• R. Gupta, G. N. Tiwari, A. Kumar, Y. Gupta. Calculation of total solar fraction for different orientation of greenhouse using 3d- shadow analysis in auto cad. Energy and Buildings. In press, corrected proof, Available online 1 December 2011.
• Chel A. and Tiwari G.N. (2011), A case study of a typical 2.32 kWP stand-alone photovoltaic (SAPV) in composite climate of New Delhi (India), Applied Energy, 88(4): 1415-1426.
• R. Dev, S.A. Abdul-Wahab, G. N. Tiwari, Performance Study of an Inverted Absorber Solar Still with Water Depth and Total Dissolved Solid. Applied Energy (2011), 88: 252-264.
• R. Dev, H.N. Singh, G. N. Tiwari, Characteristic equation of double slope passive solar still. Desalination (2011), 267: 261-266.
• R. Dev, G. N. Tiwari, Characteristic equation of the inverted absorber solar still. Desalination (2011), 269: 67-77.
• D. Kamthania, S. Nayak, G. N. Tiwari. Energy and exergy analysis of a hybrid photovoltaic thermal double pass air collector, Applied Solar Energy, 2011, Vol. 47, No. 3, pp. 199–206.
• Deepali Kamthania, Sujata Nayak, G. N. Tiwari. Performance evaluation of a hybrid photovoltaic thermal double pass facade for space heating. Energy and buildings.2011; 43 (9): 2274- 2281.
• Sanjay Agrawal, G. N. Tiwari. Energy and exergy analysis of hybrid micro-channel photovoltaic thermal module. Solar Energy 85 (2011) 356–370.
• G. N. Tiwari, R K Mishra, S C Solanki. Photovoltaic modules and their applications: A review on thermal modelling. Applied Energy (2011) Volume: 88, Issue: 7, Publisher: Elsevier Ltd, Pages: 2287-2304.
• M. Jamil Ahmad, G. N. Tiwari. Solar radiation models- A review. International Journal of Energy Research- Volume 35, Issue 4, pages 271–290, 25 March 2011.
• Shiv Kumar and G. N. Tiwari. Analytical expression for instantaneous exergy efficiency of a shallow basin passive solar still. International Journal of Thermal Sciences 50 (2011) 2543-2549.
• Gajendra Singh, Shiv Kumar and G. N. Tiwari. Design, fabrication and performance evaluation of a hybrid photovoltaic thermal (PVT) double slope active solar still. Desalination 277 (2011) 399–406.
• S. Nayak, G. N. Tiwari, Drying and testing of mint (Mentha piperita) by hybrid photovoltaic thermal (PVT) based greenhouse dryer Drying Technology, 29(9), 2011
• P. Agrawal, G. N. Tiwari, Return on capital and earned carbon credit using hybrid solar- wind generator Energy Engineering, 108(4), 2011
• P .Barnwal, G. N. Tiwari, Experimental validation of hybrid photovoltaic – thermal (PV/T) greenhouse dryer under forced mode International Journal of Food Engineering, 6(6), 2011, art no. 17
• M.K. Guar, G. N. Tiwari, S. Kumar, Validation of Thermal models to predict the heat and mass transfer coefficient for indoor simulations. Desalination and Water Treatment, 26(1-3) , 2011
• R. Dev, S.A. Abdul-Wahab, G. N. Tiwari, An energy and exergy analysis of building integrated photovoltaic thermal system Energy Sources, Part A: Recovery, Utilization and Enviromental Effects, 33(7), 2011,
• Sanjay Agrawal and G. N. Tiwari, Performance evaluation of hybrid modified micro-channel solar cell thermal tile: an experimental validation, International Journal of Engineering Science and Technology 3(2011) 244-254.
