Study on energy-saving thermal environment of residential envelope reconstruction based on ECOTECT

2021 ◽  
Author(s):  
Yin Zhang
Keyword(s):  
Energy Saving ◽  
Thermal Environment ◽  
Envelope Reconstruction

scholarly journals Improvements in Energy Saving and Thermal Environment after Retrofitting with Interior Insulation in Intermittently Cooled Residences in Hot-Summer/Cold-Winter Zone of China: A Case Study in Chengdu

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2776
Author(s):  
Xin Ye ◽  
Jun Lu ◽  
Tao Zhang ◽  
Yupeng Wang ◽  
Hiroatsu Fukuda
Keyword(s):  
Energy Saving ◽  
Thermal Environment ◽  
Real Life ◽  
Average Energy ◽  
Experimental Result ◽  
Cold Winter ◽  
The South ◽  
Indoor Thermal Environment ◽  
Space Cooling

Space cooling is currently the fastest-growing end-user in buildings. The global warming trend combined with increased population and economic development will lead to accelerated growth in space cooling in the future, especially in China. The hot summer and cold winter (HSCW) zone is the most densely populated and economically developed region in China, but with the worst indoor thermal environment. Relatively few studies have been conducted on the actual measurements in the optimization of insulation design under typical intermittent cooling modes in this region. This case study was conducted in Chengdu—the two residences selected were identical in design, but the south bedroom of the case study residence had interior insulation (inside insulation on all opaque interior surfaces of a space) retrofitted in the bedroom area in 2017. In August 2019, a comparative on-site measurement was done to investigate the effect of the retrofit work under three typical intermittent cooling patterns in the real-life scenario. The experimental result shows that interior insulation provides a significant improvement in energy-saving and the indoor thermal environment. The average energy savings in daily cooling energy consumption of the south bedroom is 42.09%, with the maximum reaching 48.91%. In the bedroom with interior insulation retrofit, the indoor temperature is closer to the set temperature and the vertical temperature difference is smaller during the cooling period; when the air conditioner is off, the room remains a comfortable temperature for a slightly longer time.

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 Field Study Of A Radiant Heating System For Sleep Thermal Comfort And Potential Energy Saving

2021 ◽  
Author(s):  
Christopher L. K. Wang
Keyword(s):  
Potential Energy ◽  
Thermal Comfort ◽  
Energy Saving ◽  
Energy Savings ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Thermal Conditions ◽  
Heating System ◽  
The Body ◽  
Radiant Temperature

As sleep is unconscious, the traditional definition of thermal comfort with conscious judgment does not apply. In this thesis sleep thermal comfort is defined as the thermal condition which enables sleep to most efficiently rejuvenate the body and mind. A comfort model was developed to stimulate the respective thermal environment required to achieve the desired body thermal conditions and a new infrared sphere method was developed to measure mean radiant temperature. Existing heating conditions according to building code conditions during sleeping hours was calculated to likely overheat a sleeping person and allowed energy saving potential by reducing nighttime heating set points. Experimenting with existing radiantly and forced air heated residential buildings, it was confirmed that thermal environment was too hot for comfortable sleep and that the infrared sphere method shows promise. With the site data, potential energy savings were calculated and around 10% of energy consumption reduction may be achieved during peak heating.

Application of Thermal Priority Strategy in Energy-Saving Optimization Design of Low-Cost Rural Residence

2012 ◽  
Vol 238 ◽  
pp. 473-477
Author(s):  
Mei Jun Lu ◽  
Zhi Feng Zheng
Keyword(s):  
Energy Saving ◽  
Optimization Design ◽  
Thermal Environment ◽  
Low Cost ◽  
Rural Residence ◽  
Shape Coefficient ◽  
Technical Performance ◽  
Rural Residences ◽  
Plane Grid ◽  
Selection Of

In order to improve the indoor thermal environment of rural residences, on the basis of meeting the requirements of functionality, living habits and certain architectural modeling, the thermal priority strategy is put forward into the design. Aiming at the low cost, from the perspective of building layout and architectural monomer design, the thermal priority strategy is applied to energy saving design for rural residence to get the effective and reasonable comfort-type rural energy efficiency residence. Specific measures are adopted such as the selection of sunny and sheltered sites in north-south direction, the courtyard and main entrance location in south or south-east side to form the layout opening from east to west, the technical performance with low shape coefficient and energy-saving shape and taking solar radiation into account, and the reasonably settings of climate buffer layer, thermal comfort zone, plane grid, doors and windows.

Comprehensive Evaluation Method Study of University Town Ecological Physical Environment (UTEPE)

2011 ◽  
Vol 374-377 ◽  
pp. 2388-2392
Author(s):  
Bo Wang
Keyword(s):  
Energy Saving ◽  
Physical Environment ◽  
Evaluation Method ◽  
Thermal Environment ◽  
Comprehensive Evaluation ◽  
Construction Materials ◽  
Impact Factors ◽  
Sound Environment ◽  
University Town ◽  
The Impact

The premise that analyzing and studying the factors that effect university town ecological physical environment (UTEPE), UTEPE impact factors are the thermal environment, sound environment, light environment, eco-energy saving design. This paper establishes the evaluation method for UTEPE which is based on fuzzy math. We evaluate the quality of UTEPE comprehensively in this way. Renewable energy, nontraditional water source, green construction materials, water-saving appliances, energy-saving lamps, bicycle & public traffic system are very important for creating good quality physical environment in university town. In this paper, according to the impact factors of the UTEPE and using the fuzzy mathematical theory on evaluating the UTEPE comprehensively can reflect the real situation more objectively and accurately. The construction of model is simple and practical. Comprehensive evaluation utilizes the combination of the general public survey and expert evaluation, which benefits to reflect the democratic spirit. It also provides the reference to improve the UTEPE.

scholarly journals Building a non-homogeneous environment for high effective cooling in the face of deep mines

2020 ◽  
Author(s):  
Xian Li ◽  
Houli Fu
Keyword(s):  
Energy Saving ◽  
Thermal Environment ◽  
Average Energy ◽  
Air Distribution ◽  
Air Cooling ◽  
Cooling Load ◽  
Cooling Strategy ◽  
The Face ◽  
Air Cooler ◽  
Homogeneous Environment

Abstract Heat exhaustion of mining environments can cause a great threat to human health. The existing cooling strategies for the mine face aim to cool the whole face. However, the area of effective air-cooling space for the face is small, and a great amount of energy for cooling is ineffective. Effective air-cooling space is a space occupied by the workers in the face. This study proposed to build a non-homogeneous environment for high effective cooling in the face. An inlet air cooler was laid out in the intake airway to cool the whole face to some extent, and the tracking air cooler was designed to track the worker who constantly moved to improve the thermal environment. The cooling load and air distribution for this cooling strategy were investigated. In addition, the airflow in the face was numerically solved to estimate the cooling effect. The results revealed that an average energy saving of approximately 35% could be achieved. The thermal environment of the effective air-cooling space within at least 10 m was significantly improved. This cooling strategy should be taken into account in mine cooling.

Evaluating Thermal Environments by Using an Air-Conditioning Energy-Saving Mechanism

2012 ◽  
Author(s):  
Nguyen Anh Tuan ◽  
K. D. Huang
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Energy Use ◽  
Thermal Environment ◽  
Minimum Energy ◽  
Outlet Port ◽  
Thermal Environments ◽  
Environment Control ◽  
Port Opening ◽  
Occupied Zone

In a highly developed living, people are always looking for a comfortable indoor environment with minimum energy use. Individual air-conditioning system (IACS) can create an individual thermal environment control in a workroom which can contribute to save air-conditioning energy. In this study, we analyze the airflow circulation cell of the IACS with varied outlet port opening and outlet port position dimensions using the computational fluid dynamics (CFD) technique. We created an IACS, two workstations, lightings, and a cabinet in a 3-dimensional room. The fluid was assumed to be Newtonian, unsteady, and incompressible. A Bossinesq approximation was determined in order to consider the buoyancy effect. We examined the effects of the outlet port opening and outlet port position on airflow circulation establishing process. Air temperatures along the various midline of the occupied zone were predicted and compared for a range of outlet port opening and outlet port position by using non-dimensional form. We also showed the occupied zone temperature at various planes in the workroom. Results will indicate the suitable outlet port opening and outlet port position for maintaining individual satisfied occupants’ requirements and improving energy saving potential.

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