INDOOR THERMAL ENVIRONMENT OF TEMPORARY HOUSES BUILT AFTER GREAT EAST JAPAN EARTHQUAKE IN 2011 AND PROPOSAL OF THERMAL PERFORMANCE FOR BUILDING ENVELOPES AND MECHANICAL VENTILATION SYSTEM

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.

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The Thermal Performance of Traditional Residential Buildings in Kathmandu Valley

Journal of the Institute of Engineering ◽

10.3126/jie.v10i1.10898 ◽

2014 ◽

Vol 10 (1) ◽

pp. 172-183 ◽

Cited By ~ 5

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

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Effect of Ventilation Tube Diameter on Thermal Performance of Food Refrigerated Warehouse Floor Antifreezing Mechanical Ventilation System

Advance Journal of Food Science and Technology ◽

10.19026/ajfst.7.1316 ◽

2015 ◽

Vol 7 (5) ◽

pp. 320-325

Author(s):

Jing-fu Jia ◽

Wei He

Keyword(s):

Mechanical Ventilation ◽

Thermal Performance ◽

Ventilation System ◽

Tube Diameter ◽

Ventilation Tube

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Self-contained ventilation system of civil buildings built into window structures

MATEC Web of Conferences ◽

10.1051/matecconf/201819602007 ◽

2018 ◽

Vol 196 ◽

pp. 02007

Author(s):

Arman Kostuganov ◽

Yuri Vytchikov ◽

Andrey Prilepskiy

Keyword(s):

Mechanical Ventilation ◽

Thermal Protection ◽

Ventilation System ◽

Field Tests ◽

Building Construction ◽

Labor Input ◽

Building Envelopes ◽

Extra Space ◽

Research Stage ◽

Ventilation Systems

The article describes development and application of self-contained ventilation systems in civil buildings. It suggests several models of air exchange within the building, compares these models and points out the variant of ventilating with self-contained mechanical systems with utilization of heat. The researchers conclude that structurally self-contained systems of mechanical ventilation with utilization of heat are most efficiently built into window constructions. This installation variant makes it possible to keep the interior, avoid building construction strengthening, shorten time and labor input of construction-assembling works, allow rational use of the vertical building envelopes area without extra space using. The paper key issue is the development of constructive solutions of self-contained ventilation systems main elements to ensure the possibility of their use in window structures. This research stage was developed with account of previous results of field tests and of such ventilation systems theoretical descriptions. The authors assess limit dimensions of the systems suitable for installment into window constructions of civil buildings in the view of modern Russian requirements to thermal protection. The research suggests a general constructive solution of such a ventilation system and a heat exchanger model which can be used as an air heat utilizer in these systems.

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Evaluation of Thermal Behavior of the Skeleton in a Green Building with the Aid of TABS

E3S Web of Conferences ◽

10.1051/e3sconf/201911101085 ◽

2019 ◽

Vol 111 ◽

pp. 01085

Author(s):

Hiroshi Muramatsu ◽

Tatsuo Nobe

Keyword(s):

Heat Flux ◽

Thermal Behavior ◽

Air Conditioning ◽

Natural Ventilation ◽

Thermal Environment ◽

Concrete Slab ◽

Ventilation System ◽

Office Building ◽

Air Conditioning System ◽

Indoor Thermal Environment

In this study, an office building in Japan that incorporates energy-saving features and environmental technologies was investigated. This office building features a green façade, natural ventilation, a concrete slab with no suspended ceilings, and thermo-active building systems. Two airconditioning systems were installed in this building—a ceiling radiation air-conditioning system and a whole floor-blow off air conditioning system. In addition, a natural ventilation system was installed. We surveyed the heat flux of the ceiling surface and indoor thermal environment of this building from 2015 through 2016. The ceiling using the heat storage amount of concrete maintains a constant temperature in the workplace during as well as after office hours. We also performed detailed measurements of the heat flux of the ceiling surface and indoor thermal environment in the summer of 2017. The results showed that the ceiling radiation air-conditioning system provided a stable thermal environment. Furthermore, we report that making use of the thermal behavior of the skeleton improved the operation of the ceiling radiation airconditioning system.

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Assessment of indoor thermal environment of Aceh house based on WBGT index

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/881/1/012023 ◽

2021 ◽

Vol 881 (1) ◽

pp. 012023

Author(s):

Muslimsyah ◽

A Munir ◽

Y Away ◽

Abdullah ◽

K Huda ◽

...

Keyword(s):

Thermal Comfort ◽

Natural Ventilation ◽

Thermal Environment ◽

Ventilation System ◽

Vernacular Architecture ◽

Maximum Temperature ◽

Cooling Process ◽

Temperature Index ◽

Indoor Thermal Environment ◽

Temperature Ranges

Abstract Thermal comfort is one of the standard assessments of building thermal environment. Air movement is an important parameter for in a naturally ventilated to achieve thermal comfort by accelerating the evaporative cooling process on the human body. Aceh House has a standard of thermal comfort with a vernacular architecture with a natural ventilation system. This vernacular architectural building has a fairly high harmonization of the environment because it has undergone a process of adaptation. In this study, observations were made at the Original House (OH), the Adaptive Reuse House (ARH), and the Aceh Modified House (AMH). By using the method of assessing changes in environmental comfort, using Wet Bulb Temperature Index (WBGT) method, the minimum and maximum temperature ranges are 25°C and 30°C. In the WBGT thermal rating, AMH has the higher thermal and is followed by ARH and OH respectively. Thus, OH has lower thermal compared to other Aceh houses.

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Evaluation of Using the Ceiling and Wall Spots Ventilation System on Indoor Thermal Environment

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/881/1/012056 ◽

2020 ◽

Vol 881 ◽

pp. 012056

Author(s):

Wisam A. M. Al-Shohani ◽

Ahmed Qasim Ahmed ◽

Ahmed Jawad Khaleel ◽

Hassan J. Dakkama ◽

Tareq Hamid Fayyad

Keyword(s):

Thermal Environment ◽

Ventilation System ◽

Indoor Thermal Environment

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

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18031184 ◽

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

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Research on Indoor Thermal Comfort and Age of Air in Qilou Street Shop under Mechanical Ventilation Scheme: A Case Study of Nanning Traditional Block in Southern China

Sustainability ◽

10.3390/su13074037 ◽

2021 ◽

Vol 13 (7) ◽

pp. 4037

Author(s):

Xianfeng Huang ◽

Chen Qu

Keyword(s):

Mechanical Ventilation ◽

Air Quality ◽

Thermal Comfort ◽

Thermal Environment ◽

Southern China ◽

Air Conditioner ◽

Indoor Thermal Environment ◽

Indoor Thermal Comfort ◽

Circulation Mode ◽

Ventilation Scheme

In hot summers, air conditioning (AC) and mechanical ventilation (such as fans) are used as cooling modes that strongly influence the resultant indoor environment, like thermal comfort and air quality in the shops of a Nanning arcade street (qilou). The air circulation mode in shops greatly affects the indoor thermal environment and level of air freshness. The approaches for effectively improving the indoor thermal comfort and air quality are developed in qilou street shops with air-conditioner in a humid and hot region in southern China. Consequently, the purpose of this study is to assess different ventilation schemes in order to identify the best one. By using two indices, i.e., the predicted mean vote (PMV) and the age of air (AoA), in situ measurement and numerical simulation are conducted to investigate humans’ thermal comfort in extreme summer. Then, the indoor thermal comfort and AoA levels in summer under three different ventilation schemes (upper-inlet–upper-outlet, upper-inlet–bottom-outlet, and side-inlet–side-outlet) are comparatively analyzed through numerical computations of the indoor thermal environment. The results show that the upper-inlet–upper-outlet mode of the AC ventilation scheme led to the creation of a favorable air quality and comfortable thermal environment inside the shop, which will help designers understand the influence of the ventilation scheme on the indoor thermal comfort and health environment.

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Impact of ventilation system type on indoor thermal environment and human thermal comfort in a ceiling cooling room

Thermal Science ◽

10.2298/tsci210108277w ◽

2021 ◽

pp. 277-277

Author(s):

Xiaozhou Wu ◽

Genglin Liu ◽

Jie Gao ◽

Shuang Wu

Keyword(s):

Thermal Comfort ◽

Air Temperature ◽

Thermal Environment ◽

Thermal Sensation ◽

Ventilation System ◽

Physical Parameters ◽

Curtain Wall ◽

Indoor Thermal Environment ◽

Human Thermal Comfort ◽

System Type

A ceiling cooling (CC) system integrated with a mechanical ventilation system is an advanced HVAC system for the modern office building with glass curtain wall. In this paper, considering the influence of heat transfer of external envelope, the indoor thermal environment and human thermal comfort were objectively measured and subjectively evaluated in a ceiling cooling room with mixing ventilation (MV) or underfloor air distribution (UFAD). Indoor physical parameters and human skin temperatures were measured as the chilled ceiling surface temperature and supply air temperature were 17.1?C-17.6?C and 22.2?C - 22.6?C. Simultaneously, 16 subjects (8 males and 8 females) were selected to subjectively evaluate the thermal environment. The results showed that the difference between mean radiant temperature and air temperature in the occupied zone was 0.8?C with CC+MV and 1.2?C with CC+UFAD, and the indoor air velocity was 0.17m/s with CC+MV and 0.13m/s with CC+UFAD. In addition, the calculated and measured thermal sensation votes with CC+MV were all slightly less than those with CC+UFAD. Therefore, ventilation system type had a slight impact on the indoor thermal environment and human thermal comfort in the ceiling cooling room.

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