Zhiwei Yang's research while affiliated with Tongji University and other places

Publications (7)

Article
Electric demand flexibility in buildings has been deemed to be a promising demand response resource, particularly for large commercial buildings, and it can provide grid-responsive support. A building with a higher electricity flexibility potential has a higher degree of involvement with the grid response. If the electricity flexibility potential o...
Article
Full-text available
Traditional HVAC design process contains a large amount of time-consuming work such as load calculation for each space, hydraulic calculation to determine duct size and careful duct layout arrangement to avoid collision. Computer is more suitable for such kind of "dumb" work with higher efficiency and less fault. Also present building design work i...
Article
Personal cooling garments (PCGs) have been developed to reduce heat stress and improve human thermal comfort in hot environments. In this study, a new type of PCG, a PCM-liquid cooling vest (PLV), is developed to improve the ease of use of phase change material (PCM) garments. The PLV adopts the scheme of combining PCM with water pipes buried in th...
Article
Severe smog days in many parts of developing countries, such as China and India, have drawn worldwide attention. This study aims at integrating various building retrofitting methods of existing buildings to control indoor PM2.5 concentrations. Methods are such as airtightness improvement, room pressure control, recycling air filtration, and combina...
Article
Severe smog days in many parts of developing countries, such as China and India, have drawn worldwide attention. This study aims at integrating various building retrofitting methods of existing buildings to control indoor particulate matter 2.5 concentrations. Methods are such as airtightness improvement, room pressure control, recycling air filtra...
Article
Demand response (DR) of air-conditioning systems is important to shift or reduce the peak electricity demand of commercial buildings by shift or reduce the cooling load. Popular DR strategies of air-conditioning systems include zonal temperature reset and direct control of the main equipment. Many DR studies have been conducted on the thermal inert...

Citations

... Building thermal load prediction plays an important role in energy management and efficiency. It has wide applications, such as in determining the capacity of heating, ventilation, and air conditioning (HVAC) systems in the phase of building design [1]; providing operational optimization control in building energy systems for existing or retrofitted buildings [2]; and determining the demand response baseline for grid-integrated buildings [3][4][5]. In the field of building load prediction, the thermal loads for heating and cooling are the most difficult parts to accurately predict, owing to the complex, nonlinear relationships among the influencing factors (input feature variables), such as the weather conditions, building physics, and different operational behaviors. ...
... The authors employed swarm particle algorithm in a decentralized RHVAC system to eradicate existing limitations and obtain equalimproved performance to conventional centralized sensor fault detection and diagnosis systems. Huajing et al. (2019) reviewed applications of RHVAC system optimization designs. Three approaches, namely white box, black box and grey box approaches, were identified. ...
... Personal cooling measures can effectively alleviate heat stress response in PPE-clad workers [22][23][24]. Wang et al. [25] evaluated the effectiveness of using cooling suits to reduce heat stress in mascot actors working in a hot and humid environment. Both the hybrid cooling suit and the water-cooled suit considerably reduced heat stress in mascot wearers. ...
... An analysis was conducted on the economic feasibility of using insulation and windows for the retrofit of the building, and it was found that window retrofit was more efficient in terms of cost [24]. Various air cleaning and ventilation systems such as total heat exchangers and air purifiers have been developed and applied to improve indoor air quality [25]. Filters are often applied to facility systems rather than to improve the building structures themselves, and several researchers have endeavored to address the simultaneous regulation of temperature and indoor air quality [25,26]. ...
... Lower airtightness values were associated with lower infiltration rate of PM 2.5 in locations where ambient PM 2.5 is high. [35] Indoor and outdoor PM 2.5 concentration measured every 60 s over multiple days. I/O ratio used as the comparison between impacts for high pollutant and low pollutant days. ...
... the water temperature setpoint based on a heating or cooling load response [78], [79]. These models enable accurate curtailment of a specific amount of electricity load during a predetermined time frame, which can be incorporated into an optimal sequence of operation for boilers or chillers serving the facility. ...