Gordhan Das Walasai

Dr. Gordhan Das Walasai

Department of Mechanical Engineering, Quaid-e-Awam University of Engineering, Science and Technology, Nawabshah 67450, Pakistan
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Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 November 2019 in Ecological Indicators
Verified
Journal Article
Closed access
Syed Ahsan Ali ShahSyed Ahsan Ali Shah
Syed Ahsan Ali Shah
PZP. Zhou
P. Zhou
Gordhan Das WalasaiGordhan Das Walasai
Gordhan Das Walasai
MMM. Mohsin
M. Mohsin

1 November 2017 in Renewable and Sustainable Energy Reviews
Verified
Journal Article
Closed access
NMNayyar Hussain Mirjat
Nayyar Hussain Mirjat
MUMohammad Aslam Uqaili
Mohammad Aslam Uqaili
KHKhanji Harijan
Khanji Harijan
Gordhan Das WalasaiGordhan Das Walasai
Gordhan Das Walasai
FSFaheemullah Shaikh
Faheemullah Shaikh
MWM. Waris
M. Waris

1 May 2017 in Renewable and Sustainable Energy Reviews
Verified
Journal Article
Closed access
Gordhan Das WalasaiGordhan Das Walasai
Gordhan Das Walasai
MUMuhammad Aslam Uqaili
Muhammad Aslam Uqaili
HMHafeezUr Rahman Memon
HafeezUr Rahman Memon
SSSaleem Raza Samoo
Saleem Raza Samoo
NMNayyar Hussain Mirjat
Nayyar Hussain Mirjat
KHKhanji Harijan
Khanji Harijan

1 December 2018 in Energy
Verified
Journal Article
Closed access
NMNayyar Hussain Mirjat
Nayyar Hussain Mirjat
MUMuhammad Aslam Uqaili
Muhammad Aslam Uqaili
KHKhanji Harijan
Khanji Harijan
Gordhan Das WalasaiGordhan Das Walasai
Gordhan Das Walasai
AMAlam Hossain Mondal
Alam Hossain Mondal
HSHasret Sahin
Hasret Sahin

25 February 2019 in Processes
Verified
Journal Article
Open access
PDF file
Yasir Ahmed SolangiYasir Ahmed Solangi
Yasir Ahmed Solangi
QTQingmei Tan
Qingmei Tan
NMNayyar Hussain Mirjat
Nayyar Hussain Mirjat
Gordhan Das WalasaiGordhan Das Walasai
Gordhan Das Walasai
Muhammad Waris Ali KhanMuhammad Waris Ali Khan
Muhammad Waris Ali Khan
MIMuhammad Ikram
Muhammad Ikram
Pakistan has long relied on fossil fuels for electricity generation. This is despite the fact that the country is blessed with enormous renewable energy (RE) resources, which can significantly diversify the fuel mix for electricity generation. In this study, various renewable resources of Pakistan—solar, hydro, biomass, wind, and geothermal energy—are analyzed by using an integrated Delphi-analytical hierarchy process (AHP) and fuzzy technique for order of preference by similarity to ideal solution (F-TOPSIS)-based methodology. In the first phase, the Delphi method was employed to define and select the most important criteria for the selection of RE resources. This process identified four main criteria, i.e., economic, environmental, technical, and socio-political aspects, which are further supplemented by 20 sub-criteria. AHP is later used to obtain the weights of each criterion and the sub-criteria of the decision model. The results of this study reveal wind energy as the most feasible RE resource for electricity generation followed by hydropower, solar, biomass, and geothermal energy. The sensitivity analysis of the decision model results shows that the results of this study are significant, reliable, and robust. The study provides important insights related to the prioritizing of RE resources for electricity generation and can be used to undertake policy decisions toward sustainable energy planning in Pakistan.

15 November 2017 in Energies
Verified
Journal Article
Open access
PDF file
SRSyed Aziz Ur Rehman
Syed Aziz Ur Rehman
YCYanpeng Cai
Yanpeng Cai
RFRizwan Fazal
Rizwan Fazal
Gordhan Das WalasaiGordhan Das Walasai
Gordhan Das Walasai
NMNayyar Hussain Mirjat
Nayyar Hussain Mirjat
Energy planning and policy development require an in-depth assessment of energy resources and long-term demand forecast estimates. Pakistan, unfortunately, lacks reliable data on its energy resources as well do not have dependable long-term energy demand forecasts. As a result, the policy makers could not come up with an effective energy policy in the history of the country. Energy demand forecast has attained greatest ever attention in the perspective of growing population and diminishing fossil fuel resources. In this study, Pakistan’s energy demand forecast for electricity, natural gas, oil, coal and LPG across all the sectors of the economy have been undertaken. Three different energy demand forecasting methodologies, i.e., Autoregressive Integrated Moving Average (ARIMA), Holt-Winter and Long-range Energy Alternate Planning (LEAP) model were used. The demand forecast estimates of each of these methods were compared using annual energy demand data. The results of this study suggest that ARIMA is more appropriate for energy demand forecasting for Pakistan compared to Holt-Winter model and LEAP model. It is estimated that industrial sector’s demand shall be highest in the year 2035 followed by transport and domestic sectors. The results further suggest that energy fuel mix will change considerably, such that oil will be the most highly consumed energy form (38.16%) followed by natural gas (36.57%), electricity (16.22%), coal (7.52%) and LPG (1.52%) in 2035. In view of higher demand forecast of fossil fuels consumption, this study recommends that government should take the initiative for harnessing renewable energy resources for meeting future energy demand to not only avert huge import bill but also achieving energy security and sustainability in the long run.