Article
Thermodynamics
Liu Chen, Wenjie Deng, Yujie Chu
Summary: A new desiccant evaporative combined chilled air/chilled water air-conditioning system is proposed for humidity independent control in humid climates. Experimental results show that the system performs well under different temperature and humidity conditions.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Hadeed Ashraf, Muhammad Sultan, Redmond R. Shamshiri, Farrukh Abbas, Muhammad Farooq, Uzair Sajjad, Hafiz Md-Tahir, Muhammad H. Mahmood, Fiaz Ahmad, Yousaf R. Taseer, Aamir Shahzad, Badar M. K. Niazi
Summary: This study evaluated the feasibility of a desiccant dehumidification-based M-DAC system for greenhouse air-conditioning, finding that it can achieve optimal vapor pressure deficit levels for greenhouse crop production.
Article
Construction & Building Technology
Lanbo Lai, Xiaolin Wang, Gholamreza Kefayati, Eric Hu
Summary: This paper proposes a solar-assisted solid desiccant cooling system integrated with M-cycle IEC, which has the best cooling performance in hot and humid areas. By adjusting the recirculation air ratio, the system can achieve a reduction in supply air temperature and humidity ratio, but it also increases the water consumption rate.
ENERGY AND BUILDINGS
(2022)
Review
Energy & Fuels
Kalpana, Sudhakar Subudhi
Summary: The vapor compression air conditioning (VCAC) is the most widely used method for space cooling, but it has disadvantages such as consuming more electricity and contributing to global warming. The liquid desiccant system using an evaporative cooler is a cost-effective and environmentally sustainable alternative. By integrating liquid desiccant dehumidifiers with evaporative coolers, energy consumption can be reduced, especially in hot and humid areas.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Chemical
Lanbo Lai, Xiaolin Wang, Gholamreza Kefayati, Eric Hu
Summary: A new configuration of a solid desiccant evaporative cooling system integrated with a humidification-dehumidification desalination unit was proposed and its performance was evaluated. Two operation modes were proposed depending on climate conditions, and the system was evaluated under various operating conditions. The findings indicated that the proposed system had good potential for producing freshwater and cooling simultaneously.
Article
Green & Sustainable Science & Technology
Ghulam Hussain, Muhammad Aleem, Muhammad Sultan, Uzair Sajjad, Sobhy M. Ibrahim, Redmond R. Shamshiri, Muhammad Farooq, Muhammad Usman Khan, Muhammad Bilal
Summary: The study investigates the performance of a Maisotsenko cycle evaporative cooling assisted solid desiccant air-conditioning (M-DAC) system for agricultural storage. A lab-scale solid silica gel-based desiccant AC (DAC) system was developed and its thermodynamic performance was studied. The M-DAC system showed good performance in terms of temperature and humidity range, cooling potential, and energy consumption.
Article
Thermodynamics
Kamal Kumar Ghosh, Chandrakant R. Sonawane, Anand Pandey, Hitesh Panchal, A. S. El-Shafay, Ahmed Mohamed Mahmoud Ibrahim, Mohammad S. Alsoufi, Ammar Elsheikh
Summary: Heat driven sorption technologies are promising alternatives to traditional vapour compression systems for comfort cooling, with liquid desiccant-based cooling systems being preferred for high latent heat load applications. Experimental investigation of an indirect contact type liquid desiccant cooling system showed that optimizing the inlet air and desiccant solution parameters is crucial for achieving the highest possible latent heat effectiveness in the cooling system.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Maisha Mumtaz, Bryan C. Pamintuan, Andrew J. Fix, James E. Braun, David M. Warsinger
Summary: This paper presents a new air conditioning system that combines membrane-based dehumidification with dewpoint evaporative cooling, aiming to achieve energy efficiency and environmental friendliness. The system has a high coefficient of performance and water utilization rate, and it emits significantly less greenhouse gases compared to traditional air conditioning systems.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Review
Construction & Building Technology
Shekh Abdullah, Mohd Nashrul Bin Mohd Zubir, Mohd Ridha Bin Muhamad, Kazi Md Salim Newaz, Hakan F. Oztop, Md Shadab Alam, Kaleemullah Shaikh
Summary: Internal space cooling technology is shifting towards alternative solutions to conventional vapor compression systems in order to mitigate global warming. The development and commercialization of innovative cooling systems are currently underway, with evaporative cooling systems being one possible solution. However, their market penetration is limited due to challenges in diverse climate conditions. This critical review explores various evaporative cooling systems and their recent developments, compares their performance, and discusses the effects of different dehumidification systems on the evaporative cooling system. The analysis shows that independent dehumidification before cooling can effectively improve the efficiency of the evaporative cooling system, making it a promising replacement for vapor compression systems in different outdoor conditions.
ENERGY AND BUILDINGS
(2023)
Article
Thermodynamics
Ke Qu, Germilly Barreto, Muriel Iten, Yuhao Wang, Saffa Riffat
Summary: The heat and mass transfer of liquid desiccant for dehumidification and cooling is a promising energy-efficient technology to improve indoor thermal comfort. This research investigates the integration strategies and energy performance of such systems in real buildings, using a low-rise Greek apartment building as a case study.
Article
Thermodynamics
Jordan D. Kocher, Shannon K. Yee, Robert Y. Wang
Summary: We present a theoretical description of a new desiccant air conditioning cycle that uses thermoresponsive polymers. The new cycle has three major advantages over the traditional case: lower regeneration temperature, liquid water harvesting capability, and significantly higher coefficients of performance (COPs).
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Bianfeng Yang, Cong Wang, Xu Ji, Ren Zhang, Xirong Yue, Junneng Nie
Summary: A two-stage evaporative cooling system with composite activated carbon fiber dehumidification is proposed. The system utilizes two rounds of evaporative cooling and internally cooled desiccant bed to effectively dehumidify and cool the air, resulting in improved dehumidification capacity and cooling efficiency.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Review
Construction & Building Technology
Shaochen Tian, Xing Su, Yining Geng
Summary: This paper summarizes the research on hybrid heat pump and desiccant wheel systems and provides potential research directions for improving system performance and applicability. The study primarily focuses on different system combination methods, with less detailed discussion on component design, especially the desiccant wheel. Additionally, there is a lack of comparison among different systems to determine the most suitable system configuration.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Thermodynamics
Liang Chun, Guangcai Gong, Pei Peng, Yangda Wan, Kian Jon Chua, Xi Fang, Wenqiang Li
Summary: A novel building cooling system, the DAV-cooling system, is proposed in this study, which integrates dew point evaporative cooling, air-carrying energy radiant air conditioning, and vacuum membrane-based dehumidification. The system does not use organic refrigerants and can provide fresh air indoors while being flexibly adjusted to meet various cooling requirements.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Chemical
Lanbo Lai, Xiaolin Wang, Gholamreza Kefayati, Eric Hu
Summary: In this paper, the performance of a hybrid system combining a solid desiccant-based M-cycle cooling system with a humidification-dehumidification desalination unit was analyzed and compared in three modes. The recirculation mode showed better cooling performance, producing up to 7.91 kW of cooling load and maintaining a low air temperature and humidity under various conditions. All three modes had similar water production rates, but the recirculation mode had a higher coefficient of performance. However, this mode also had higher water consumption.
Article
Engineering, Environmental
Lurong Ge, Yaohui Feng, Yanjun Dai, Ruzhu Wang, Tianshu Ge
Summary: This study develops a composite sorbent with excellent water sorption performance and long-term stability by encapsulating an ionic liquid in ordered mesoporous MCM-41. The composite sorbent exhibits fast sorption rate, low temperature-driven regeneration potential, and no corrosion to metal components.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Dongwen Chen, Xiao Hu, Yong Li, Zulkarnain Abbas, Ruzhu Wang, Dehong Li
Summary: This paper proposes an energy flow calculation method for the energy internet based on the analysis of energy flow using potential parameters and the exploration of general transmission principles. The results show that this method can effectively analyze complex heating solution networks.
Article
Chemistry, Physical
Ziya Zeng, Bingchen Zhao, Ruzhu Wang
Summary: This review summarizes the recent advances in adsorption thermal storage, focusing on the design of adsorbent materials and the optimization of system configurations. The application-oriented selection principles of diversified materials and system cycles are introduced, providing practical guidelines for overall design in various application scenarios.
ENERGY STORAGE MATERIALS
(2023)
Article
Thermodynamics
Jingwei Chao, Jiaxing Xu, Taisen Yan, Shizhao Xiang, Zhaoyuan Bai, Ruzhu Wang, Tingxian Li
Summary: Cold energy storage is important for thermal management and energy utilization. Sorption thermal battery (STB) has advantages over conventional technologies, but suffers from low-power-density energy storage. This study proposes a novel tube-free evaporator to reduce thermal resistance and accelerate sorption rate in STB, leading to improved cold storage performance.
Article
Thermodynamics
Chenxi Wang, Hao Zou, Shuai Du, Danfeng Huang, Ruzhu Wang
Summary: Greenhouses are used to create a protected growing environment for crops. This research proposes a climate control system that combines solid sorption and sensible thermal storage to deal with the problems caused by cold air temperature and high humidity in winter climates. The experiments show that the system can effectively increase nocturnal air temperature, decrease relative humidity, and reduce humidity ratio.
Article
Thermodynamics
Jing Xu, Wei Zhang, Zhiliang Liu, Quanwen Pan, Ruzhu Wang, Tianshu Ge
Summary: Current adsorption refrigeration systems are limited in their ability to produce multiple cooling outputs. This paper introduces a hybrid adsorption refrigeration system that can provide both cold water and dry air through efficient desiccant coated heat exchangers. Experimental results show that the hybrid system can simultaneously output cold water and dry air with a heat source temperature of 50-80 degrees C. The system achieves its maximum cooling performance and efficiency under certain temperature conditions.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
P. Ganesan, Trygve M. Eikevik, Khalid Hamid, Ruzhu Wang, Hongzhi Yan
Summary: This study investigates the production of high-temperature water using a two-stage cascade refrigeration system in a high-temperature heat pump (HTHP). The system utilizes mixed natural zeotropic refrigerants and water as a heat source, achieving high performance and heating capacity.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)
Editorial Material
Multidisciplinary Sciences
Primoz Poredos, Ruzhu Wang
Review
Thermodynamics
Khalid Hamid, Uzair Sajjad, Marcel Ulrich Ahrens, Shuai Ren, P. Ganesan, Ignat Tolstorebrov, Adeel Arshad, Zafar Said, Armin Hafner, Chi-Chuan Wang, Ruzhu Wang, Trygve M. Eikevik
Summary: High temperature heat pumps (HTHP) are a well-established and sustainable technology for processing temperatures below 100 degrees C, especially when combined with renewable energy. The next frontier is to enhance the working temperature range to serve the 100-200 degrees C range, reducing energy consumption and CO2 emissions in industrial processes.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Haoran Liu, Jiaqi Yu, Ruzhu Wang
Summary: In portable electronic devices, both the junction temperature and skin temperature need to be controlled. This paper proposes a convolution-based method to generate dynamic compact thermal models for predicting skin temperature. A linear fitting model is also proposed for real-time prediction of skin temperature in laptops. Experimental and simulation results show great potential of this modeling method in thermal design and control optimization.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Physical
Lurong Ge, Yaohui Feng, Yanan Xue, Yanjun Dai, Ruzhu Wang, Tianshu Ge
Summary: Metal-organic frameworks (MOFs) show potential for indoor humidity regulation due to their steep water uptake and moderate regeneration temperature. However, current methods for enhancing their performance face challenges of corrosion and instability. In this study, a template-guided tuning strategy is proposed, resulting in a binary nanocomposite with improved properties. The nanocomposite exhibits a higher specific surface area and water uptake compared to the parent material, MIL-101(Cr). Furthermore, the nanocomposite demonstrates efficient and stable humidity regulation driven by sunlight with minimal energy input.
Review
Chemistry, Multidisciplinary
Zhifeng Hu, Fuqiang Chu, He Shan, Xiaomin Wu, Zhichao Dong, Ruzhu Wang
Summary: This review comprehensively summarizes the progress on phenomena, mechanisms, regulations, and applications of droplet impact on superhydrophobic surfaces. The focal points are droplet contact and rebound, and various applications are classified according to their requirements. The review also points out the remaining challenges and outlines future research directions.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
He Shan, Ziya Zeng, Xinge Yang, Primoz Poredos, Jie Yu, Zhihui Chen, Ruzhu Wang
Summary: This study presents a design framework for utilizing hygroscopic gels for atmospheric water sorption and thermal energy storage. A hygroscopic gel with high energy density and water sorption capacity was developed and integrated into a multifunctional device, achieving efficient heat storage and liquid water production.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Zhenyuan Xu, Jie Yu, He Shan, Jiebing Wang, Jintong Gao, Zhanyu Ye, Ruzhu Wang
Summary: This study proposes a solute-replacement strategy for solar evaporation, which enables stable evaporation of high-viscosity and low-solubility solutions by decoupling the heat loss and salt rejection pathways. It provides fundamental understandings and strategies for the further advancement of solar evaporation in real-world applications.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Zhihui Chen, Zhao Shao, Yucheng Tang, Fangfang Deng, Shuai Du, Ruzhu Wang
Summary: This study investigated the effect of dosage scale-up on the water uptake performance of metal-organic framework (MOF) and found that the water adsorption isotherm exhibited hysteresis, the water uptake capacity diminished, the time for MOFs to reach saturation state increased, and the adsorption rate coefficient attenuated. These findings provide useful guidance and new insights for future research in sorption-based atmospheric water harvesting (SAWH).
Article
Construction & Building Technology
Parth Bansal, Steven Jige Quan
Summary: This study investigates the relationship between urban form and canopy layer urban heat island (CUHI) using a relatively large sample of microclimate sensors in Seoul, Korea. The study compares different statistical models and finds that the spatially explicit gradient boosting decision tree (GBDT) model has the highest accuracy. The study also shows that the effect of urban form on CUHI varies at different time instances during the day. These findings provide valuable insights for planners to understand the complexity of urban climate and reduce CUHI magnitude.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Miaomiao Liu, Salah Almazmumi, Pinlu Cao, Carlos Jimenez-bescos, John Kaiser Calautit
Summary: Windcatchers provide effective low-energy ventilation and summer passive cooling in temperate climates. However, their use in winter is limited due to significant ventilation heat loss and potential discomfort. This study evaluates the applicability of windcatchers in low-temperature conditions, highlighting the need for control strategies to reduce over-ventilation and the integration of heat recovery or thermal storage to enhance winter thermal conditions.
BUILDING AND ENVIRONMENT
(2024)
Review
Construction & Building Technology
Behrouz Nourozi, Aneta Wierzbicka, Runming Yao, Sasan Sadrizadeh
Summary: This article presents a systematic review of ventilation solutions in hospital wards, aiming to enhance pathogen removal performance while maintaining patient and healthcare staff comfort using air-cleaning techniques. The study reveals the importance of proper ventilation systems in reducing infection risk and adverse effects of cross-contamination.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhen Yang, Weirong Zhang, Hongkai Liu, Weijia Zhang, Mingyuan Qin
Summary: The study examines the influence of personalized local heating on the thermal comfort of occupants in old residential buildings. The findings reveal that personalized local heating can increase the overall thermal sensation of occupants, but only a few methods are effective in enhancing thermal comfort. The chosen heating methods and background temperature affect the participants' selection of heating parts.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Hong Cheng, Dan Norback, Huilin Zhang, Liu Yang, Baizhan Li, Yinping Zhang, Zhuohui Zhao, Qihong Deng, Chen Huang, Xu Yang, Chan Lu, Hua Qian, Tingting Wang, Ling Zhang, Wei Yu, Juan Wang, Xin Zhang
Summary: The home environment and sick building syndrome (SBS) symptoms in five southern Chinese cities have been studied over time. The study found a decrease in asthma prevalence and an increase in allergic rhinitis. Cockroaches, rats, mice, mosquitoes or flies were identified as consistent biological risk factors for SBS symptoms, while redecoration, buying new furniture, and traffic air pollution were identified as other risk factors.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Chaojie Xing, Zhengtao Ai, Zhiwei Liu, Cheuk Ming Mak, Hai Ming Wong
Summary: This study experimentally investigated the emission characteristics of droplets around the mouth during dental treatments. The results showed that the peak mass fraction of droplets occurs within the size range of 20 μm to 100 μm, and droplets with a diameter less than 200 μm account for over 80% of the mass fraction. The dominant emission direction of droplets is towards the dummy's head and chest, forming an approximately cone shape.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhijian Liu, Zhe Han, Lina Hu, Chenxing Hu, Rui Rong
Summary: This study compared the effects of different respiratory behaviors on the distribution of aerosols in a ward and the risk of infection for healthcare workers using numerical simulation. It was found that talking in the ward significantly increased aerosol concentrations, particularly short periods of talking. Wards designed with side-supply ventilation had lower overall infection risk. Talking alternately between healthcare workers and patients slightly extended the impact time of aerosols.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yan Yan, Mengyuan Kang, Haodong Zhang, Zhiwei Lian, Xiaojun Fan, Chandra Sekhar, Pawel Wargocki, Li Lan
Summary: In a high-density city, opening windows for sleep may lead to increased indoor temperature, higher PM2.5 concentration, and noise disturbance, which can negatively impact sleep quality.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yan Bai, Liang Liu, Kai Liu, Shuai Yu, Yifan Shen, Di Sun
Summary: This study developed a non-intrusive personal thermal comfort model using machine learning techniques combined with infrared facial recognition. The results showed that the ensemble learning models perform better than traditional models, and the broad learning model has a higher prediction precision with lower computational complexity and faster training speed compared to deep neural networks. The findings provide a reference for optimizing building thermal environments.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yue Lei, Zeynep Duygu Tekler, Sicheng Zhan, Clayton Miller, Adrian Chong
Summary: Mixed-mode ventilation is a promising solution for achieving energy-efficient and comfortable indoor environments. This study found that occupants can thermally adapt when switching between natural ventilation (NV) and air-conditioning (AC) modes within the same day, with the adaptation process stabilizing between 35 to 45 minutes after the mode switch. These findings are important for optimizing thermal comfort in mixed-mode controls, considering the dynamic nature of thermal adaptation.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Nan Mo, Jie Han, Yingde Yin, Yelin Zhang
Summary: This study develops a method based on the LCZ framework for a comprehensive evaluation of urban-scale heat island effects, considering the impact of geographic factors on LST. The results show that Guilin's geomorphological conditions lead to abnormal heat island effects during winter, and the cooling effects of mountains and water bodies vary seasonally in different built areas, with LCZ 2 exhibiting the strongest cooling effect.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Tunga Salthammer
Summary: Monitoring the potential formaldehyde emission of wood-based materials through test chamber investigations has significantly contributed to reducing indoor formaldehyde concentrations. However, the different methodologies used in these procedures prevent direct result comparison. Empirical models for converting formaldehyde steady-state concentrations based on temperature, humidity, air change rate, and loading were developed in the 1970s and have been modified to accommodate the development of lower-emitting materials. Formaldehyde emissions from wood-based materials are complex and require nonlinear regression tools for mathematical analysis.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Katarina Stebelova, Katarina Kovacova, Zuzana Dzirbikova, Peter Hanuliak, Tomas Bacigal, Peter Hartman, Andrea Vargova, Jozef Hraska
Summary: This study investigated the impact of reduced short-wavelength light on the hormone melatonin metabolite 6-sulfatoxymelatonin (u-sMEL) and examined the association between previous day's light exposure and u-sMEL. It was found that reducing short-wavelength light during the day did not change the concentration of u-sMEL. Personal photopic illuminance was positively correlated with u-sMEL in the reference week. The illuminance had a significant impact on u-sMEL, as shown by the evaluation of the mean of all three urine samples. However, this correlation was not found in the experimental week.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Ruoxin Xiong, Ying Shi, Haoming Jing, Wei Liang, Yorie Nakahira, Pingbo Tang
Summary: This study proposes a data-model integration method to identify and calibrate uncertainties in machine learning models, leading to improved thermal perception predictions. The method utilizes the Multidimensional Association Rule Mining algorithm to identify biased human responses and enhances prediction accuracy and reliability. The study also evaluates different calibration techniques and discovers their potential in enhancing prediction reliability.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Beichao Hu, Zeda Yin, Abderrachid Hamrani, Arturo Leon, Dwayne McDaniel
Summary: This paper introduces an innovative super-resolution approach to model the air flow and temperature field in the cold aisle of a data center. The proposed method reconstructs a high-fidelity flow field by using a low-fidelity flow field, significantly reducing the computational time and enabling real-time prediction.
BUILDING AND ENVIRONMENT
(2024)
