Research >> 3. Environmentally Sustainable Buildings >>Evaluation and improvement of Asian traditional house

■ Evaluation and Improvement of Asian Traditional house

□ Evaluation and Improvement of Traditional Houses of Nepal Based on
 Architectural Engineering

Purposes of This Study
  To evaluate and improve the environment and energy issues of the traditional houses in the Banke, Bhaktapur, Dhading, Kaski and Solukhumbu districts of Nepal, thermal environment, indoor air quality and energy consumption were investigated in summer and winter.
 1)Evaluation of the thermal environment: To clarify the indoor and outdoor temperature differences and vertical temperature differences, temperatures were measured in summer and winter.
 2)Evaluation of the thermal comfort: To clarify the comfortable temperature of the residents, thermal comfort survey was carried out in summer and winter.
 3)Evaluation of energy consumption: To clarify the energy consumption, firewood consumption was measured in summer and winter.
 4)Evaluation of indoor air quality: To clarify the indoor air quality, indoor and outdoor air environment were measured in summer and winter.
 5)Improvement of thermal environment and air quality: Traditional houses were improved by airtight of opening, insulation of roof and installation of improved stove.

Figure-1 Map of Nepal

Results of This Study
1) Evaluation of thermal environment
 The indoor and outdoor temperature difference was small in low altitude locations and large in high altitude locations. This is because the houses in low altitude locations are open to outside and the houses in high altitude locations are close to outside. Compared to Japanese houses, the Nepalese houses are similar in indoor and outdoor temperature differences.
2) Evaluation of thermal comfort
 Neutral temperatures are lowest in the cool climate, medium in the temperate climate and highest in the sub-tropical climate. The findings reveal that people in the locations studied adapt well to the natural environment, as a result of which neutral temperatures are different in different climates.
3) Evaluation of firewood consumption
 Firewood consumption was estimated as 235 to 1130kg/person/year. It showed that less firewood in used in the temperate climate than the sub-tropical climate.

Figure-2 Proposal of Traditional House Figure-3 Thermal Environment of House