Jian Ge

• Shanghai Astronomical Observatory

The popularity of urban distributed photovoltaics is crucial for building low-carbon cities. Retrofitting roofs with photovoltaic tiles is a new option. However, whether the public supports this initiative needs to be understood. Assessing willingness to pay is a critical way to measure public acceptance. Therefore, this paper assesses Chinese urba...

Accurate load prediction is a prerequisite for the design, operation, scheduling, and management of energy systems. In the context of the development of smart grids, the extensive integration of highly volatile distributed energy generation into the power system has brought new challenges to the accuracy, reliability, real-time performance, and int...

High-resolution urban surface information, e.g., the fraction of impervious/pervious surface, is pivotal in studies of local thermal/wind environments and air pollution. In this study, we introduced and validated a domain adaptive land cover classification model, to automatically classify Google Earth images into pixel-based land cover maps. By com...

There is growing evidence of the high transmission potential of COVID-19 through virus-laden aerosols. Because aerosols are inhaled in various concentrations, an overall assessment of transmission risks at different indoor scales is crucial. However, a comprehensive risk assessment method that evaluates the direct link between short-range and room-...

Changed urban surface and human activities in urban areas have led to serious environmental problems globally, including deteriorated local thermal/wind environments and air pollution. In this study, we proposed and validated a domain adaptive land cover classification model, to automatically classify Google Earth images into pixel-based land cover...

Cardiovascular diseases (CVDs) are the number one health threat globally. Adverse indoor thermal environments are associated with excess mortality caused by CVDs in the cold season. While many studies have focused on the impact of indoor temperature on CVDs, none has considered the fluctuation of indoor temperature. To quantify the effect of indoor...

The outbreak of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has caused an unparalleled disruption to daily life. Given that COVID-19 primarily spreads in densely populated indoor areas, urban public transport (UPT) systems pose significant risks. This study presents an analysis of the air change rate in buses, subways,...

The characteristics of energy balance and heat transfer on building walls are important for building energy consumption and outdoor thermal/wind environment. The in-situ measurement of energy balance and wall flows during clear days on a 16-story building in Guangzhou, China is introduced and analyzed in this paper. The velocity along the wall was...

The availability of high spatio-temporal resolution of urban air temperature is paramount for understanding urban heat island (UHI) and developing effective mitigation strategies, in particular for local-scale mitigations. Obtaining high spatial resolution of air temperature at city-scale is challenging as the quantity of weather stations is often...

A significant portion of the cooling or heating load of buildings is contributed by relatively large heat flux through thermal bridges. Water vapour concentration significantly alters thermal conductivity and heat transfer characteristics within the thermal bridges, affecting building energy consumption, particularly in humid climates. Moreover, th...

Moisture in building envelopes increases the energy consumption of buildings and induces mould growth, which may be amplified within the area of thermal bridges due to their different hygrothermal properties and complex structures. In this study, we aimed to (1) reveal the moisture distribution in the typical thermal bridge (i.e., wall-to-floor the...

The hygric performance of building envelopes determines the degradation progress. Multiple factors, including the climate parameters (e.g., solar radiation and wind-driven rain) and building structure (e.g., thermal bridges), significantly affect the hygrothermal conditions in building envelopes. Inappropriate thermal insulation measures may exacer...

The higher demands for energy efficiency in nearly zero energy buildings (nZEBs) give rise to concerns on the impact of thermal bridges on building's thermal performance. The extra heat loss by thermal bridges needs to be reduced especially for residential nZEBs with internal insulation in China's Hot Summer–Cold Winter (HSCW) zone. This paper defi...

The urban heat island (UHI) phenomenon has gained increasing attention as it not only affects the energy consumption of buildings but also threatens the health of urban dwellers. In this study, we calculated the UHI intensity in major China cities across different climates based on the measured weather data of year 2019. The influences of UHI inten...

Urban residential buildings are the prime contributors to carbon emissions, whose reduction is significantly affected by old residential areas as essential components of urban renewal. In current studies on the potential for carbon reduction in residential localities, the measurement standard mostly used is the amount of carbon reduced during opera...

The school’s indoor environment significantly affects students’ health and learning performance. Although related studies have been carried out in many regions, only a few have examined indoor classroom environments and proposed the energy-saving optimization of heating and ventilation in winter in China’s hot summer and cold winter areas. This stu...

Economic growth and corresponding energy demand have been rapidly increasing in developing countries where household determinants have a remarkable influence. This study draws on the impact of household accessible factors on energy use in Vietnam which remains a new case study with rare information on energy data in the residential area. Path analy...

Moisture in the building envelopes increase the energy consumption of buildings and induce mould growth, which may be amplified within the area of thermal bridges due to their different hygrothermal properties and complex structures. In this study, we aimed to (1) reveal the moisture distribution in the typical thermal bridge (i.e., wall-to-floor t...

Due to different capacities for protection and development, the vitality of traditional villages (VTV) in China varies to a great degree. However, the current classification-based sustainable revitalization strategies still lack an up-to-date vitality assessment. Based on the essential requirement of sustainable revitalization, this study defines t...

Indoor environmental quality is closely-related to the occupants' comfort, performance and health. However, very few studies on indoor environmental quality were done in university dormitories, especially with regard to space design. This study aims to better understand the influence of space design on occupants' satisfaction with indoor environmen...

For the limited areas of building rooftops, installing wind turbines can increase energy production, as compared to paving over the photovoltaic panels, and can serve as a viable means for complementary power generation. However, a concise criterion for estimating the availability of wind energy in the built environment is lacking. In this work, th...

Numerous existing neighbourhoods, such as many of those built-in 1980–2000 in China, have poor physical environmental conditions. Supplemented by field investigations, this paper puts forward an outdoor environment evaluation tool designed for existing neighbourhoods based on the multi-criteria decision-making (MCDM) method. Evaluation indicators o...

Existing nondestructive pile integrity test (PIT) methods have certain limitations in the interpretation of test results for extended pile shafts supporting an existing structure. A novel multipoint traveling wave decomposition (MPTWD) method was developed in this study to address some of these limitations and predict the unknown length of an exten...

Solar heat gain is an important part of the cooling load of a building, especially for a radiant cooling room. This study presents the development of a mathematical model based on the state–space method, which can consider the influence of dynamic solar heat gain on radiant cooling floor. The calculated results were consistent with the experimental...

In this study, we focused on electricity consumption and household characteristics with dynamic pricing experiment in the collective housing complex of a Japanese Smart Community, which had been divided into two groups, Treatment group (110 households) and Control group (65 households). We collected and analyzed a questionnaire survey on the family...

To address the primary energy shortage problem, Japan has implemented a series of policies and measures for residential energy conservation and emission reduction. Among them, the home energy management system (HEMS) as a hub connecting users and power companies to realize energy visualization has been widely studied. The research object of this st...

The net-zero energy building (NZEB) is spreading rapidly as an integrated solution to address energy saving and carbon emissions reduction in the building sector. However, few studies pay close attention to the operational performance of NZEBs as well as their life cycle impact on the environment. This study investigates the operational performance...

The energy forecast modeling has long been referred to as the function of estimating the energy consumption of a building and providing sustainable design options for energy-efficient policies. In addition to the existing conventional schemes for energy performance and energy simulation, there is the potential to connect steady-state energy modelin...

The outdoor physical environments of many old communities are unable to meet modern living requirements and require improvement urgently. This is especially true for communities in regions with extremely hot summers and cold winters, which may cause additional difficulties. This study used measurements and questionnaire data to investigate outdoor...

Non-enclosed atriums, which give unobstructed access to the surrounding area, are gradually becoming common in modern shopping malls. The environmental problems they cause (e.g., vertical thermal stratification and overheating) are thus affecting adjacent occupied zones more often. This study focuses on the thermal environment of occupied zones adj...

The amount of heat loss through thermal bridges increases with the improvement of the thermal insulation performance of the building exterior wall, making thermal bridges vulnerable points of thermal insulation. The wall-to-floor thermal bridge (WFTB) takes the most considerable fraction on the building envelope and has the largest heat flux. In th...

Natural convection flow above a heated horizontal area plays a major role in energy utilisation, indoor/outdoor thermal environment, city ventilation and pollutant dispersion. Such natural convection can present different flow patterns, and identifying the type of flow pattern is crucial for determining the bulk heat transfer coefficient. Water tan...

Due to the improvement of people's living standards, uptake of multi-functional household appliances, electricity consumption accounts for a rising ratio in the proportion of primary energy usage. Currently, electricity accounts for more than 50% of primary energy usage and city gas is about 21% of total. The aim of this research focus on improving...

Green and energy-saving reforms, which use protection as a precondition, can, not only reduce a building’s energy use but also improve its level of comfort. Such reforms can also adapt to the new demands of modern society while extending the life of traditional architecture. Therefore, this research chose a classical, traditional house in Hangzhou...

The severity of urban air pollution problems in China increases with the city's size and population density. Outdoor air pollution not only affects indoor air quality but also increases building energy consumption. We analyzed the characteristics of urban air pollution in China based on long-period monitoring data with high temporal resolution (hou...

Improving the thermal insulating performance of porous building material is of great practical significance for energy-efficient buildings. In this work, silica aerogels (SA) having ultralow thermal conductivity were incorporated into autoclaved aerated concrete (AAC) via physical solution impregnation method to further improving its thermal insula...

Simulating the stochastic energy use behaviors of occupants plays an important role in the accurate prediction and operational optimization of building energy consumption. There are many types of energy use behaviors in residential buildings with strong randomicity and complex driving forces. A set of reasonable stochastic energy use behaviors simu...

[In Press] The UK-China research project Low carbon climate-responsive Heating and Cooling of Cities (LoHCool) investigates enhanced indoor summer comfort in the 9 Billion m2 of building stock of the challenging Hot Summer and Cold Winter (HSCW) zone of China. The HSCW region lies South of the Huai River-Qin Mountain line below which central heatin...

The energy efficiency of an air-conditioning system is reduced when operating under low cooling load, e.g., when few occupants remain in the building, leading to extra energy consumption. This paper proposes an operating strategy for air-conditioning systems based on the indoor occupancy rate (R), where the start-stop is adjusted according to R whi...

The historic environmental vulnerability of traditional villages (HEVTVs) is distinctly differentiated; however, the priority of relevant emergency management practices still lacks appropriate evaluation. This study proposes a new assessment system to quantify HEVTVs at the district level and an extended analysis of the influencing factors of adapt...

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Authors. This article has been retracted at the request of authors due to significant issues discovered after publication. These issues are...

Research on how the database method can assist building performance diagnosis has become an important direction of current green building studies. Many research institutions have paid great attention to the building performance database, adopting new technologies to integrate indoor environmental quality and occupant satisfaction with building ener...

In a number of airport terminals, check-in, departure, and arrival halls are characterized by large spans without partitions and several connections to the outdoor environment; hence, air distributions in such halls are complex. This study compares the indoor thermal environment and thermal comfort produced by different heating methods and discusse...

The hot summer and cold winter zone is an important area in China, accommodated with huge population and occupying a great amount of the lands. Due to the local climate and long-term economic conditions, the adaptive thermal sensation of local residents and the thermal regulation behaviors have unique characteristics. The thermal regulation behavio...

Autoclave aerated concrete (AAC) was incorporated with paraffin to form novel composite building materials with improved thermal storage capacity. The composite samples were prepared by impregnating RT28 paraffin into three types of AAC with different porosities. The effective thermal conductivity of the paraffin/AAC composites was measured at both...

Among commercial buildings, office buildings have the largest number and have the highest total energy consumption (about 14% of the energy consumed by all commercial buildings). Energy used by the HVAC and lighting systems to create comfort indoor thermal and visual environments account for more than half of the total energy usage. The utilization...

The effects of sample length on the transient measurement results of the water vapor diffusion coefficient of autoclave aerated concrete (AAC) were studied based on the transient technique that solves an inverse problem of one-dimensional mass transfer in a semi-infinite domain. Tests were performed on square-rod-shaped AAC samples having various p...

A hospital building features a number of different functional areas. The equipment and systems that serve the building and its medical needs are complex and require various forms of energy, including electricity, gas, steam, hot water and chilled water. Domestic and foreign research data show that the energy consumption per unit area of hospital bu...

Aerated concrete (AC) was incorporated with micro-encapsulated phase change materials (PCMs) to form a novel PCM-composite AC with improved thermal storage capacity. RT25 paraffin was selected as the PCM and the composite materials were prepared by adding micro-encapsulated paraffin as an ingredient at various loadings. The effective thermal conduc...

TOU is an extremely high resolution optical spectrograph (R = 100 000, 380-900 nm), which is designed to detect low-mass exoplanets using the radial velocity technique. We describe an IDL-based radial velocity (RV) data reduction pipeline for the TOU spectrograph and its performance with stable stars. This pipeline uses a least-squares fitting algo...

Low-carbon building retrofit will contribute to delivering China's policy to reduce carbon emissions in its Hot Summer-Cold Winter zone. This paper proposes viable low-carbon adaptation strategies for a recurrent building type within the zone, a 23-storey tower in Hangzhou, investigated within the context of a representative city environment. Indoo...

Hot summer and cold winter zone is a typical climate region in China with high temperatures and stuffiness in summer and low temperature and moisture in winter. The existing buildings bear of both poor thermal performance of building envelope and poor indoor thermal environment. With the development of social economy, increasing demand towards buil...

In the large spaces of airport terminals, such as check-in hall and arriving hall, there are many entrances. The air infiltration from entrances has great influence on the indoor environment, which should be paid high attention to. In this paper, on-site measurement of indoor environment is conducted in an airport terminal, which is located in the...

This paper discusses the relationship between the indicators related to building type and the building energy consumption, using the SPSS correlation analysis method. The result shows that building area and layout are the most significant factors. According to the GIS data of 526 buildings in Hangzhou, 2 typical buildings are selected as samples, a...

The classical problem of inward solidification heat transfer inside a spherical capsule, with an application to thermal energy storage (TES), was revisited in the presence of nano-enhanced phase change materials (NePCM). The model NePCM samples were prepared by dispersing graphite nanoplatelets (GNPs) into 1-tetradecanol (C14H30O) at loadings up to...

Using data on carbon emissions and carbon sinks in the villages of the Yangtze River Delta region of China, this research utilised the management function of grassroots government and selected four factors of these villages’ carbon emissions: natural ecology, economic industry, residential development and infrastructure. Then, a carbon-emissions in...

The pressure drop over a packed bed with sintered ore particles was studied experimentally. The sintered ore particles were characterized to determine their equivalent particle diameter, bed voidage, and sphericity. The pressure drop experiments were performed on unsorted and sieved particles with various size distributions for a superficial veloci...

This study investigates and analyses the energy consumption of two museums in Hangzhou, China. Life cycle analysis (LCA) is used to calculate the energy consumption and greenhouse gas emissions in the life cycles of two museums, thereby determining both their potential and feasibility of energy-saving. Three strategies of using solid walls instead...

Along with the rapid development of urbanization, high density city is becoming more and more common. The dense buildings cause the high intensity of heat island effect, resulting in a large amount of energy consumption. In this research the relationship between the heat island effect and the building density has been studied by CFD software with o...

With the gradual development of the new rural construction, and the continuous improvement of the rural per capita living space, sustainable development of the rural living environment is becoming an increasingly urgent task. This paper selected three different terrain villages in the rural area of Hangzhou as a study object, which located in the M...

Shanghai Shikumen house is a typical one of Chinese traditional residential architecture, which has a "two patios & one corridor" pattern adapting to the climate of Shanghai. In existing researches, most study of the thermal performance dwelling with courtyard is still qualitative. This research constructed the quantitative simulation of the " two...

From the case study of Evening Bell Ringing at Nanping Hill, one of the West Lake Cultural Landscapes in Hangzhou, China, we investigated the soundscape of a scenic area with a profound cultural background. First, we conducted the soundscape physical index of the area in both winter and spring seasons to analyze its objective graphical expression....