Beijing Tsinghua Urban Planning and Design Institute

Beijing, China

Beijing Tsinghua Urban Planning and Design Institute

Beijing, China
Time filter
Source Type

Chen Z.-F.,Beijing Normal University | Chen Z.-F.,Beijing Tsinghua Urban Planning and Design Institute | Gu L.-S.,Beijing Tsinghua Urban Planning and Design Institute | Chen J.,Beijing Normal University | Li Q.,Beijing Normal University
Journal of Natural Disasters | Year: 2010

The feature of peoples evacuation needs that are improved gradually along with the evacuation time going decides the hierarchy stucture of emergency shelters in location and spatial distribution. This paper firstly defines three types of hierarchical emergency shelters as temporary shelter, short-term shelter and long-term shelter. Based on the analysis of relation between evacution needs and hierarchy structure of emergency shelters,the paper reveals the characteristics of single-flow,nested services and spatial no-coherency in hierarchy stucture of emergency shelters.

Liu S.,Tsinghua University | Wang H.,Tsinghua University | Xu P.,Beijing Tsinghua Urban Planning and Design Institute | Xu S.,Beijing Tsinghua Urban Planning and Design Institute
Qinghua Daxue Xuebao/Journal of Tsinghua University | Year: 2013

Supervisory control and data acquision (SCADA) systems are used to estimate the energy consumption and water quality in water distribution systems (WDS). The number and locations of the monitoring stations are generally selected prior to the SCADA layout; thus, the station placement is critical. The aim of this study is to develop a method to optimally locate monitoring stations as a multiobjective optimization problem. The problem is solved using a multiobjective genetic algorithm (MOGA) which maximizes the number of covering nodes and the monitoring station demand. This method is then combined with the topology and a hydraulic sensitivity analysis of burst pipes in a large-scale urban WDS. Monitoring stations in only 0.3% of the nodes can monitor 45% of the nodes and 43% of the demand in a large urban network. The result matches the performance with the layout. The method improves monitoring station placement accuracy and balances the influence of node pressure and demand. In addition, this reduces jamming and provides information for improved operations in terms of energy consumption, leakage and bursting.

Li J.,Beijing Tsinghua Urban Planning and Design Institute | Li C.,Tsinghua University | Li X.,Tsinghua University
10th International Conference on Healthy Buildings 2012 | Year: 2012

Subway, as a prevalent transportation system now being widely applied in China, needs a well-designed indoor air quality for the safety and health of passengers. Since the train travels in a relatively closed tunnel, the air quality inside the carriage depends significantly on the air quality in the tunnel. It is important to control the air quality in the tunnel in the practical operation of the subway system. To test the air quality and ventilation rate in two typical subway tunnels in China, two field measurements are conducted by detecting the CO2 concentration. Testing data shows that these two tunnels are both qualified. The distribution and the variation of the CO2 concentration are thoroughly studied.

Li Y.,Beijing Tsinghua Urban Planning and Design Institute | Li C.,Tsinghua University | Li X.,Tsinghua University
10th International Conference on Healthy Buildings 2012 | Year: 2012

Natural ventilation has a significant impact on energy consumption for cooling of buildings. It can bring various advantages for buildings, including saving energy, improving indoor thermal comfort and indoor air quality. However, due to ineffective and unreliable methods of simulation, the potential of natural ventilation cannot be estimated precisely. This paper proposes a new index, annual cooling load saving ratio (ACSR), for the evaluation of natural ventilation in practice. To realize this evaluation standard, DeST-VentPlus, using multi-zonal net model combined with building thermal model embodied in DeST, is introduced to the annual situations of natural ventilation Based on DeST-VentPlus, the energy conservation potential of natural ventilation in 5 cities in China is analyzed. Both the building types and the climate condition are discussed in the paper, which could guide natural ventilation design of buildings in different regions in future.

Yan H.,Beijing Forestry University | Yan H.,Zhejiang Agriculture And forestry University | Fan S.,Beijing Forestry University | Guo C.,Beijing Forestry University | And 3 more authors.
PLoS ONE | Year: 2014

The effects of land cover on urban-rural and intra-urban temperature differences have been extensively documented. However, few studies have quantitatively related air temperature to land cover composition at a local scale which may be useful to guide landscape planning and design. In this study, the quantitative relationships between air temperature and land cover composition at a neighborhood scale in Beijing were investigated through a field measurement campaign and statistical analysis. The results showed that the air temperature had a significant positive correlation with the coverage of man-made surfaces, but the degree of correlation varied among different times and seasons. The different land cover types had different effects on air temperature, and also had very different spatial extent dependence: with increasing buffer zone size (from 20 to 300 m in radius), the correlation coefficient of different land cover types varied differently, and their relative impacts also varied among different times and seasons. At noon in summer, ∼37% of the variations in temperature were explained by the percentage tree cover, while ∼87% of the variations in temperature were explained by the percentage of building area and the percentage tree cover on summer night. The results emphasize the key role of tree cover in attenuating urban air temperature during daytime and nighttime in summer, further highlighting that increasing vegetation cover could be one effective way to ameliorate the urban thermal environment. © 2014 Yan et al.

Liu L.,University of Science and Technology Beijing | Fu L.,Tsinghua University | Zhang S.,Beijing Tsinghua Urban Planning and Design Institute
Applied Energy | Year: 2014

A great deal of heat is wasted in intensive public shower facilities, such as those in schools, barracks and natatoriums, which open up at specified time. It will contribute a lot to energy saving and environmental protection with significant economic benefits to recycle the exhaust heat. In this paper, we propose two different kinds of heat pumps (an electric heat pump and an absorption heat pump) in the heat recovery systems. In both system, the used shower water is drained through a pipe and collected in a gray water pool. When the wastewater reaches certain volume, the heat pump system will begin working and recycling heat. The wastewater is filtered and piped to the heat exchanger to exchange heat with the tap water whose temperature will increase from 12. °C to 25. °C with the wastewater temperature dropping from 30. °C to 17. °C. Then the wastewater is piped to the heat pump evaporator and the tap water is piped to the condenser for farther heating. According to the different characteristics of the electric heat pump and absorption heat pump, we also introduce the processes and control methods of different heat recovery systems in details in this paper. Based on a practical example, this paper analyzes and compares the economic and environmental benefits of three retrofitting schemes, including "exhaust heat recovery using electric heat pump", "exhaust heat recovery using electric heat pump. +. gas boiler" and "exhaust heat recovery using direct-fired heat pump". Then we find out that the heat recovery system using direct-fired absorption heat pump has lower energy consumption, less pollution, lower operating cost, and shorter payback period. And it has a promising practical application. © 2014 Elsevier Ltd.

Lin W.-Q.,Tsinghua University | Zheng X.-J.,Beijing Tsinghua Urban Planning and Design Institute
Proceedings - 2012 International Conference on Biomedical Engineering and Biotechnology, iCBEB 2012 | Year: 2012

Urban construction and other human activities have been changing the local and regional ecosystems and causing a lot of ecological problems. After reviewing the problems happened, this paper presents a theoretical framework of ecological researches analyzing what should be done to meet the needs and the orders of the natural patterns and processes. This framework is now used in our project of the national park study in the northwestern region of Yunnan province, southwest of China. © 2012 IEEE.

Lin W.,Tsinghua University | Yu T.,Beijing Tsinghua Urban Planning and Design Institute
2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings | Year: 2011

China is now practicing the rural construction to narrow the gap between the urban and rural areas. Consequently, tens of millions of dollars are pumped into rural areas. To guarantee the social equity and achieve the economic efficiency, however, where or which villages should accept the investment? This paper aims to forming a technical flow details on how to pick out the exact built locations of public service facilities from great lots of counties with preconditions that the distribution and size of counties are invariable. We consider the issue as a set covering problem that can be resolved by spatial analysis technique. This method is used to locate different levels of school in Linzhou, Henan province, China. Results show that this method has a great maneuverability in practice. © 2011 IEEE.

Konig H.J.,Leibniz Center for Agricultural Landscape Research | Konig H.J.,University of Potsdam | Zhen L.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research | Helming K.,Leibniz Center for Agricultural Landscape Research | And 6 more authors.
Land Degradation and Development | Year: 2014

The goal of China's sloping land conversion programme (SLCP) is to combat soil erosion and to reduce rural poverty. An ex-ante assessment of possible SLCP impacts was conducted with a focus on rural sustainability, taking the drought-prone region of Guyuan in Western China as an example. The Framework for Participatory Impact Assessment (FoPIA) was used to conduct two complementary impact assessments, one assessing SLCP impacts at regional level and a second one assessing alternative forest management options, to explore possible trade-offs among the economic, social and environmental dimensions of sustainability. Regional stakeholders assessed the SLCP to be capable of reducing soil erosion but felt it negatively affected rural employment, and a further continuation of the Programme was advocated. Assessment of three forest management scenarios by scientists showed that an orientation towards energy forests is potentially beneficial to all three sustainability dimensions. Ecological forests had disproportionate positive impacts on environmental functions and adverse impact on the other two sustainability dimensions. Economic forests were assessed to serve primarily the economic and social sustainability dimensions, while environmental impacts were still tolerable. The FoPIA results were evaluated against the available literature on the SLCP. Overall, the assessment results appeared to be reasonable, but the results of the regional stakeholders appeared to be too optimistic compared with the more critical assessment of the scientists. The SLCP seems to have the potential to tackle soil erosion but requires integrated forest management to minimize the risk of water stress while contributing to economic and social benefits in Guyuan. © 2012 John Wiley & Sons, Ltd.

Song Z.,Beijing Tsinghua Urban Planning and Design Institute | Lin W.,Beijing Tsinghua Urban Planning and Design Institute
2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings | Year: 2011

Natural ecosystem is the base for city residents, especially for the city in oasis like Kashgar. Kashgar is now in the process of the construction of Special Economic Zone, which will bring tremendous pressure to the local ecosystem. Maintaining the sustainability of local ecosystem needs to investigate its service functions. This paper aims to calculating the ecosystem service values in Kashgar from 1998 to 2009. We identified five different urban natural ecosystems, and addressed four local and direct services: climate regulation, gas regulation, soil formation and environmental purification. Results show that the total ecosystem service values of Kashgar first ascend from 1998 to 2005 and then drop from 2005 to 2009, indicate that the ecosystem services function is great influenced by the size of orchard and forest land, illustrate that increasing the area orchard and forest land is the most effective way to raise the ecosystem service values in Kashgar. © 2011 IEEE.

Loading Beijing Tsinghua Urban Planning and Design Institute collaborators
Loading Beijing Tsinghua Urban Planning and Design Institute collaborators