Research on thermal comfort and energy efficiency in office buildings with high window-to-wall ratios: a case study in Qingdao DOI Creative Commons
Weihao Hao,

Dong-Wook Sohn

International Journal of Low-Carbon Technologies, Journal Year: 2024, Volume and Issue: 19, P. 2309 - 2327

Published: Jan. 1, 2024

Abstract High window-to-wall ratios (WWRs) are commonly used in office buildings, yet their effects on thermal comfort and energy consumption not fully understood. This study uses TRNSYS software to analyze the environment of buildings with varying WWRs (0%–100%) Qingdao. The findings show that as increase, average monthly maximum temperatures (Tmax) rise between 1.33°C 5.62°C. Middle floors (F2–F3) consistently warmer than ground (F1) top (F4). In summer, higher (>60%) significantly reduce prevalence extremely high (>37°C) by 0.64% 11.29%. also improve nocturnal heat dissipation, increasing percentage within range reducing heating loads 0.62% 1.08%. Implementing shading facilities during summer further enhances efficiency WWRs.

Language: Английский

The effect of classroom size and ceiling height on college students’ learning performance using virtual reality technology DOI Creative Commons
Yalin Zhang, Chao Liu, Jiaxin Li

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: July 3, 2024

The physical characteristics of classrooms can significantly impact the and mental health as well learning performance college students. This study investigates effects classroom size ceiling height on using virtual reality technology. Four settings were created: two small (40.5 m

Language: Английский

Citations

5
Impact of visual and textural characteristics of street walls on stress recovery DOI Creative Commons
Nan Zhang, Lin Zhao, Shi Jin

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: July 2, 2024

Abstract Rapid urbanization increases psychological stress among pedestrians, potentially heightening mental health disorders. This study examines the role of street walls' visual and textural characteristics in recovery, using Qingdao as a case study. Virtual reality is employed to simulate five distinct walls: yellow mortar, brown stone, red brick, green plant, white mortar. The recovery effectiveness these walls was evaluated through physiological indicators from 48 young college students. Results indicated that with warm tones, particularly significantly aid recovery. Psychologically, Restorative Components Scale highest for stone at 1.13. Physiologically, it linked notable reductions diastolic pulse pressure (decreases 2.95 mmHg 2.27 mmHg, respectively), enhanced parasympathetic activity, evidenced by fastest decrease low frequency/high frequency ratio (LF/HF), pNN50 RR (0.14–2.01% 1.57–11.81 ms, respectively). For urban design, incorporation warm-toned materials natural elements like recommended their superior restorative benefits.

Language: Английский

Citations

4
Effects of Traffic Noise on the Psychophysiological Responses of College Students: An EEG Study DOI
Nan Zhang, Chao Liu, Menglin Zhang

et al.

Building and Environment, Journal Year: 2024, Volume and Issue: 267, P. 112171 - 112171

Published: Oct. 9, 2024

Language: Английский

Citations

4
The effect of the preferred illuminance on dynamic features of the brain activity during reading DOI
Jing Shi, Nan Zhang, Wenhao Wang

et al.

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: 103, P. 112064 - 112064

Published: Feb. 7, 2025

Language: Английский

Citations

0
Effects of Plant Aromas on Stress Recovery and Brain Activity in University Students DOI
Nan Zhang, Chao Liu,

Yuying Ren

et al.

Building and Environment, Journal Year: 2025, Volume and Issue: unknown, P. 112716 - 112716

Published: Feb. 1, 2025

Language: Английский

Citations

0
Effects of spring water sounds on psychophysiological responses in college Students: An EEG study DOI
Nan Zhang, Yuqin Zhang,

Fengcheng Jiao

et al.

Applied Acoustics, Journal Year: 2024, Volume and Issue: 228, P. 110318 - 110318

Published: Oct. 10, 2024

Language: Английский

Citations

3
A Spiropyran-Based Hydrogel Composite for Wearable Detectors to Monitor Visible Light Intensity to Prevent Myopia DOI Creative Commons
Jiaxin Zhang, Manman Lu, Xin Cai

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

A wearable detector to monitor visible light intensity is realized by the restrained photochromism of a hydrogel composite containing light-responsive spiropyran with hydroxyl groups (SPOH). When exposed light, SPOH experiences ring-opening ring-closed transition accompanied discoloration from red yellow. Unlike in solution, photochromism/discoloration rate strongly correlated cross-linking points. By reducing amount cross-linker 40 5 mg, 300% faster. Inspired Chinese Jade Loong Hongshan, shaped into intensity. increasing head, body, and tail, sequentially turns slower one region other. Higher required realize larger cross-linker. Because initial colors are identical, can be easily traced checking these pieces different amounts Based on this unique reversible photochromic capability, present used for monitoring prevent myopia, especially children students.

Language: Английский

Citations

0
Investigating the impact of street width-to-height ratios on stress recovery DOI
Nan Zhang,

Lin Zhao,

Genzheng Guan

et al.

Indoor and Built Environment, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

The rapid urbanization has heightened psychological pressure on pedestrians, leading to a rise in mental health disorders. Given the significance of street spaces as crucial public domains daily life, they offer potential strategy for reducing stress and promoting general wellness. This study aimed investigate effects width-to-height ratio ( W / H ) recovery, using virtual reality technology create five scenes with distinct ratios: 0.5, 1.0, 1.5, 2.0 4.0. investigation encompassed physiological indicators 48 participants. findings demonstrated that streets ratios ranging from 1.0 were perceived more conducive recovery. Subjectively, such received elevated Restorative Components Scale scores, 0.89 1.03. Moreover, revealed significant reduction pulse (0.07–0.86 mm Hg). lower LF/HF (0.75–1.0) indicates dominance parasympathetic nervous system (PNS). is further supported by higher pNN50 (16.72–16.97%) associated PNS activation longer RR (the time between two consecutive R-peaks, 768.60–773.10 ms), reflecting stress. Extreme function fitting analysis = 1.25 exhibited most substantial recovery effect amongst various configurations tested.

Language: Английский

Citations

0
Effects of Window Green View Index on Stress Recovery of College Students from Psychological and Physiological Aspects DOI Creative Commons

Xiaotong Jing,

Chao Liu, Jiaxin Li

et al.

Buildings, Journal Year: 2024, Volume and Issue: 14(10), P. 3316 - 3316

Published: Oct. 21, 2024

Students often experience high levels of daily academic pressure, spending extended periods within indoor classroom environments. Windows, as a medium proximity to nature, play an important role in relieving stress. However, the broader implications Window Green View Index (WGVI) on individual well-being remain underexplored. This study aims assess effects WGVI stress recovery college students by utilizing virtual reality technology create five environments with varying levels: 0%, 25%, 50%, 75%, and 100%. Twenty-four participants were subjected Trier Social Stress Test before engaging different scenarios for recovery. Both subjective assessments objective physiological indicators evaluated. Results indicated that exhibited lowest Profile Mood States (POMS) score (−4.50) significantly improved systolic blood pressure at 25% level. The examination EEG data revealed O2 channel occipital region highest level activity alpha frequency range during experiment. Additionally, significant association was observed between measurements rating underscores significance incorporating into design planning buildings promote mental health among students.

Language: Английский

Citations

2
Research on thermal comfort and energy efficiency in office buildings with high window-to-wall ratios: a case study in Qingdao DOI Creative Commons
Weihao Hao,

Dong-Wook Sohn

International Journal of Low-Carbon Technologies, Journal Year: 2024, Volume and Issue: 19, P. 2309 - 2327

Published: Jan. 1, 2024

Abstract High window-to-wall ratios (WWRs) are commonly used in office buildings, yet their effects on thermal comfort and energy consumption not fully understood. This study uses TRNSYS software to analyze the environment of buildings with varying WWRs (0%–100%) Qingdao. The findings show that as increase, average monthly maximum temperatures (Tmax) rise between 1.33°C 5.62°C. Middle floors (F2–F3) consistently warmer than ground (F1) top (F4). In summer, higher (>60%) significantly reduce prevalence extremely high (>37°C) by 0.64% 11.29%. also improve nocturnal heat dissipation, increasing percentage within range reducing heating loads 0.62% 1.08%. Implementing shading facilities during summer further enhances efficiency WWRs.

Language: Английский

Citations

0