0244-9370381-85    Ext.    2622

Experience:

Current Research:
Low carbon development pathways
Water constraints in future power generation
Demand-side modelling of power sector
Smart grid - techno-economic feasibility modelling

Courses Currently Teaching:
Renewable Energy and Emerging Technologies

Courses Taught Previously:
Power Plants
Pollution Analysis and Control
Renewable Energy Resources
Tribology

Publications:
Journal


1. Xu, Li, Ying Wang, Syed Ahsan Ali Shah, Hashim Zameer, Yasir Ahmed Solangi, Gordhan Das Walasai, and Zafar Ali Siyal. "Economic Viability and Environmental Efficiency Analysis of Hydrogen Production Processes for the Decarbonization of Energy Systems." Processes 7, no. 8 (2019). https://doi.org/10.3390/pr7080494. (IF=1.963)

2. Shah, S. A. A., P. Zhou, G. D. Walasai, and M. Mohsin. "Energy Security and Environmental Sustainability Index of South Asian Countries: A Composite Index Approach." Ecological Indicators 106 (2019). https://dx.doi.org/10.1016/j.ecolind.2019.105507. (IF=4.49)

3. Abdullah Mengal, Nayyar Hussain Mirjat, Gordhan Das Walasai, Shoaib Ahmed Khatri, Khanji Harijan and Mohammad Aslam Uqaili, “Modeling of Future Electricity Generation and Emissions Assessment for Pakistan, Processes 2019, 7(4), 212; doi: https://doi.org/10.3390/pr7040212 (IF=1.963)

4. Yasir Ahmed Solangi, Qingmei Tan, Nayyar Hussain Mirjat, Gordhan Das Valasai, Muhammad Waris Ali Khan, Muhammad Ikram, “An Integrated Delphi-AHP and Fuzzy TOPSIS Approach Towards Ranking and Selection of Renewable Energy Resources in Pakistan”, Processes 2019, 7(2), 118; doi:10.3390/pr7020118 (IF=1.963)

5. Syed Aziz Ur Rehman, Yanpeng Cai, Nayyar Hussain Mirjat, Gordhan Das Walasai, Mohammad Nafees, (2019), “Energy-environment-economy nexus in Pakistan: Lessons from a PAK-TIMES model”, Energy Policy, 126 (2019), https://doi.org/10.1016/j.enpol.2018.10.031 (IF = 4.88)

6. Abid Ali Khaskheli, Gordhan Das Walasai, Abdul Sattar Jamali, Qadir Bakhsh Jamali, Zafar Ali Siyal, Abdullah Mengal, (2018), “Performance Evaluation of Locally-Produced Waste Cooking Oil Biodiesel with Conventional Diesel Fuel”, Engineering, Technology & Applied Science Research, Vol. 8, No. 6, 2018, 3521-3524.

7. Abdul Nasir Laghari, A. Rajper, Gordhan Das Walasai, Abdul Rehman Jatoi, Nabi Bux Jalbani, Hira Soomro, (2018), “Assessment of Climate Driven Changes in Flow Series of Alpine Basin: A Case Study of Danube River Basin”, Engineering, Technology & Applied Science Research, Vol. 8, No. 6, 2018, 3505-3507.

8. Nayyar Hussain Mirjat, Muhammad Aslam Uqaili, Khanji Harijan, Gordhan Das Walasai, Md Alam Hossain Mondal, Hasret Sahin, (2018), “Long-term electricity demand forecast and supply side scenarios for Pakistan (2015 - 2050): A LEAP model application for policy analysis”, Energy 165 (2018) 512-526, https://doi.org/10.1016/j.energy.2018.10.012 (IF = 5.537)

9. Abdul Nasir Laghari, Gordhan Das Walasai, Abdul Rehman Jatoi, Nabi Bux Jalbani, Faheem Akhtar Shaikh, (2018), “Performance Analysis of Water Filtration Units for Reduction of pH, Turbidity, Solids and Electricity Conductivity”, Engineering, Technology & Applied Science Research, Vol. 8, No. 4, 2018, 3209-3212.

10. Abdul Nasir Laghari, Gordhan Das Walasai, Abdul Hanan Shaikh, Daddan Khan Bangwar, Zafar Ali Siyal, (2018), “Analysis of Mapping Techniques for Mountain Precipitation: A Case Study of Alpine Region, Austria”, Engineering, Technology & Applied Science Research, Vol. 8, No. 4, 2018, 3213-3217.

11. Abdul Nasir Laghari, Gordhan Das Walasai, Abdul Rehman Jatoi, Daddan Khan Bangwar, Abdul Hanan Shaikh, (2018), “Effects of Climate Change on Mountain Waters: A Case Study of European Alps”, Engineering, Technology & Applied Science Research, Vol. 8, No. 4, 2018, 3234-3237.

12. Syed Ahsan Ali Shah, Gordhan Das Valasai, Asif Ali Memon, Abdul Nasir Laghari, Nabi Bux Jalbani and Jody L. Strait, (2018), “Techno-Economic Analysis of Solar PV Electricity Supply to Rural Areas of Balochistan, Pakistan”, Energies, 11(7), 1777, https://doi.org/10.3390/en11071777 (IF = 2.707)

13. AN Laghari, ZA Siyal, DK Bangwar, MA Soomro, G Walasai, FA Shaikh, (2018), “Groundwater Quality Analysis for Human Consumption: A Case Study of Sukkur City, Pakistan”, Engineering, Technology & Applied Science Research, Vol. 8, No. 1, 2616-2620.

14. Abbas, Z., Harijan, K., Shaikh, P., Walasai, G. D., Ali, F. (2017), “Effect of Ambient Temperature and Relative Humidity on Solar PV System Performance: A Case Study of Quaid-e-Azam Solar Park, Pakistan”, Sindh University Research Journal-SURJ (Science Series), Vol. 49, No. 4, 721-726.

15. Suhail Ahmed Shaikh, Nayyar Hussain Mirjat, Wajahat Shabbir Korejo, Gordhan Das Walasai, Abdul Sattar Larik, Arsalan Hussain, (2017), “Electricity Demand Forecasting: A Pakistan’s Perspective”, Asian Journal of Engineering, Sciences & Technology, Vol. 2, Issue 1, September 2017.

16. Syed Aziz Ur Rehman, Yanpeng Cai, Mohammad Nafees, Gordhan Das Walasai, Nayyar Hussain Mirjat, Wajid Rashid, (2017), “Overcoming electricity crisis in Pakistan: An overview of the renewable energy status and development in Pakistan”, Journal of Environmental Accounting and Management, Volume 5, Issue 4, pp. 357-383.

17. Rehman, S., Cai, Y., Fazal, R., Das Walasai, G., & Mirjat, N. (2017). An Integrated Modeling Approach for Forecasting Long-Term Energy Demand in Pakistan. Energies, 10(11). https://doi:10.3390/en10111868 (IF = 2.707)

18. Rehman, S., Cai, Y., Mirjat, N., Das Walasai, G., Shah, I., & Ali, S. (2017). The Future of Sustainable Energy Production in Pakistan: A System Dynamics-Based Approach for Estimating Hubbert Peaks. Energies, 10(11), 23. https://doi:10.3390/en10111858 (IF = 2.707)

19. T. A. Memon, K. Harijan, M. I. Soomro, S. Meghwar, G. D. Valasai, H. Khoharo, (2017), “Potential of Electricity Generation from Rice Husk-A Case Study of Rice Mill”, Sindh Univ. Res. Jour. (Sci. Ser.) Vol. 49, No. 2, 49-54 (2017)

20. Nayyar Hussain Mirjat, Mohammad Aslam Uqaili, Khanji Harijan, Gordhan Das Valasai, Faheemullah Shaikh, M. Waris, (2017), “A Review of Energy and Power Planning and Policies of Pakistan”, Renewable and Sustainable Energy Reviews, 79 (2017) pp. 110–127. DOI: 10.1016/j.rser.2017.05.040, (IF = 10.556)

21. Gordhan Das Valasai, Nayyar Hussain Mirjat, Muhammad Aslam Uqaili, Hafeez ur Rahman Memon, Saleem Raza Samoo, and Khanji Harijan, (2017), “Decarbonization of Electricity Sector of Pakistan – An Application of TIMES Energy Model”, Journal of Clean Energy Technologies, Vol. 5, No. 6.

22. A. Mengal, K. Harijan, M. A. Uqaili, N. H. Mirjat, G. D. Valasai, (2017), “Mitigation of GHG Emissions with a 50 MW Wind Power Plant: A Case Study of Pakistan”, Sindh Univ. Res. Jour. (Sci. Ser.) Vol. 49, No. 1, 49-54.

23. Gordhan Das Valasai, Muhammad Aslam Uqaili, Hafeez Ur Rahman Memon, Saleem Raza Samoo, Nayyar Hussain Mirjat, Khanji Harijan, (2017), “Overcoming electricity crisis in Pakistan: A review of sustainable electricity options”, Renewable and Sustainable Energy Reviews, 72 (2017) pp. 734–745. DOI: 10.1016/j.rser.2017.01.097, (IF = 10.556)

24. Valasai, G. D., Uqaili, M. A., Memon, H. R., Samoo, S. R., Mirjat, N. H. and Harijan, K., (2016), "Assessment of Renewable Energy for Electricity Generation: Using Pakistan TIMES Energy Model", Sindh Univ. Res. Jour. (Sci. Ser.) Vol. 48 (4) 775-778 (2016).



Conference Proceedings


1. Suhail Ahmed Shaikh, Nayyar Hussain Mirjat, Wajahat Shabbir Korejo, Gordhan Das Walasai, Abdul Sattar Larik, Arsalan Hussain, “Electricity Demand Forecasting: A Pakistan’s Perspective”, presented at 2nd International Conference of Emerging Trends in Engineering Sciences and Technology (ICEEST-17) held at Iqra University, Karachi, Pakistan, August 25, 26, 2017.

2. Nayyar Hussain Mirjat, Gordhan Das Valasai, Mohammad Aslam Uqaili, Khanji Harijan, Syed Feroze Shah, Abdullah Mengal, “Ranking of Scenario Alternatives for Sustainable Power Generation in Pakistan”, presented at 5th International Conference on Sustainable Energy and Environmental Sciences (SEES 2017), Singapore, March 06-07, 2017.

3. Gordhan Das Valasai, Nayyar Hussain Mirjat, Muhammad Aslam Uqaili, Hafeez Ur Rahman Memon, Saleem Raza Samoo, Khanji Harijan, "Decarbonization of Electricity Sector of Pakistan – An Application of TIMES Energy Model", presented at 5th International Conference on Power Science and Engineering (ICPSE 2016), Venice, Italy, December 14-17, 2016.

4. Gordhan Das Valasai, Muhammad Aslam Uqaili, Hafeez Ur Rahman Memon, Saleem Raza Samoo, Khanji Harijan, Nayyar Hussain Mirjat, “Development of PakistanTIMES Energy Model for Least Cost Power Generation Options”, presented at 19th Annual Conference on Global Economic Analysis – Analytical Foundations for Cooperation in a Multipolar World, The World Bank, Washington DC, USA, June 15-17, 2016.

5. Valasai, G. D., Köksal, M. A., “Düşük Ekonomik ve Çevresel Maliyetli Elektrik Üretim Seçeneklerinin Modellenmesi ve Analizi”, 6. Ulusal Hava Kirliliği ve Kontrolü Sempozyumu, Ankara, Turkey, 7-9 October, 2015.

6. Nayyar Hussain, M. Aslam Uqaili, Khanji Harijan, Gordhan Valasai, “Pakistan’s Energy System: Integrated Energy Modelling and Formulation of National Energy Policies”, presented at 14th International Conference on Sustainable Energy Technologies – Sustainable Energy for a Resilient Future (SET 2015 Nottingham), The University of Nottingham, UK, from 25 to 27 August, 2015. ISBN 7-80853583-14-1.

7. Valasai, G. D., Uqaili, M. A., Memon, H. R., and Harijan K. “Electricity Demand Forecast in the Agricultural & the Services Sector of Pakistan”, 1st International Conference on Energy, Environment, and Sustainable Development for Growing Economies (EESD2009), Mehran University of Engineering and Technology, Jamshoro, Pakistan, May 04 – 06 May, 2009.

8. Valasai, G. D., Uqaili, M. A., and Memon, H.R., “Identification of issues in the power sector of Pakistan”, Proceedings, Second National Conference on “Energy and Environment: Issues, Concerns and Options”, Department of Energy and Environment Engineering, Quaid-e-Awam University of Engineering, Sciences and Technology, Nawabshah, pp. 23-29, March 27-29, 2008.

9. Valasai, G. D., Uqaili, M. A., Memon, H. R., “Heavy Reliance on Thermal Power and Potential of Renewable Energy Sources for Pakistan”, Paper presented at the Energex 2007, the 12th International Conference and Exhibition, Suntec Convention Centre, Singapore, 26-30 November 2007.

10. Valasai, G. D., Uqaili, M. A., and Memon, H.R., “Electricity demand forecast in the Domestic Sector of Pakistan”, Proceedings, National Conference on Assessment and Proper Utilization of Indigenous Energy Sources and Their Environmental Impacts, Department of Energy and Environment Engineering, Quaid-e-Awam University of Engineering, Sciences and Technology, Nawabshah, pp. 114-123, February 26-28, 2007.

11. Memon, H.R., Uqaili, M. A., Valasai, G. D. and, and Panhwar, M.I., “Analysis of the Power Generation Energy Sources in Pakistan”, paper presented and published in the proceedings of the International Conference on Environment (ICENV 2006), Grand Plaza Parkroyal, Batu Ferringhi, Penang, Malaysia, 13-15 November 2006.

12. Uqaili, M. A., Valasai, G. D., and Memon, H. R., “Increasing demand of electricity and role of coal in developing countries”, published in Proceedings of International Conference on Environmental Management 2005, (ICEM-2005), Jawaharlal Nehru Technological University, Kukatpally, Hyderabad, Andhra Pradesh, India.

13. Uqaili, M. A., Valasai, G. D., and Memon, H.R., “Meeting Electricity Demand through Coal Based Power Generation in Pakistan”, Paper presented at Third Pakistan Oil, Gas & Energy Exhibition and Conference, 19 – 21 May 2005, Expo Centre, Karachi.

14. Uqaili, M. A., Valasai, G. D., and Memon, H. R., “Meeting Power Generation choices for Pakistan in the presence of diminishing fuel resources and environmental constraints”, presented at International Conference on Environmental Horizons, December 19 – 21, 2005, University of Karachi, Karachi.

15. Valasai, G. D., Uqaili, M. A., Memon, H. R., and Khanji Harijan, “Impact of Greenhouse Gases on Agricultural Productivity in Pakistan”, the paper published in the proceedings of the First International Conference on Environmentally Sustainable Development, ESDev–2005, 26–28 June 2005, Abbottabad.


BOOK CHAPTER WRITTEN

1. Valasai, G. D., Uqaili, M. A., Memon, H. R. and Harijan, K., “Forecasting Electricity demand for Agricultural and Services Sector of Pakistan”, Book Chapter in Uqaili and Harijan (Eds.), Energy, Environment and Sustainable Development, Springer-Verlag/Wien, 2011, pp.59-67. ISBN 978-3-7091-0108-7 (Print) 978-3-7091-0109-4 (Online)

Professional Memberships:
International Association for Energy Economics
Pakistan Engineering Council
Editorial Board, QUEST Research Journal