Peng Xu

Peng Xu
Tongji University · Department of Mechanical Engineering

PhD

About

105
Publications
28,643
Reads
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3,000
Citations
Citations since 2017
41 Research Items
2467 Citations
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
Introduction

Publications

Publications (105)
Article
The rapid development of building energy consumption monitoring platforms makes engineering data more diverse, which facilitates the goal of reducing emissions. It is increasingly acknowledged that data preprocessing deserves the same attention as intelligent algorithms. In this work, the data quality issue of the engineering big data from non-demo...
Data
This is a dataset used in EnergyDetective 2020, which is a competition on building energy consumption prediction hold in 2020 by Xupeng Research Group. With the prediction case provided in the competition, which is to predict the energy consumption of a building with some physical information but without historical data of its own, the dataset wil...
Article
Traditional manual duct design can result in fan energy waste due to ducts network imbalance and human design error. This paper aims to develop an automated duct routing method, which is able to connect air diffusers across space with the consideration of duct pressure balance, construction obstacles, air resistance reduction and minimising constru...
Article
In recent years, scholars have completed many studies on the fault diagnosis of air-conditioning systems based on Building Energy Management System (BEMS) data, but these studies seldom cover the leakage of water pipes and the damage of insulation layer, that are common but undetected by BEMS. To fill in the gaps, an automatic diagnosis algorithm b...
Article
Proper building categorization is important in building energy efficiency analysis. Primary space usage (PSU) is a typical and widely used commercial building categorization method. The PSU labels are ascertained once the buildings are put into use but not always modified on time when the building usages change, which may lead to false results in a...
Article
Building heating, ventilation, and air conditioning (HVAC) systems consume large amounts of energy, and precise energy prediction is necessary for developing various energy-efficiency strategies. Energy prediction using data-driven models has received increasing attention in recent years. Typically, two types of driven models are used for building...
Article
Although computer technologies have greatly advanced in recent years and help engineers improve work efficiency, the heating, ventilation, and air conditioning (HVAC) design process is still very time-consuming. In this paper, we propose a conceptual framework for automating the entire design process to replace current human-based HVAC design proce...
Article
With the evolution of new energy and carbon trading systems, it is important to accurately predict building energy consumption to help energy arrangements. Additionally, the widespread use of smart meters has introduced a new data context for building energy prediction. Building energy prediction techniques need improvement but the ideas of various...
Article
The peak load caused by heating, ventilation, and air-conditioning (HVAC) systems is one of the main control targets of a demand response (DR) program. One key issue related to DR is the baseline energy consumption forecasting based on which the DR strategies and performance can be evaluated. Data-driven models, as a promising method for HVAC energ...
Article
Fresh air load is an important factor in reducing overall building energy load as the building envelope insulation and various passive building technologies develop. A large amount of fresh air is needed to meet the high requirement of indoor hygiene and air quality. Although various energy-efficient technologies have been studied to reduce fresh a...
Article
Fault diagnosis is important to maintain the normal operation of air-conditioning systems, reduce the energy consumption in buildings, and increase the service life of air-conditioning system equipment. We present a novel approach for fault detection and diagnosis system that relies on image and audio sensors and relevant algorithms. This paper pro...
Article
Electricity demand response (DR) improves the overall energy management efficiency and allows for the integration of large-scale renewable energy into the power grid through interactive management and control of the supply and demand sides. However, in China and other emerging countries (e.g., Japan and Australia) with DR programs, the DR market me...
Article
Heating, ventilation, and air conditioning (HVAC) systems, combined with the internal thermal mass of buildings, have been deemed to be promising means of providing demand response (DR) resources, particularly for buildings with active energy storage systems. DR resources, such as peak-load reduction potential, can provide grid-responsive support r...
Article
With the increasing penetration of distributed energy resources, integrating renewable generations into energy systems is a significant trend for smart and cleaner energy systems. To this end, advanced energy management has become of great importance. Conventional control of distributed energy resources relies on a central operator, which is respon...
Article
This paper presents an ensemble algorithm based on a new load decomposition method to forecast short-term metropolitan-scale electric load. In this method, a decision tree for hourly seasonal attributes and a weighted average method for daily seasonal attributes are first applied to divide seasons into a completely different way. Then, the load of...
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
The energy performance and energy flexibility potential of a sorption-assisted water storage (SAWS)for a medium-scale residential building with eight apartments under the climatic condition of Potsdam, Germany were investigated. The SAWS system consists of a stratified water storage coupled to an adsorption heat pump (AHP). The driving heat source...
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
Full-text available
There are many problems with the present centralized energy systems. With the advancement of distributed energy systems and the advancement of renewable energy technologies, the supply of electricity and heat will be gradually decentralized, forming the Energy Internet combined with information technology that makes energy transactions easier and m...
Conference Paper
Full-text available
PID controllers are still prevailing in building environmental control due to its easy deployment and acceptable performance. However, it is common in practice that the PID controllers are not tuned properly because of the limited time for commissioning and the inexperienced practitioners. This study proposes a simulation-based method to provide in...
Article
Operation strategies influence the building energy efficiency. In order to enhance the building energy efficiency, it’s necessary to adopt proper operation strategies on building equipment. Thus, the identification of existing operation strategies is necessary for the improvement of operation strategies. A data mining (DM) based framework is propos...
Article
Full-text available
Two main tasks of commissioning an air-side HVAC system are to verify the fan capacity and to balance the air loop. Simulations can be of assistance to these two tasks. However, the models used in the simulation will inevitably have some uncertainties, especially for the models of the pressure loss components. This paper proposes to use uncertainty...
Article
Occupancy data is a critical input parameter for building energy simulation since it has a big impact on the precision and accuracy of building energy model performance. However, current approaches to get such data through the conventional occupancy detection technology require either implementation of a large-scale sensor network and/or sophistica...
Conference Paper
High-quality occupancy data is the key input parameter for building energy simulations and has a big impact on the precision and accuracy of building energy model performance. However, current approaches to get such data through the occupancy detection technology require either implementations of large-scale sensors network or sophisticated and tim...
Article
Traditional energy planning methods are mostly related to newly-built area. However, in most already-built regions, the existing district energy systems (DESs) need to be ameliorated due to insufficient capacity and low efficiency. This paper investigates the methodology of expansion planning, which can offer planners a viable way to expand existin...
Article
Full-text available
HVAC system is one of the biggest contributors to building energy use, and meanwhile a considerable part of energy is wasted due to the faulty operation of it. Hence, detecting and diagnosing HVAC system faults and improving energy efficiency are of large economic and environmental impact worldwide. However, the current study or application is high...
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
Full-text available
Two long-existing problems of conventional windows are that: first, they cause serious energy losses in a building; and second, they deteriorate indoor ventilating conditions. To solve this problem, a new design of a Solar Ventilated Window (SVW) is presented in this paper in order to reduce building energy consumption and ameliorate indoor ventila...
Article
Full-text available
The vertical topologies of HVAC water systems in supertall buildings are one major concern, which yet has been determined in experience-based manners. This papers, therefore, proposes a computational optimization procedure to search optimal design of system topologies, as well as component sizing and control settings. To reduce the computational ef...
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
Inhomogeneous airflow distribution is common in air-conditioned rooms, especially the large open spaces. To evaluate the thermal comfort of such space, or the control performance of the Heating, Ventilation, and Air Conditioning (HVAC) systems in an efficient way, one will need a fast prediction method to simulate the airflow and temperature distri...
Article
Demand Response (DR) aims at improving the operation efficiency of power plants and grids, and it constitutes an effective means of reducing grid risk during peak periods to ensure the safety of power supplies. One key challenge related to DR is the calculation of load baselines. A fair and accurate baseline serves as useful information for resourc...
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...
Article
Global climate change and energy crises have increasingly impeded the sustainable development of society and economy. With an accelerated process of urbanization and improved standards of living, China has become the largest carbon emitter in the world and therefore has great responsibility and great potential to mitigate global carbon emissions. A...
Article
Full-text available
Most of the local pressure loss coefficient (LPLC) models for duct fittings used in heating, ventilation and air conditioning (HVAC) air-side system transient simulations are simplified. The LPLCs are defined as having a constant value at the rated flow condition or as having a polynomial function of the flow ratio (or velocity ratio). To determine...
Article
Full-text available
Mitigating carbon emission efforts in urban planning and design phase have become increasingly popular due to climate change. However, it is difficult to verify whether the carbon mitigation target could be achieved for a new city in the absence of quantitative analysis methods. About 100 new cities have emerged every year in the past decades, yet...
Article
Full-text available
Intergrating heat recovery can improve the coefficient of performance (COP) of adsorption refrigeration system, and stratified storage enables recovery of a large fraction of the total heat that can be recovered in an ideal cycle. In some applications, like solar cooling or CHCP, the stratified storage unit used for heat recovery between adsorption...
Article
Full-text available
Residential building sector is one of the major contributors to global electricity energy consumption. Current researches have demonstrated that the residential building energy consumption is determined by many factors, including climate conditions, household and building characteristics, and occupant behavior. However, the extent to which each fac...
Conference Paper
Full-text available
As an efficient way to balance the supply and demand of electricity, demand response (DR) has been implemented in developed countries and attract attention of China. A growing number of DR programs begin to aim at commercial and residential customer groups. A demand response (DR) pilot program was implemented in Shanghai, 2014. A large commercial b...
Article
Demand response (DR) is an efficient method to flatten the demand curves of end-use customers. This paper studies the feasibility of an adsorption heat pump in the DR of a residential building under winter operating conditions. Stratified storage is introduced into the stratified heat pump system to realize heat recovery, which is also used as a bu...
Article
Accurately modeling thermal storage and discharge plays a pivotal role in predicting the peak savings of demand response buildings. Considerable studies have been conducted on the transient thermal behavior of building envelopes, much of which has focused on the thermal mass effects of building envelopes and floors. However, it is unclear how to pr...
Article
Most modern buildings are equipped with building energy management and control systems (EMCSs). These systems can store tremendous amounts of data on buildings' performance and energy usage. A significant amount of data on buildings' mechanical devices, particularly electricity-consumption data, is now available for analysis. However, the quality o...
Article
Building energy consumption accounts for a large portion of total energy-use in a city or a regional district. However, energy load spatial distribution has seldom been considered during urban design phase. And energy conservation and energy efficiency measures pay more attention to individual building than buildings in a district or regional space...
Article
The proposed energy performance diagnosis is intended to identify poor energy performance in a building and pinpoint the causes to provide suggestions for building operators to implement timely repair and maintenance. Many previous studies have probed the complicated problem of building energy performance diagnosis to achieve energy conservation an...
Article
Commercial building demand response control is an effective way to reduce summer electrical peak demand in cities. However, a portfolio of a large number of buildings has different DR control strategies than individual buildings. In this paper, we propose an optimization method for scheduling DR strategies for multiple commercial buildings that can...
Article
Demand response (DR) has become an increasingly important part of building control. However, before building owners and operators agree to participate in DR programs with utility companies, a knowledge of the maximum peak load that can be shifted in their buildings, as well as the economic benefits, is required. Engineers need to be able to predict...
Conference Paper
Full-text available
Traditional direct sub-metering method suffers from high cost and installation difficulties in the actual construction. Especially, the HVAC end-use energy consumption measurement is extremely difficult, because it is always mixed together with lighting-plug submeter or power submeter. This paper presents a approach based on the Fourier series mode...
Article
Full-text available
A passive cooling system combining the phase change materials (PCMs) and night ventilation is modelled with Energy Plus for residential buildings in Shanghai. By simulating the main parameters such as property of PCMs and ventilation rate that affect the system design, an initial scheme is given out and the feasibility is proved with a little sacri...
Article
Full-text available
Predicting short term electricity load accurately is critical to facilitate demand side management in the building sector. For buildings that have electricity sub-metering systems installed, it is possible to predict both the total electricity load and the loads of individual building service systems (air conditioning, lighting, power, and other eq...
Article
Full-text available
Energy consumption monitoring and regulation on large-scale public buildings are always an indispensable part in building energy conservation. With the mounting establishment of the building sub-metering platform, massive amounts of historical power consumption data are provided. In this paper, different building types of six large-scale public bui...
Conference Paper
Full-text available
In this study, we develop a quadratic homogeneous polynomial (QHP) regression model for predicting chillers and present its online tuning strategy. First, sample data is processed using the ordinary least square (OLS) method to obtain the initial QHP model. Second, errors occurred during on-site monitoring are categorized based on which data-proces...
Conference Paper
Full-text available
A good wind and thermal environment of residential districts can speed up the outdoor heat and pollutant dissipation, as well as ensure the comfort and health of residents. The thermal environment in residential districts is affected mainly by layout form, building shape, underlying surface characteristics, etc. In this paper, a residential area lo...
Article
BESMs (building energy simulation models) play an important role in the design, optimization and retrofit of buildings. Developing a BESM is relatively simple in the building design phase because nearly all inputs are known from design parameters. However, in the building operation phase, developing and calibrating a BESM becomes difficult because...
Article
Full-text available
These days, many studies are about the performance of some shading devices. Many engineers think the performance of internal shading systems is inferior to external systems. Because when using internal shades, the solar heat has already entered the internal spaces and has become trapped. However, in real applications, external shading is difficult...
Article
Full-text available
Shading system plays a significant role in reducing building energy demand. To analyse the performance of a shading system, traditional method is either conducting experimental tests for solar heat gain coefficient (SHGC) or through detailed energy simulation for energy saving during specific period. But no simulation tool is able to accomplish the...
Article
Full-text available
One major obstacle encountered in building energy conservation and retrofit is the lack of detailed energy submetering data. Direct submetering is expensive and sometime very difficult to be installed in real practice. For example, the HVAC terminal end-use electricity consumption is extremely difficult to measure, because its data is always mixed...
Article
This study compared and analyzed both the energy savings and cost-effectiveness of various energy-saving technologies retrofitted to common buildings in China. Base models for an office and store building, set in representative climate zones of China—Beijing, Shanghai, and Guangzhou—were established and calibrated in EnergyPlus, a building energy s...
Chapter
Full-text available
Urban patterns have dramatic influences on wind flow among city area, which have become much more obvious along with the process of urbanization and high density development. While at the same time, the expectation of comfortable living environment and high energy efficiency has emerged and become a general agreement. Under these circumstances, thi...
Conference Paper
Full-text available
Building energy consumption not only accounts for a large proportion of total energy consumption in a region, but also impacts building environment quality which affects people's living quality and work efficiency. So it has deep significance to get better building environment by less energy consumption and less emission reduction method. In this p...
Article
In the traditional concept, the performance of internal shading system is inferior compared with that of external one. In actual projects, however, external shadings are subject to severe limitations due to the damage of artistic appearance in building design, the high initial investment and the difficult maintenance in the late stage. Besides, in...
Article
This paper described a new kind of seasonal ventilated window. It analyzed the principle of seasonal shading ventilated window and the influence of outdoor air flow rate and solar radiation on the air flow pattern and building energy consumption. Models of different angle, bottom gap distance, crack height of inner window and optimized these parame...
Article
In this study, a kind of concentrated solar cooling, heating and power (CSCHP) system is analyzed by exergy method. When solar trough receiver obtains energy from sun and radiates heat energy to the external environment, the optimized operation temperature that balance the process is predicted based on exergy index and external environment temperat...
Article
Full-text available
Air distribution and temperature field in data center are key factors in thermal environment evaluation and energy conservation transformation. At present, Computational Fluid Dynamics is a common tool to analyze air distribution and temperature field in data center. It's essential to improve its accuracy through improving the model establishment o...
Article
Full-text available
Energy consumption of gas-fired infrared radiant and heat exchanger by convection heating is comparative analyzed, CFD software is used to simulate fields of the temperature and the predicted percentage of dissatisfied. Based on the profiles analysis of comfort index, it is found that the radiant panel can save over 10% than convection heating when...
Article
Full-text available
There has been a boom of Class A office buildings in Shanghai in recent years. Due to the high requirements of indoor environment in Class A office buildings, these buildings typically consume larger energy than other office buildings. To have a picture of how these buildings perform in terms of energy, a survey was conducted recently. This survey...
Article
Full-text available
Evaluation index of data center judges the operation of data center and provides strong evidence for energy conservation transformation of data center. All kinds of evaluation index of data center thermal environment are summarized. Each index has its specific physical intention and emphasis, and the combination use of these index can evaluate the...
Article
Laterite has high void ratio, low density, high moisture content, high plasticity, but it does not match with their physical nature, which has the relatively high strength and low compressibility. In order to improve the strength of laterite and increase its compactness, we usually use the method of dynamic compaction in some large engineering proj...
Conference Paper
Full-text available
Future hourly Typical Meteorological Year (TMY) weather file is a prerequisite for utilization of building energy simulation software to estimate the impact of global climate change on building energy demand. On basis of Intergovernmental Panel on Climate Change - IPCC’s latest predictions, this paper produces future TMYs of three representative ci...
Article
This research was conducted to evaluate the design of hospital ultraviolet germicidal irradiation (UVGI) systems and to assess their effectiveness for inactivating airborne mycobacteria. A computational fluid dynamics (CFD) model was developed and tested by simulating previous experiments measuring the effectiveness of a lab-based UVGI system. Mode...