Jia Ping Liu

Study on Thermal Environment of Traditional Architecture in Tropic Climate

Haikou is located in tropic climates in China. The outdoor environment in summer is too harsh to stay here. However, the traditional architecture, namely arcade, still survives in the severe climate. Its indoor and outdoor parameters of arcade are tested in field to research its thermal environments. The heat stress index is used to study the adaptability mechanism of arcade and local human to hot and humid environment. It proves that the metabolic rate and wind velocity are main and adjustable factors to reduce heat stress in such wretched weather. On the condition of metabolic rate below 60met and wind speed above 0.7m/s, the healthy adult can work normally in the arcade or on the corridor. So the human in tropic area should keep their metabolic rate and period staying out in the summer daytime as less as possible, and the architects should make full use of the local wind speed to organize natural ventilation.

Air Environment and Energy Performance of a Building Courtyard in the Heating Season

Courtyards are now used in many new buildings in China for taking advantage of better natural ventilation and thus improving the microclimate. However, when the building is equipped with a central air-conditioning (AC) system for space heating in winter, the warm air infiltration from the heated rooms enters into the courtyard and leads to changes in the natural ventilation characteristics in the courtyard. In the present study, the air environment and energy performance of a courtyard style office building in Shanghai were monitored in winter. The internal and external environmental parameters such as air temperature, CO2 and particle concentrations were measured simultaneously and continuously when the building was heated or was not in use. The results show that when there is no apparent pollutant source in the courtyard, a better microenvironment can be established and the air quality in the space is almost the same as the ambient air, because its natural ventilation is enhanced by the warm air infiltration from the heated rooms. Compared to a building without a courtyard, the building envelope heat loss can be reduced by 20% or 11% in winter for buildings with or without a corridor facing the courtyard enclosed by glass windows, respectively, due to the warm air infiltration which increases the air temperature in the courtyard.

The Ecological Strategies of Residential Buildings in Qinba Mountain Villages

In recent years, a large number of new residential buildings of villages have a large number of problems which is the traditional residential energy consumption, and local environmental pollution. We Urgently need to explore the appropriate strategies about the level of economic development of the local eco-building technologies in Qinba mountain villages. It is want to improve villagers living standard of living, to make residential buildings comfortable, healthy, energy-saving, and try to find a environmental protection of the local ecological road.

Eco-Friendly Vernacular Rural Housing in Western China: a Case Study of a Reconstruction Project after 2008 Sichuan Earthquake

In the rapid urbanization of rural western China, a variety of long-standing housing typologies are being replaced with energy consuming brick-concrete structures that have little connection to vernacular traditions. To improve this situation, this paper proposes an ecologically sensitive alternative, based on a case study of the design and construction of 44 new dwellings in Daping Village, Sichuan Province, after that area was devastated by the May 12, 2008 earthquake. We propose that this eco-approach may represent a generalizable approach for sustainable development of vernacular architecture in western China.

Numerical Modeling of the Flow and Pollutant Dispersion in Street Canyons with Ground Thermal Effect

Thermal stratification affects the flow in and above urban street canyons. Such thermal effect is often not noticed, and can lead to pessimistic or optimistic results of the air quality in urban street canyons under calm conditions and low wind speeds. A three-dimensional CFD model is applied to simulate the flow patterns and particle concentrations in a street canyon under different aspect ratios and ground thermal conditions. The model is validated by the experimental data found in the literature. The simulation results are used to evaluate the flow and pollutant dispersion properties in the canyon. The results show that the ground thermal conditions can significantly affect the ventilation performance of the street canyon, which improves with the increased temperature difference (ΔT) between the ambient air and the ground of the canyon. The increased ΔT enhances the buoyancy induced secondary flow in the street canyon and hence reduce the particle concentrations in the canyon, with this influence more pronounced for small street widths.

The Analysis on the Green Building Modes of the Traditional Rural Residences in Qinba Mountain Area

In the paper, the characteristics on the construction and structure were analyzed through the field investigation of the traditional rural residences of the Qinba mountain area. On this basis, the passive strategies of the building design on the climate and environment of the Qinba mountain area were analyzed through the field measurements and the computer simulation program in quantitative terms. Finally, the modes on the green building design, which were matched with the local climate and natural conditions of the Qinba mountain area, were summarized. And the guidance and reference for the ecological construction of the rural residences of the Qinba mountain area were provided with the modes on the green building design.

Study on Indoor Environment and Energy Technology of Inner Mongolia Grassland Dwellings

With the development of production and urbanization, many problems such as environmental pollution, energy shortages, ecological degradation, atmospheric warming and so on, have become increasingly serious, which results in that peoples attention of their living environment is further improved. In the wave of national sustainable development, Inner Mongolia autonomous region has come up with certain sustainable development policies since 2001, roundly discussing questions in terms of Inner Mongolia economy, society, resources and environment. The grassland living environment and ecological construction are also included. Taking the grassland habitats typical living formMongolian yurt as an example, this paper analyses the climate adaptability and green ideas of grassland traditional dwellings, according to natural characteristics and energy resources of the grassland. With the purpose to provide valuable references for the sustainable development of grassland, this article points out some present problems and puts forward the corresponding measures of green renewal and ecological design.

A Study on Actual Conditions of Residential Environment in Western Region of China Part 2. A Concept for a Bio-Village in Sunan Yugur Autonomous County

We have directed at the climatic and residential environments and local residents of western China. It is founded on Japan-China joint research, built on physical measurements and questionnaire surveys that enable healthy and sustainable development, on the basis of assessment of the climate and environmental characteristics of western China. Additionally, the project aims at proposing convenient methods to protect people against the adverse health effects of climate change, looking at inhabitants. Focusing our attention on the state of housing in rural parts of Sunan Yugur autonomous county and on the characteristic abundance of natural energy resources, we set out to develop a new model for energy-efficient housing adapted to available natural energy sources. This Bio-Village concept is one of the nomad settlement plan, and in consideration the lifestyle coexisting the traditional life and livestock industry, we aim to achieve compatibility of local business development and energy conservation village.

Test Study of the Thermal Environment in Summer of New and Old Two Types of Rural Houses in QiLian Mountain Northern Foothills Area

This study aimed to analyze the summer indoor thermal environment of new and old two types of rural houses in QiLian Mountain northern foothills area. The method of analysis is field testing. The result shows the relationship between indoor thermal environment and envelope materials, location of rooms. In addition, the influence was Quantified in 1~2° C. Finally, advice put forward to promote the indoor thermal environment.

The Strategies of Passive Energy-Efficiency Design in Low Energy Building

This paper briefly analyzes the structure and conservation approaches of building energy consumption, analyzes the forming reason and influence factors of heating and air-conditioning energy consumption and proposes the passive energy conservation designing strategies of low energy consumption building. Through the passive methods of building design, envelop enclosure and planning landscape, the goal of last year building low energy conservation can be achieved.