Page 80 - JCAU-5-1

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

(i) The building form inherits traditional Hakka culture environmental quality. First, the kitchen area was
and considers the users’ spiritual demands and practical enlarged, dining room, storage room, living room, and
needs. The roof form is based on traditional Hakka roof bathroom were added to meet the needs of daily life and
form, with a combination of flat slope and traditional improve the quality and convenience of life; second,
color of white walls and tiles of Hakka dwellings, which the location of the bathroom was changed to make the
is compatible with the environment of Nanping Village natural wind path smooth, and the window hole in the
in terms of color; the balcony railing vent extracts the north wall was enlarged to enhance the circulation of
typical decorative patterns of Hakka architecture, which the dominant wind in summer; third, the location of the
organically combines form and function. stairwell was adjusted to strive for the south orientation
(ii) In the outdoor environment improvement, plants of the bedroom, which improved the indoor daylighting.
with distinctive regional characteristics such as (v) In terms of resource conservation using renewable
thousand suns, cocklebur, bread tree, and golden resources, a solar photothermal system was added to the
banyan are applied to create rich landscape layers, roof of the residential building to provide domestic hot
while permeable material concrete is used to pave the water, while water-saving appliances were installed, and
outdoor flooring. interior lighting was replaced with energy-saving lamps.
(iii) On the optimization of heat insulation performance
of external enclosed structure, the internal heat 4.3. Comparison of green performance and benefit
insulation of external wall is selected for renovation, analysis before and after retrofitting
new green inorganic coating aluminum silicate heat Through the empirical method, using ECO-TECT
insulation coating is adopted, external windows are software to simulate and compare the ventilation, lighting,
replaced by plastic steel aluminum hollow double- and indoor temperature distribution before and after the
glass windows from original aluminum alloy ordinary project renovation, it can be obtained that:
windows, louvered internal sunshade is added,
roof heat insulation and waterproof renovation, (i) Ventilation effect is significantly improved.
polystyrene foam board heat insulation material is The ventilation of the residential buildings before the
adopted, and indoor flooring is treated with cement renovation was poor, but after the renovation, due
mortar moisture-proof. The typical exterior envelope to the smooth layout of the plan, smooth ventilation
technology and material application used in this paths and increased air circulation space, the indoor
design are shown in Figure 4. wind speed was mostly between 0.83 m/s and 1.66 m/s,
(iv) Rationalization of the original layout and functional and the ventilation was significantly improved.
adjustment to improve space utilization and indoor (ii) Light conditions are obviously optimized.

Figure 4. Examples of envelope technology and material applications. Source: Drawing by the author.

Volume 5 Issue 1 (2023) 7 https://doi.org/10.36922/jcau.404