Harnessing Solar energy, Options for India

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Figure 20: The Box Cooker (Source: http://mnre.gov.in/solarboxcooker.htm) Figure 21: The Dish Cooker (Source: Trans Solar Technologies) The community (Scheffler) solar cooker seen in Figure 22 uses parabolic reflector dishes to concentrate solar energy on a cooking vessel that allows cooking to take place in a conventional kitchen. The dish is able to track the sun throughout the day to ensure continuous cooking, similar to the dish cooker. Temperatures up to 400°C can be achieved, and it can cater to forty to fifty people. Figure 22: The Community Solar Cooker (Source: CSTEP) 3.2. Concentrated Paraboloid Solar Cooking (CPSC) For cooking in large establishments where hundreds or thousands of people are served, the use of an indirect method for cooking is preferable. Indirect cookers separate the solar energy collection element from the cooking area using a heat transport medium to bring the collected energy into the cooking area. The preferred heat transport medium is water (steam). In the solar steam cooking system, a number of parabolic solar concentrators are deployed to heat water and form steam, which can be effectively used for large-scale cooking in community kitchens. 21 There is an automatic tracking system for the concentrators to track the sun. The CPSC system (Figure 23) is a partial energy delivery system; it cannot act as a standalone system. Diesel or LPG may be used as back-up to generate the steam. Hence, there is no need for a separate cooking arrangement. Solar Thermal Applications CSTEP | Page 96
Figure 23: Schematic of the CPSC (Source: CSTEP) Economic Analysis of the CPSC In this analysis, assumptions are based on data available from multiple existing installations in India. The MNRE uses a normative cost of `18,000/m 2 of collector area. The cost of the solar cooking system (including the concentrators, steam pipes and tracking system) is considered to be around `10,000/m 2 of collector area, based upon the various existing CPSC installations in India, which is substantially lower than the normative cost assumed by the government. a,22 A system that provides 600 meals a day in order to feed 300 people twice a day is considered (Table 26). This requires 300 kg of steam to be produced, 23 and 1 m 2 of concentrator area can usually produce 3.5 kg of steam. If a standard collector size of 7.2 m 2 is used, twelve concentrators (six pairs) are required, which would give a total concentrator area of 86.4 m 2 . Thus, the system cost is approximately `864,000 without subsidy. a An approximate average of seven CPSC installations in India (http://www.teda.gov.in/page/Solar-Ann1.htm). Solar Thermal Applications CSTEP | Page 97
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Harnessing Solar Energy: Options fo
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Foreword Worship the sun god, the L
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4. ADDITIONAL TARIFF PER UNIT OF EL
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Executive Summary The Jawaharlal Ne
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capital subsidy of `150 per W p pro
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policy choices. A comparison of thi
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of PPAs need better clarity. The en
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The Indian power sector is highly d
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4. Solar Technologies: The Basics T
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Introduction CSTEP | Page 26
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Factors affecting performance: Temp
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PV Capacity (MW) in 2008; however,
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Annual Installed Capacity (GW) 5.5.
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Table 2: Timeline of Indian Policy
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India’s Solar-specific Policies C
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Table 4 gives an overview of JNNSM
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On 16 November 2010, bids from sola
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Table 6: Net Present Value of Outla
Page 46 and 47: 4.1.3. Policies for Grid-connected
Page 51 and 52: Cumulative Capacity, Grid Parity an
Page 53 and 54: Electricity Price (`/kWh) The price
Page 55: consumed by the customers will grad
Page 60 and 61: In the case of smaller PV plants, p
Page 62 and 63: decentralised in that banks and oth
Page 64 and 65: 1.2.1.Solar Lanterns 1.2.1.1. Overv
Page 66 and 67: Table 11: Models of Dissemination D
Page 68 and 69: 1.2.3. Solar PV Microgrid 1.2.3.1.
Page 70 and 71: NPV of Govt. Subsidies (` in Lakhs)
Page 72 and 73: Table 12: Capital Cost of Solar-bas
Page 74 and 75: electrification, assuming a solar s
Page 76 and 77: electrical energy output of the arr
Page 78 and 79: Table 18: Estimation of Potential f
Page 80 and 81: The benchmark cost and subsidy for
Page 82 and 83: 14 12 2.47 0.74 10 0.91 0.47 LCOE (
Page 84 and 85: 3.2.1.1. Conclusions Although econo
Page 86 and 87: IRR 3.3. Policy Debate From an inve
Page 88: Table 22: Estimation of Potential f
Page 92 and 93: Solar thermal technologies have a n
Page 94 and 95: Figure 19: Solar Dryer Installation
Page 98 and 99: Table 26: Cost Calculation for a 60
Page 100 and 101: for the residential and commercial
Page 102 and 103: It is difficult to estimate the pot
Page 105 and 106: Appendix - 1 Assumptions in the Sec
Page 107 and 108: Appendix - 2 Grid Integration in Ur
Page 109 and 110: Appendix - 3 Estimation of Commerci
Page 111 and 112: Annexure 2 - List of Figures Introd
Page 113 and 114: Annexure 4 - List of Acronyms AC AC
Page 115 and 116: Annexure 5 - About the Authors Shub
Page 117 and 118: 21 RPS System in Japan, http://www.
Page 119 and 120: 35 Purohit, Pallav, ‘Financial Ev
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Harnessing Solar energy, Options for India

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