1. Monitoring and Assessment of Sustainability
2. Lean / Six sigma Management
3. Conventional and Alternative Energy Resources
4. Air and Air Pollution Control
5. Sustainable Technology Systems

1. Energy efficiency and rebound effect
2. Energy related occupant behaviour
3. Building energy modelling
4. Energy policy
5. Natural ventilation and air conditioning
6. Wave energy
7. Environmental engineering

Journal papers

1. Edirisinghe, R.D. and Pathirana, S., 2021. Reduction potential of potable water consumption at urban households: a case study in Sri Lanka. Environment, Development and Sustainability, pp.1-18. https://link.springer.com/article/10.1007/s10668-021-01234-1
2. Rajapaksha, L., Gunathilake, D.M.C.C. and Pathirana, S.M., 2021. Reducing post-harvest losses in fruits and vegetables for ensuring food security–Case of Sri Lanka. MOJ Food Process Technols, 9(1), pp.7-16. https://medcraveonline.com/MOJFPT/reducing-post-harvest-losses-in-fruits-and-vegetables-for-ensuring-food-security-ndash-case-of-sri-lanka.html
3. Pathirana, S., Halwatura, R. and Rodrigo, A., 2020. Sustainable approach to energy rating system for residential buildings. Asian Journal of Civil Engineering, 21(8), pp.1331-1342. https://link.springer.com/article/10.1007/s42107-020-00280-w
4. Pathirana, S., Rodrigo, A. and Halwatura, R., 2019. Effect of building shape, orientation, window to wall ratios and zones on energy efficiency and thermal comfort of naturally ventilated houses in tropical climate. International Journal of Energy and Environmental Engineering, 10(1), pp.107-120. https://link.springer.com/article/10.1007/s40095-018-0295-3
5. Pathirana, S. and Yarime, M., 2018. Introducing energy efficient technologies in small-and medium-sized enterprises in the apparel industry: A case study of Sri Lanka. Journal of Cleaner Production, 178, pp.247-257. https://www.sciencedirect.com/science/article/abs/pii/S0959652617332687
6. Pathirana, S. and Heenkenda, N., 2011. Pricing strategies in the garment manufacturing industry in Sri Lanka. Annual Research Journal of SLSAJ, 11, pp.84-91. https://www.researchgate.net/publication/236954844_PRICING_STRATEGIES_IN_THE_GARMENT_MANUFACTURING_INDUSTRY_IN_SRI_LANKA

Conference papers

1. Pathirana, S.M., Perera, N.P.T. and Jayasinghe, K.T., 2020. Treatment of adhesive tape manufacturing wastewater using coagulation. In Proceedings of the National Engineering Research Symposium (NERS 2020)(Vol. 1, pp. 202-208).
2. Pathirana, S.M. and Halwatura, R.U., 2020. Effect of occupant behaviour on household energy efficiency in Sri Lanka. In Proceedings of the National Engineering Research Symposium (NERS 2020)(Vol. 1, pp. 170-176).
3. Karunathilake, W.K.U.V., Halwatura, R.U. and Pathirana, S.M., 2018, May. Optimization of Thermal Comfort in Sri Lankan Residential Buildings. In 2018 Moratuwa Engineering Research Conference (MERCon)(pp. 150-155). IEEE. https://ieeexplore.ieee.org/abstract/document/8421978
4. Pathirana, S.M. and Halwatura, R.U., 2017. An Assessment of rooftop solar PV policies and domestic energy use: Scenario of Sri Lankan residential sector. In Proceedings of the 10^th International Built Environment Research Conference
5. Pathirana, S.M., Sheranie, M.D.M. and Halwatura, R.U., 2017, May. Indoor thermal comfort and Carbon Dioxide concentration. In 2017 Moratuwa Engineering Research Conference (MERCon)(pp. 401-406). IEEE. https://ieeexplore.ieee.org/abstract/document/7980518
6. Pathirana, S.M. and Halwatura, R.U., 2016. Investigating the adaptability of existing building energy rating systems to sri lankan residential buildings. http://dl.lib.uom.lk/handle/123/12451
7. Pathirana, S. and Yarime, M., 2013. Functions of Stakeholders for Diffusion of Energy Efficiency Technologies in Small and Medium Sized Enterprises: A Case Study of the Sri Lankan Apparel Industry. In Proceedings of the International Symposium on Sustainable Systems & Technologies, ISSST2013. https://repository.ust.hk/ir/Record/1783.1-93706

8. Edirisinghe, R. D., and Pathirana, S., Blue water footprint of precast concrete masonry units: A case study in Sri Lanka. In 8th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS 2021). October 2021

9. Babalagama, M.,and Pathirana, S., Optimum utilization of daylighting in office buildings. In 2021 Moratuwa Engineering Research Conference (MERCon). IEEE. July 2021