Keywords: Thermal performance, Building component-Roof, Building material, Innovation, Monitoring.
To Innovate and analyse thermal performance of roof component in hot and dry climate– A case of Bhuj- Kutch
– To develop a roofing component with locally available material.
– To identify and explore the potential of the material as a roofing component for thermal performance in an economical way.
– To monitor thermal performance of selected configurations of the roofing components on-site.
– Comparative Analysis of thermal performance of roofing components.
– Identification of materials used in selected region.
– Understanding properties of different materials selected for the study.
– Finalising materials for testing based on the above conclusions drawn from the comparative chart.
– Exploring methods to make roofing component for economically weaker sections.
– To evaluate the properties of selected material as a roofing component with its limitations, strengths and weaknesses.
– As per the above conclusion, the testing unit will be designed.
– On-site execution of the designed module for further study for thermal evaluation.
– Continuous monitoring of individual modules in regular intervals.
– Thermal performance analysis and conclusions.
– Scope of the study is limited to flat roof exposed to the sun in hot & dry climate.
– Thermal performance is being considered for the roof only; thermal comfort is not in the scope.
– Thermal performance is measured by on-site monitoring only.
– Study is conducted in summer months only.
Innovation of systems
– To bridge the gap between the traditional knowledge with the present conventional architecture with limitations of materials & craftsmanship, considering ecological, economical and social sustainability.
– Based on the material inventory, Innovation & exploration is done in the fields of:
Development of Mud Rolls (With Lime, Surkhi & Fly-ash)
|Sr. no||Proportion by volume||Density gm/cm3|
|Clay Soil||Lime Slurry||Surkhi||Fly-ash|
Paper Tubes for Load Testing
|length (cm)||Inner dia (cm)||Outer dia (cm)||Guage (cm)|
|centre to centre||76.5|
|Displacement Readings||CSEB Block (9.6 each)||Weight|
Thatch Panel Alternatives for Testing
|Sample||Block proportion (in litre)|
|Clay Slurry||Lime Slurry||Saw Dust||Surkhi||Fly-ash||Wheat||Rice Straw||Water|
|Modules||Max Int. roof surface temp||Time lag (in hrs)||Temp. reduction of surface (in deg cel)|
|Mud Roll with Ferrocrete||38.7||4||15.3|
|Paper Tube with Ferrocrete||37.1||2||16.1|
|Lime Roll with Country tiles||37||6||12.8|
|Mud Roll with Country tiles||36.7||6||13|
|paper Tube with Country tiles||35.7||4||13.9|
|Clay panel with Country tiles||39.4||6||7.6|
Research started with an aim to develop roofing component which would determine high thermal performance as well as cost effectiveness in the case of hot and dry climate in Bhuj. The experiments were carried out with roofing materials: Mud roll, Clay panel and Paper tubes. Although Clay panels containing flyash with lime and flyash with surkhi did not respond positively in terms of strength for its insufficient binding, the rest other materials demonstrated a positive inclination towards the aim.In the process of material development, reduction in the density of mud roll is achieved by 50% as compared to the standard sample of mud roll. Thermal performance analysis reveals that the newly developed modules exhibit similar thermal performance as that of the standard sample of mud roll. The combination of waste material like paper tube with clay tiles and ferrocrete have equal scope for the development as a roofing component.All the modules developed with alternative materials under this study testify to better thermal performance as compared to tin sheet and RCC. In the case of Ferrocrete-Mud rolls and Ferrocrete-Paper tubes, though the external layer is same for both, there is a difference in their thermal performances. When compared, the external surface temperature of Ferrocrete-Paper tubes rise faster, yet, drops down quicker than ferrocrete- Mud rolls. Paper tube- CT, Lime roll-CT, Mud roll- CT, and Clay panel- CT are the four roofing components which show minimum internal surface temperature levels as compared to other modules at the time when external ambient temperature is maximum.In comparison with the above four modules, Paper tube- CT has its internal surface temperature lower during the morning and evening time when the external ambient temperature starts falling. This depicts, Paper tube- CT performs relatively better as compared to the other options under evaluation. Although cost is considered same across all the modules, the configuration is found to be more economically viable over others.Positive results in the development of roofing component demonstrate that there is a scope for an integrated research of the material from a point of material innovation and thermal performance with economic viability.
Future Scope of Research
Roofing modules showing positive results in the development process can be taken forward for further refinement in terms of improving material composition and improved thermal performance.
Merely for a study purpose standard samples of alternative materials were used for the analysis of thermal performance. Individual variants of the Mud Rolls, Clay straw panels and Paper tube panels can be similarly analyzed and developed further.
Papertubes posses greater potential as a structural member and exhibit high thermal performance. It can be taken forward to a greater extent as it is one of the major wastages found in many packaging industries; they are easily available.
In addition, Papertubes could be tested for thermal performance by introducing double layer with varying diameters and varying gauge thickness.
|About the Author|
|Ar. Veerendranath Satrasala upon completing his B.Arch from BVB College of Engineering and Technology went about to pursue Master’s Degree in Sustainable Architecture from CEPT University, Ahmedabad and parallely studied MBA in Construction Management from IIBM Meerut.
He is a proprietor of Espeevee Architects and Interior Designers, Raichur, established in 2014 and singlehandedly manages different scales of this domain right from residences, offices and commercial complexes, hospitality and institutions, temple complexes and alternative technologies towards a healthy ecosystem.
He strongly believes in integrated design and works towards sustainable sensitive architecture via, his forte, holistic design approach. His focus relies on exploring sustainable practices, in a deeper and wider context, in different hierarchies of this domain.
His involvement in conservation projects and competitions has strengthened his principles over a long period in architecture discipline. He holds high regards to Hunnarshala Foundation, their community and artisans, at Bhuj-Kutch for having taught the strength in simplicity as also shaping his belief in ecologically sensitive work culture.
A few of his noted works are Meliorated Adil Shahi Monument at Aliyabad, Bijapur; Temple Conservation and Redevelopment at Yedur and a Nomination Dossier of Badami, Aihole and Pattadkal for UNESCO under the guidance of Ar. Gitanjali Rao. He has received many accolades for his innovative building technology with the use of rice straw bales, paper tube panels, wheat straws; a few to mention.