed to examine the designs of the auxiliary ventilation system on thermal performance in the roadway. The results show that there is a limitation in the cooling effect by continuously increasing the ventilation volume. Reducing the diameter of the air duct or distances between the duct outlet and the working face will aggravate the heat hazard in the roadway. The heat release from the roadway wall increases with the increase of the advance rate of the working face or roadway section size. Furthermore; an orthogonal experiment was conducted to investigate the effect of major factors on the average air temperature and local heat accumulation in the roadway

scholarly journals The Impact of Vegetation on Thermal Performance

2018 ◽  
Vol 3 (11) ◽  
pp. 147
Author(s):  
Alamah Misni
Keyword(s):  
Thermal Performance ◽  
Thermal Environment ◽  
Publishing House ◽  
Landscape Design ◽  
Single Family ◽  
Different Types ◽  
International Publishing ◽  
The Impact ◽  
Family House ◽  
Open Access Article

This paper investigates the effect of vegetation in modifying outdoor temperature around a single-family house in a hot and humid tropical climate. The climatic parameters, house location, and physical characteristics of landscape design are measured and surveyed. The focus of this study is on the impact of trees and different types of foliage on the thermal environment of the houses.  The main findings are that heavily landscape around single-family houses can potentially slow heat build-up by shading, evapotranspiration, and wind channelling by as much as 4°C.Keywords: Single-family house, thermal performance, landscape design, evapotranspirationeISSN 2398-4295 © 2018. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open-access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia. http://dx.doi.org/10.21834/ajbes.v3i11.110

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