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1. Experiments and simulations of human walking-induced particulate matter resuspension in indoor environments

Author:
Wang, Baoqing; Tang, Zhenzhen; Li, Yinuo; Cai, Ningning; Hu, Xinxin
Source:
Journal of cleaner production 2021 v.295 pp. 126488
ISSN:
0959-6526
Subject:
air conditioning,   etc   ; air flow; dust; human health; humans; models; particulates; people; pollution; quantitative analysis;     Show all 10 Subjects
Abstract:
... A clean indoor environment, which is essential for human health, can be achieved by reducing PM₂.₅ pollution from indoor ground fugitive dust. This study quantifies different indoor PM₂.₅ dust loads and the human walking-induced indoor PM₂.₅ resuspension for different cumulative times, and investigates the indoor PM₂.₅ pollution caused by indoor floor dust using experiments and simulations. The co ...
DOI:
10.1016/j.jclepro.2021.126488

2. Competing Effects between Condensation and Self-Removal of Water Droplets Determine Antifrosting Performance of Superhydrophobic Surfaces

Author:
Zhao, Guanlei; Zou, Guisheng; Wang, Wengan; Geng, Ruikun; Yan, Xiao; He, Zhiyuan; Liu, Lei; Zhou, Xin; Lv, Jianyong; Wang, Jianjun
Source:
ACS applied materials & interfaces 2020 v.12 no.6 pp. 7805-7814
ISSN:
1944-8252
Subject:
air conditioning,   etc   ; droplets; equipment; hydrophobicity; refrigeration; water;     Show all 6 Subjects
Abstract:
... Preventing condensation frosting is crucial for air conditioning units, refrigeration systems, and other cryogenic equipment. Coalescence-induced self-propelled jumping of condensed microdroplets on superhydrophobic surfaces serves as a favorable strategy against condensation frosting. In previous reports, efforts were dedicated to enhance the efficiency of self-propelled jumping by constructing a ...
DOI:
10.1021/acsami.9b21704

3. Direct relationship between the system cooling load and indoor heat gain in a non-uniform indoor environment

Author:
Liang, Chao; Li, Xianting; Shao, Xiaoliang; Li, Baoming
Source:
Energy 2020 v.191 pp. 116490
ISSN:
0360-5442
Subject:
air conditioning,   etc   ; buildings; cooling; heat; prediction;     Show all 5 Subjects
Abstract:
... An accurate assessment of the system cooling load (SCL) is crucial in sizing air-conditioning systems for buildings. However, there is no explicit relationship between the SCL and heat gain in non-uniform indoor environments oriented to local requirements. To address this issue, a direct relationship between them was derived theoretically based on the average accessibility of heat sources, which q ...
DOI:
10.1016/j.energy.2019.116490

4. Economic analysis of a novel solar-assisted air conditioning system with integral absorption energy storage

Author:
Ibrahim, Nasiru I.; Al-Sulaiman, Fahad A.; Rehman, Shafiqur; Saat, Aminuddin; Ani, Farid Nasir
Source:
Journal of cleaner production 2021 v.291 pp. 125918
ISSN:
0959-6526
Subject:
air conditioning,   etc   ; absorption; cooling systems; economic feasibility; economic performance; energy; energy conservation; paper; solar collectors; solar radiation; storage; Saudi Arabia;     Show all 12 Subjects
Abstract:
... The application of solar cooling systems is directly linked to the availability of solar radiation. Consequently, energy storage is important to achieve extended cooling coverage. This paper presents the economic performance evaluation of a novel solar-assisted absorption air conditioning system integrated with absorption energy storage (AES). The proposed solar-assisted air conditioning system co ...
DOI:
10.1016/j.jclepro.2021.125918

5. Forecast of future yield for printed circuit board resin waste generated from major household electrical and electronic equipment in China

Author:
Zhang, Shuhao; Gu, Yifan; Tang, Aijun; Li, Bohan; Li, Bin; Pan, Dean; Wu, Yufeng
Source:
Journal of cleaner production 2021 v.283 pp. 124575
ISSN:
0959-6526
Subject:
air conditioning,   etc   ; copper; design; electronic equipment; estimation; gold; lifestyle; models; paper; public policy; research; washing; waste management; wastes; China;     Show all 15 Subjects
Abstract:
... As the biggest generator and consumer of household electrical and electronic equipment (EEE) in the world, China generates a large amount of printed circuit board (PCB) resin waste during the production and scrap disposal processes of household EEE each year, yet the precise estimation of the PCB resin waste generation in China is still to be determined. In this paper, the stock-based model is app ...
DOI:
10.1016/j.jclepro.2020.124575

6. Consumer behaviour and climate action: insights from a Randomised Control Trial experiment in India's residential cooling sector

Author:
Chaturvedi, Vaibhav; Gorthi, Apurupa; Bhasin, Shikha; Laha, Arnab
Source:
Heliyon 2021 v.7 no.1 pp. e05749
ISSN:
2405-8440
Subject:
air conditioning,   etc   ; asymmetry; behavior change; climate; climate change; consumer behavior; cooling; energy; financial economics; markets; surveys; India;     Show all 12 Subjects
Abstract:
... Air-conditioning is expected to be the largest consumer of residential energy in India in the future. Good consumer practices related to servicing air-conditioners (ACs) are critical for maintaining high operational efficiency of ACs and reducing leakages of high global warming potential (GWP) refrigerant gases. Little information, however, is available about the knowledge and practices of Indian ...
DOI:
10.1016/j.heliyon.2020.e05749

7. An agent-based distributed real-time optimal control strategy for building HVAC systems for applications in the context of future IoT-based smart sensor networks

Author:
Su, Bing; Wang, Shengwei
Source:
Applied energy 2020 v.274 pp. 115322
ISSN:
0306-2619
Subject:
air conditioning,   etc   ; automation; controllers; energy; heating systems; ventilation systems;     Show all 6 Subjects
Abstract:
... Existing studies on distributed optimal control of HVAC systems rarely consider the needs and constraints for practical applications and the deployment of control strategies on the physical building automation platforms. This paper proposes an agent-based distributed real-time control strategy for building HVAC systems with the objective to be deployed in the local control devices with limited pro ...
DOI:
10.1016/j.apenergy.2020.115322

8. Modelling dispersion of radioactive aerosols and occupational dose assessment of workers in a large nuclear plant industrial workshop with a stratified air conditioning system

Author:
Xie, Dong; Wang, Chenhua; Ding, Wei; Wang, Hanqing
Source:
Environmental technology & innovation 2020 v.19 pp. 100828
ISSN:
2352-1864
Subject:
air conditioning,   etc   ; aerosols; air; air flow; mathematical models; pollution;     Show all 6 Subjects
Abstract:
... Numerical simulations of radioactive aerosols dispersion were conducted to determine the potential radiation hazard on occupants due to radioactive aerosols emitted from the workbench in a large nuclear plant industrial workshop with a stratified air conditioning system. Different air organization schemes were evaluated based on the position of the workbench under the initial, mainstream and end l ...
DOI:
10.1016/j.eti.2020.100828

9. PM2.5 exposure of various microenvironments in a community: Characteristics and applications

Author:
Hsu, Wei-Ting; Chen, Jyh-Larng; Candice Lung, Shih-Chun; Chen, Yu-Cheng
Source:
Environmental pollution 2020 v.263 pp. 114522
ISSN:
0269-7491
Subject:
air conditioning,   etc   ; college students; exposure models; markets; monitoring; particulates; prediction;     Show all 7 Subjects
Abstract:
... While the measurement of particulate matter (PM) with a diameter of less than 2.5 μm (PM₂.₅) has been conducted for personal exposure assessment, it remains unclear how models that integrate microenvironmental levels with resolved activity and location information predict personal exposure to PM. We comprehensively investigated PM₂.₅ concentrations in various microenvironments and estimated person ...
DOI:
10.1016/j.envpol.2020.114522

10. Experimental study on the dynamics, quality and impacts of using variable-speed pumps in buildings for frequency regulation of smart power grids

Author:
Wang, Huilong; Wang, Shengwei; Shan, Kui
Source:
Energy 2020 v.199 pp. 117406
ISSN:
0360-5442
Subject:
air conditioning,   etc   ; air temperature; buildings; heating systems; pumps; ventilation systems;     Show all 6 Subjects
Abstract:
... The increased generation of renewable power is challenging in terms of the power balance and reliability of power grids due to the intermittent nature of renewable sources. Heating, ventilation, and air-conditioning (HVAC) systems in buildings, at demand side, are promising candidates for providing frequency regulation. In this study, we systematically assessed the use of variable-speed pumps in H ...
DOI:
10.1016/j.energy.2020.117406

11. Standard effective temperature based adaptive-rational thermal comfort model

Author:
Zhang, Sheng; Lin, Zhang
Source:
Applied energy 2020 v.264 pp. 114723
ISSN:
0306-2619
Subject:
air conditioning,   etc   ; buildings; case studies; energy; models; prediction; sensation; temperature;     Show all 8 Subjects
Abstract:
... Thermal adaptations mitigate thermal discomfort and thereby reducing building energy consumption. Adaptive-rational thermal comfort modelling modifies the rational model using the adaptive approach to enable the rational model to fully account for the thermal adaptations for improved thermal comfort prediction. However, the applicability of the adaptive-rational thermal comfort modelling has only ...
DOI:
10.1016/j.apenergy.2020.114723

12. Building occupant transient agent-based model – Movement module

Author:
Dziedzic, Jakub Wladyslaw; Yan, Da; Sun, Hongsan; Novakovic, Vojislav
Source:
Applied energy 2020 v.261 pp. 114417
ISSN:
0306-2619
Subject:
air conditioning,   etc   ; buildings; computer software; energy; heat; models;     Show all 6 Subjects
Abstract:
... Simulation of occupant behaviour (OB) in buildings is a challenging task. Available software uses a broad spectrum of tools that try to reproduce the patterns of human activity. From building energy perspective, the main emphasis in research has been focused on discovering behaviour directly related to energy. In recent years, more attention has been given to simulating occupant actions that are i ...
DOI:
10.1016/j.apenergy.2019.114417

13. Refrigerant alternative and optimization under the constraint of the greenhouse gas emissions reduction target

Author:
Wang, Huihui; Zhao, Linjia; Cao, Ruoxin; Zeng, Weihua
Source:
Journal of cleaner production 2021 v.296 pp. 126580
ISSN:
0959-6526
Subject:
air conditioning,   etc   ; carbon dioxide; decision making; economic costs; energy; environmental impact; greenhouse effect; greenhouse gases; greenhouses; industry; life cycle assessment; ozone depletion; risk; China;     Show all 14 Subjects
Abstract:
... Fluorinated gases are considered greenhouse gases and have a global warming effect up to 22,800 times greater than that of carbon dioxide. Fluorinated gases are widely used as room air conditioner refrigerants. In view of the current lack of well-equipped refrigerant replacement technology and research on comprehensive and systematic refrigerant alternative schemes, we propose a decision-making me ...
DOI:
10.1016/j.jclepro.2021.126580

14. Measurement of embodied carbon and energy of HVAC facilities in healthcare centers

Author:
García-Sanz-Calcedo, Justo; de Sousa Neves, Nuno; Almeida Fernandes, João Paulo
Source:
Journal of cleaner production 2021 v.289 pp. 125151
ISSN:
0959-6526
Subject:
air conditioning,   etc   ; buildings; carbon; carbon dioxide; design; electric power; embodied energy; emissions; environmental impact; gases; health services; heat; manufacturing; measurement; Spain;     Show all 15 Subjects
Abstract:
... The design of a sustainable building should include a reduction of its energy consumption, by considering the embodied energy and CO₂ emissions generated during material manufacturing, transport and construction processes. A Heating, Ventilation and Air Conditioning (HVAC) facility in buildings consumes large amounts of energy. The aim of this work is to quantify the embodied carbon and energy of ...
DOI:
10.1016/j.jclepro.2020.125151

15. Climate change perception and adaptation of residents in Hong Kong

Author:
Ma, Anson T.H.; Wong, Gwendolyn K.L.; Cheung, Lewis T.O.; Lo, Alex Y.; Jim, C.Y.
Source:
Journal of cleaner production 2021 v.288 pp. 125123
ISSN:
0959-6526
Subject:
air conditioning,   etc   ; behavior; cognition; deterioration; education; factor analysis; frequency; global warming; knowledge; lead; questionnaires; regression analysis; risk perception; sampling; society; surveys; telephones; urban areas; China;     Show all 19 Subjects
Abstract:
... Climate change has induced increasingly alarming impacts on urban environment. Adaptation is one of the most common measures to mitigate the impacts and reduce vulnerability. This study explored the individual adaptation from a cognitive and psychological perspective that has rarely been adopted. The current study aims to measure the risk perception (RP) and perceived adaptive capacity (PAC) of in ...
DOI:
10.1016/j.jclepro.2020.125123

16. “Soapy water” transformation of the “condenser” with self-cleaning ability and antibacterial activity

Author:
Kong, Linghao; Gu, Lingbiao; Yu, Laigui; Ma, Hongru; Zhang, Yong; Wang, Zhigang; He, Qiang; Chen, Xinhua; Zhang, Pingyu
Source:
Journal of cleaner production 2021 v.286 pp. 125432
ISSN:
0959-6526
Subject:
air conditioning,   etc   ; Escherichia coli; Staphylococcus aureus; antibacterial properties; aqueous solutions; copper; fields; heat transfer; hydrophobicity; methodology; nanomaterials; oxidation; sodium; surfaces; water;     Show all 15 Subjects
Abstract:
... Superhydrophobic materials exhibit diverse application potential in various fields due to their excellent self-cleaning properties. However, it is still challenging to prepare bionic superhydrophobic materials employing the green methods. In this study, the “condenser” (simulated by a red copper spiral tube) with excellent self-cleaning properties and antibacterial activity has been prepared by a ...
DOI:
10.1016/j.jclepro.2020.125432

17. A new scheme for large marine vessels LNG cold energy utilization from thermodynamic and thermoeconomic viewpoints

Author:
Ouyang, Tiancheng; Tan, Jiaqi; Xie, Shutao; Wu, Wencong; Su, Zixiang
Source:
Energy conversion and management 2021 v.229 pp. 113770
ISSN:
0196-8904
Subject:
air conditioning,   etc   ; administrative management; algorithms; ambient temperature; cold; desalination; energy recovery; exergy; fluids; gas engines; issues and policy; natural gas; oils; seawater; ships; solutions; storage;     Show all 17 Subjects
Abstract:
... With the implementation of International Maritime Organization's new emission regulations in 2020, it has a huge impact on shipping industry. To meet the strict emission regulations and policies, liquefied natural gas, as a promising fuel, can replace the traditional heavy oil, and effectively and practically act as the main power source of marine engine. When liquefied natural gas is vaporized fr ...
DOI:
10.1016/j.enconman.2020.113770

18. Energy-saving of air-cooling heat exchangers operating under wet conditions with the help of superhydrophobic coating

Author:
Muneeshwaran, M.; Wang, Chi-Chuan
Source:
Energy conversion and management 2021 v.229 pp. 113740
ISSN:
0196-8904
Subject:
air conditioning,   etc   ; administrative management; air; air temperature; condensates; energy conservation; energy conversion; heat exchangers; heat pumps; heat transfer; hydrophobicity; pressure; relative humidity; spatial distribution; velocity;     Show all 15 Subjects
Abstract:
... The condensate retention and bridging on the airside of the heat exchanger, such as the evaporator of the heat pump and air-conditioning system, can adversely increase the pressure drop penalty and energy consumption of the heat transfer systems. The objective of this study is to minimize the airside pressure drop of the rectangular plain heat exchangers using superhydrophobic coating which promot ...
DOI:
10.1016/j.enconman.2020.113740

19. Microgrid energy management strategies assessment through coupled thermal-electric considerations

Author:
Chapaloglou, Spyridon; Nesiadis, Athanasios; Atsonios, Konstantinos; Nikolopoulos, Nikos; Grammelis, Panagiotis; Carrera, Angel; Camara, Oscar
Source:
Energy conversion and management 2021 v.228 pp. 113711
ISSN:
0196-8904
Subject:
air conditioning,   etc   ; administrative management; algorithms; batteries; case studies; computer software; dynamic models; electricity; electricity costs; energy conversion; heat pumps; sports; storage; Spain;     Show all 14 Subjects
Abstract:
... Battery Energy Storage Systems (BESSs) are considered as one of the most promising technological options towards high self-sufficiency of building facilities and higher independency from the main grid through autonomous operation. At the same time, BESS are an essential component for a cost-optimized operation of grid-connected microgrids. In addition, the ever-increasing trend to replace conventi ...
DOI:
10.1016/j.enconman.2020.113711

20. Energy performance analysis on segmented liquid desiccant air-conditioning system for bus spray-paint booths

Author:
Guan, Bowen; Liu, Xiaohua; Zhang, Tao
Source:
Journal of cleaner production 2021 v.278 pp. 123898
ISSN:
0959-6526
Subject:
air conditioning,   etc   ; air; cooling; cost effectiveness; desiccants; energy conservation; energy efficiency; humidity; liquids; manufacturing; mathematical models; primary energy; product quality; systems engineering; temperature;     Show all 15 Subjects
Abstract:
... A paint booth is the dominant energy consumer in a manufacturing plant. Large amount of conditioned air with accurate temperature and humidity is required in the spray-paint booth to guarantee constant product quality, which implies huge energy consumption for air-conditioning. However, there has been limited research on energy-saving design for air-conditioning systems applied in the spray-paint ...
DOI:
10.1016/j.jclepro.2020.123898