The research on the particle concentration distribution of directed airflow in cleanrooms for operators DOI Creative Commons
Chao Li, Hao Li, Minwei Zhang

и другие.

PLoS ONE, Год журнала: 2024, Номер 19(3), С. e0296803 - e0296803

Опубликована: Март 1, 2024

Existing research of non-unidirectional cleanrooms generally suggests that lower-side return air outlets provide better control effect on indoor particle concentration. As a result, there has been relatively less focus outlets. However, installing oriented towards operators as emission sources can reduce the impact process layout and improve space utilization, while also from upper workbench area. To investigate characteristics outlet for (abbreviated H ), this study compared concentration distribution, non—uniformity, purification efficiency oultet traditional L ) by experiments CFD simulations. Based theory mass conservation, expression required supply volume under equivalent cleanroom conditions was derived. Under corresponding experimental simulation conditions, differences range 2.0% to 12.7% 12.4% 33.2% , these gradually decrease with exchange rate (ACH) increases. The results show ACH = 20 is sufficient cleanliness requirements when one person in cleanroom, higher 35 needed are two persons. Although have certain potential reducing increasing remains most effective method Compared ranges non-uniformity coefficients 0.50 0.67 0.45 0.53, respectively. average coefficient differs 11.9%, not significant difference uniformity more than changes per hour. use only requires an additional 11% achieve same cleanliness, demonstrating its effectiveness controlling It suitable workbenches restricted floor usage or requiring flexible layouts. explores width sources, larger-sized facilitate discharge distribution inside room.

Язык: Английский

Improving the Indoor Air Quality of Office Buildings in the Post-Pandemic Era—Impact on Energy Consumption and Costs DOI Creative Commons
Diana D’Agostino, Federico Minelli, Francesco Minichiello

и другие.

Energies, Год журнала: 2024, Номер 17(4), С. 855 - 855

Опубликована: Фев. 12, 2024

Before the COVID-19 pandemic, ventilation in buildings was not always given its due importance. The World Health Organization has highlighted important role of air exchange with outdoors improving quality buildings; should, therefore, be equipped mechanical or adequate conditioning systems. This paper aims to investigate different retrofit solutions for conditioning, evaluating them terms energy consumption and cost impact increased outdoor rates on countering propagation COVID-19; latter is main novelty paper. As a case study, we take an existing office building located Central Italy that previously system (a primary introduced during study). analysis conducted using dynamic simulation software after validation through bills; economic analyses were considering external-air rates. An optimal number changes found mitigate risk infection, finding line international literature. increase leads rise costs. These values evaluated systems operational schedules. drawbacks can made less significant by combining interventions energy-efficiency measures applied envelope.

Язык: Английский

Процитировано

9
A New Tailored Approach to Calculate the Optimal Number of Outdoor Air Changes in School Building HVAC Systems in the Post-COVID-19 Era DOI Creative Commons
Diana D’Agostino,

Martina Di Mascolo,

Federico Minelli

и другие.

Energies, Год журнала: 2024, Номер 17(11), С. 2769 - 2769

Опубликована: Июнь 5, 2024

Air conditioning systems can play a positive or negative role in the spread of COVID-19 infection. The importance sufficient outdoor air changes buildings was highlighted by World Health Organization, therefore these should be guaranteed mechanical ventilation adequate systems. proposed case study concerns optimal number to limit contagion for school building Central Italy. Wells–Riley model is used assess risk airborne infection, while energy consumption calculated dynamic simulation software. scope paper offers an innovative method define strategy building’s HVAC system design reduce infection with limited increases and greenhouse gas emissions. Results show that desirable approach one which same low value set all rooms. This new results significant savings, compared most common ones (setting high rates rooms) counteract Finally, zero-emission target verified introducing suitable photovoltaic offset pollutant

Язык: Английский

Процитировано

9
Field questionnaire survey on thermal comfort of medical personnel in operating rooms for hospitals in Nanjing DOI
Ang Wang, Shaocong Wang, Peng Fan

и другие.

Energy and Buildings, Год журнала: 2025, Номер unknown, С. 115423 - 115423

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

1
Ventilation Improvement for Effective Protection of Healthcare Workers in Negative Pressure Airborne Infectious Isolation Room from Viral Aerosols DOI

Thanchanok Kaeophet,

Racha Dejchanchaiwong,

Perapong Tekasakul

и другие.

Building and Environment, Год журнала: 2024, Номер 259, С. 111665 - 111665

Опубликована: Май 21, 2024

Язык: Английский

Процитировано

4
Adaptive heating, ventilation, and air conditioning: energy-efficient thermal comfort for tomorrow DOI
David S.‐K. Ting,

Jacqueline Stagner

Elsevier eBooks, Год журнала: 2025, Номер unknown, С. 197 - 211

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

0
HVAC System Energy Retrofit for a University Lecture Room Considering Private and Public Interests DOI Creative Commons
Diana D’Agostino, Federico Minelli, Francesco Minichiello

и другие.

Energies, Год журнала: 2025, Номер 18(6), С. 1526 - 1526

Опубликована: Март 19, 2025

The operation of Heating Ventilation and Air Conditioning (HVAC) systems in densely occupied spaces results considerable energy consumption. In the post-pandemic context, stricter indoor air quality standards higher ventilation rates further increase demand. this paper, retrofit a partial recirculation all-air HVAC system serving university lecture room located Southern Italy is analyzed. Multi-Objective Optimization (MOO) Multi-Criteria Decision-Making (MCDM) approaches are used to find optimal design alternatives rank these considering two different decision-makers, i.e., public private stakeholders. Among Pareto solutions obtained from optimization, alternative identified, encompassing three Key Performance Indicators using new robust MCDM approach based on four methods, TOPSIS, VIKOR, WASPAS, MULTIMOORA. show that, era, baseline scenarios for infection reduction that do not involve introduction demand control strategies cause consumption negligible values up 59%. On contrary, involving decrease between 5% 38%. findings offer valuable guidance retrofits education similar buildings, emphasizing potential balance occupant health, efficiency, cost reduction. also highlight significant CO2 reductions minimal impacts thermal comfort, showcasing substantial savings through targeted retrofits.

Язык: Английский

Процитировано

0
Study on Energy Efficiency Improvement Through Multi-response Optimization in Building DOI
Monika Chaudhary,

Kartik Kumar,

Ramdutt Arya

и другие.

Lecture notes in networks and systems, Год журнала: 2025, Номер unknown, С. 189 - 203

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

0
Experimental study of thermal comfort by variable temperature and velocity air supply system in operating room DOI
Bin Zhou, Ang Wang, Hui Ren

и другие.

Building and Environment, Год журнала: 2025, Номер unknown, С. 112927 - 112927

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0
Multi-Objective Optimization of TAF Systems: Enhancing Air Cleanliness and Energy Efficiency in Surgical Environments DOI

Fandy Septian Arison,

Takashi Tokumasu,

S. Sholahudin

и другие.

Building and Environment, Год журнала: 2025, Номер unknown, С. 112977 - 112977

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0
Thermofluid dynamics and droplets transport inside a large university classroom: Effects of occupancy rate and volumetric airflow DOI Creative Commons
Andrea Carlo D’Alicandro, Alfonso Capozzoli, Alessandro Mauro

и другие.

Journal of Aerosol Science, Год журнала: 2023, Номер 175, С. 106285 - 106285

Опубликована: Окт. 14, 2023

The airborne droplets released by humans while speaking or coughing are the main sources of human-to-human contagion for transmissible diseases. Due to recent SARS-Cov2 pandemic, indoor transmission in classrooms and other environments is an interesting topic investigated scientific community. In this work, thermofluid dynamic conditions droplet transport was analysed a large University Classroom (UC), as function inlet airflow occupancy rate. These parameters assume relevant role design stage. However, their effects on were not deeply literature. Therefore, different analyzed, such as: full occupancy, which represents condition where no social distancing enforced; half representative distancing; empty UC, be considered term comparison. novelty work related analysis combined effect thermal plume UC. numerical model dynamics simulation validated previous emission retrieved from High volumetric always beneficial reduction risk. An important aspect plume, cannot ignored if rate assumes significant value. Moreover, evacuation age indicators assess cleaning time.

Язык: Английский

Процитировано

6