Meng Han

As China’s rural revitalization progresses, the green and sustainable development of traditional dwellings has gained significant attention. Traditional Qiang dwellings in western Sichuan, located in high-altitude cold regions, often feature thick walls and small windows, limiting air circulation. Buffer spaces play a key role in improving indoor air quality and reducing energy consumption through natural ventilation. This study explores traditional Qiang dwellings in western Sichuan through field research, architectural analysis, and numerical simulations. The study analyzes three buffer space types and compares natural ventilation in dwellings with and without buffer spaces. The results show better air circulation in buildings with buffer spaces. The simulation further shows that when the courtyard’s aspect ratio is 1.3 and the width-to-height ratio is 0.9, ventilation and air renewal rates are optimized. Based on this, the study proposes natural ventilation optimization strategies to reduce reliance on mechanical systems and improve energy efficiency. The study provides a scientific basis for low-carbon Qiang dwelling design and offers practical strategies for improving living environments, supporting sustainable rural development.

As urbanization accelerates in developing countries and populations continue to grow, the demand for sustainable urban regeneration becomes increasingly urgent. This study explores how urban regeneration can be integrated with tourism development to promote sustainable and inclusive growth. Using the theory of organic regeneration, this study emphasizes the role of localized, small-scale interventions that enhance the urban environment while boosting tourism appeal. Through field research at the Tianjin Cruise Terminal, this study applies the KANO model to classify user needs and prioritize design interventions based on the needs of various user groups, including tourists, exercisers, anglers, and local residents. By analyzing user group activity frequencies, the study identifies Must-be, One-dimensional, and Attractive needs, and utilizes weight analysis to assess the impacts of different facilities on user satisfaction. This approach ensures that the design guidelines effectively address both essential and value-enhancing features. The findings provide more suitable design guidelines for improving tourism infrastructure, promoting sustainable development, and enhancing the overall urban experience.

In this study, the standard tent used by the China International Medical Team (Sichuan) was used as the research object to study the internal temperature change in medical tents in a low-temperature environment relying on heating equipment. Method: Four temperature sensors were arranged along the horizontal direction at a 1.2 m height in the medical tent, and more sensors were installed at heights of 0.1, 0.2, 0.6, 1.2, 1.8, 2.4, and 2.5 m. A total of 11 temperature sensors were set. Temperature tests were conducted in January and February 2021 in Chengdu, Sichuan Province. During the test, the running time of the heating equipment was controlled in real time according to the temperature change trend. A Kolmogorov–Smirnov(K-S) test was used to verify the reliability of the experimental data. The temperature change trend was used to characterize the influence of the heating and cooling equipment on the temperature change inside the tent. Results: Due to the position angle of the heating equipment and the influence of the external environment, the spatial distribution of the ambient temperature inside the medical tent was obviously uneven. In winter, an electric heater with a heating power of about 2500 W can increase the internal temperature of the tent to 16.7 °C, significantly improving the internal thermal environment of the medical tent. The ambient temperature in the medical tent is positively correlated with the height and the installation position of the heating equipment. Conclusion: Medical tents can maintain the ambient temperature well to meet medical needs with the support of heating equipment with sufficient power. The temperature distribution law of medical tents in this experiment has good guiding significance for the placement angle of heating equipment and the configuration position of medical equipment and provides a reference for the development of thermal insulation materials for medical tents.

This paper aims to study the required solar panel tilt angle, area, and investment payback period for achieving zero-energy heating in historically significant courtyard-style residential buildings. The retrofitting approach involves positioning solar panels on the main building of the structure using four supports, each located at the corners, elevated from the ground and not in direct contact with the building. This approach does not alter the external envelope structure of the building, thereby preserving the authenticity of the cultural heritage. Using BESI software, we simulated the heating energy demand of the sample building. We integrated a solar heating system within the building and analyzed the optimal solar panel layout area, installation angle, and payback period for achieving zero-energy heating. This allowed the building to meet the zero-energy heating requirements. Taking the Hu Family Courtyard heritage conservation building as an example, we proposed the optimal layout plan for solar energy retrofitting.

The mulberry fiber is extracted from the mulberry bast by biochemical degumming method. Based on the single factor experiment, the orthogonal experiment is further designed. The optimal process parameters for biochemical combined degumming are as follows: pretreatment stage, sulfuric acid solution concentration 2.5g/L, time 1h, temperature 60°C, bath ratio 1:20; alkaline pectinase treatment stage, alkaline pectinase solution concentration 46g/L, time 8h, temperature 50°C, bath ratio 1:20, solution pH = 9; alkali boiling stage, sodium hydroxide solution concentration 10g/L, alkali boiling time 3h, sodium silicate 30g/L, temperature 100°C, bath ratio 1:20; xylanase treatment stage, the concentration of xylanase solution 9g/L, the time 4h, the temperature 50°C, the bath ratio 1:20, and the solution pH = 4.8. By comparing the properties of mulberry fiber obtained by biochemical degumming and chemical degumming, it is found that the biochemical degumming process has less damage to fibers and more effective removal of lignin and hemicellulose.