Page 79 - JCAU-5-1

Journal of Chinese
Architecture and Urbanism Green renovation technology for rural buildings

natural ventilation is insufficient. In the improvement of plan organization, and low space utilization, as well as
indoor light environment, we increase the area of light technical problems, such as poor thermal insulation, poor
opening by increasing the window-wall ratio to strive lighting and ventilation, low indoor comfort, and high
for indoor natural light, at the same time, we can choose energy consumption (Zeng et al., 2018). In view of the
energy-saving lamps and lanterns to ensure low energy current problems of the renovation project, five measures
consumption while improving indoor illumination. In for the green suitability renovation of rural buildings
the design of indoor damp-proofing, the use of easy integrated with regional culture are proposed to achieve
construction and economic use of indoor flooring cement the goal of sustainable development of the renovation
mortar damp-proofing transformation can effectively project adapted to the region.
improve indoor dampness, improve air quality, ensure the
quality of use and durability of structural materials, and 4.1. Green renovation strategy
prevent illness among occupants in areas with high air According to the construction of green appropriate
humidity due to wall mold and flooring dampness. technology system for rural buildings integrated with
regional culture, and in response to the original building
3.5. Renewable energy utilization technologies
problems and owner’s needs, we propose a suitable green
The widespread popularization of safe, clean, renovation strategy that integrates local traditional Hakka
environmentally friendly, and economic solar energy culture, with passive technology as the focus and active
utilization technology in rural areas can effectively change technology as the supplement, to save energy and reduce
the energy consumption pattern of rural areas and ease the consumption, and create a livable and comfortable indoor
situation of energy supply tension. Rural areas can make environment.
full use of abundant solar energy resources due to lower
building density and volume ratio, and less shading and The renovation starts from the following levels:
larger roof areas. In rural areas with abundant rainfall and (i) In terms of creating regional characteristics, mainly
surface water sources, surface water source heat pump reflected in the transformation of the exterior shape of
technology also has great potential for development. the building, the traditional Hakka residential features
In addition, the integrated rooftop photovoltaic design of Nanping Village are retained to echo the features of
as shown in Figure 3 can be carried out to achieve the surrounding buildings.
photoelectricity utilization. (ii) In outdoor environment improvement, regional plants
are used in landscape design, and permeable materials
4. Practice in Nanping Village are used for paving.
The case study of the renovation project is located in (iii) Optimizing the performance of the exterior envelope,
Nanping Village, Conghua District, Guangzhou City, improving the heat insulation and waterproof
which was completed at the end of 2018, and is a villager’s performance of the exterior envelope, such as the
self-built house, which is 7.8 m high, two-story residential exterior walls, windows, and roofs, strengthening
building with brick and concrete structure and a floor natural ventilation, and reducing energy consumption.
area of 168 sqm. Before the renovation, the original (iv) To improve the quality of indoor environment, adjust
building had a poor design, with a dilapidated appearance, the plan organization and functional layout of the
unreasonable layout, a lack of service facilities, disorderly building, make full use of space, and improve the
comfort of the indoor environment, with a view of
creating a high-quality, high-utilization indoor space.
(v) In terms of renewable energy utilization, use renewable
energy, such as solar energy, to save energy and reduce
emissions.

4.2. Green renovation measures
According to the appropriate green transformation strategy,
corresponding transformation measures are adopted to
constitute a technical system with clear objectives and
intensive technology to achieve the purpose of highlighting
regional characteristics, effectively reducing energy
Figure 3. Schematic diagram of overhead PV roof construction. consumption, and improving indoor comfort. Specifically,
Source: Drawing by the author. the measures are as follows:

Volume 5 Issue 1 (2023) 6 https://doi.org/10.36922/jcau.404