Page 93 - GRIHA Manual Volume I - Introduction to National Rating System
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80 Griha Manual: Volume 1
Criterion 18 Renewable energy utilization
Objective
To use renewable energy sources in buildings to reduce the use of conventional/fossil-fuel-based
energy resources.
18.1 Commitment
18.1.1 Renewable energy system (solar, wind, biomass, fuel cells, and so on) with a rated capacity
of a minimum of 1% of internal lighting load (for general lighting*) and space conditioning
or its equivalent is installed on site. Calculations of energy requirements shall be based on
realistic assumptions, which are subject to verifi cation.
18.1.2 On-site renewable energy system sized to meet the minimum of the above load. Feasibility
of the proposed renewable energy system to be verifi ed by the competent authority.
Note Internal lighting load is the total connected load in kW (kilowatts) for lighting equipment (lamp and accessories). In case it is
proposed to use renewable energy sources for applications other than lighting, the criterion of energy consumption equivalent of energy
consumption of 1% of lighting load (for general lighting*) and space conditioning should still be met. This shall, however, exclude the
water heating loads for which each separate criterion applies.
18.2 Compliance
The following documents should be submitted.
18.2.1 Detailed listing of connected load for lighting and space conditioning in the prescribed
format.
18.2.2 Calculation of connected load for lighting and energy requirement for the same.
18.2.3 List of all loads that are being powered by renewable energy sources (other than lighting
load) and their energy requirements.
18.2.4 Design calculations for renewable energy system sizing and performance including annual
energy generation.
18.2.5 Cut sheets of renewable energy systems with necessary details.
18.2.6 Drawings in CAD format to show location of renewable energy systems.
18.3 Appraisal (maximum points – 5)
18.3.1 Rated capacity of proposed renewable energy system is equal to or more than 1% of internal
lighting and space conditioning connected loads or its equivalent in the building (1 point–
mandatory), as per all compliance clauses.
18.3.2 Rated capacity of proposed renewable energy system meets annual energy requirements of
equal to or more than 5% of internal lighting consumption or its equivalent in the building
(1 point), as per all compliance clauses.
18.3.3 Rated capacity of proposed renewable energy system meets annual energy requirements
of equal to or more than 10% of internal lighting consumption or its equivalent in the
building (2 point), as per all compliance clauses.
18.3.4 Rated capacity of proposed renewable energy meets annual energy requirements of equal
to or more than 20% of internal lighting consumption or its equivalent in the building, as
per all compliance clauses (3 points).
* exemptions as per clause 7.3 of ECBC would apply.
Criterion 18 Renewable energy utilization
Objective
To use renewable energy sources in buildings to reduce the use of conventional/fossil-fuel-based
energy resources.
18.1 Commitment
18.1.1 Renewable energy system (solar, wind, biomass, fuel cells, and so on) with a rated capacity
of a minimum of 1% of internal lighting load (for general lighting*) and space conditioning
or its equivalent is installed on site. Calculations of energy requirements shall be based on
realistic assumptions, which are subject to verifi cation.
18.1.2 On-site renewable energy system sized to meet the minimum of the above load. Feasibility
of the proposed renewable energy system to be verifi ed by the competent authority.
Note Internal lighting load is the total connected load in kW (kilowatts) for lighting equipment (lamp and accessories). In case it is
proposed to use renewable energy sources for applications other than lighting, the criterion of energy consumption equivalent of energy
consumption of 1% of lighting load (for general lighting*) and space conditioning should still be met. This shall, however, exclude the
water heating loads for which each separate criterion applies.
18.2 Compliance
The following documents should be submitted.
18.2.1 Detailed listing of connected load for lighting and space conditioning in the prescribed
format.
18.2.2 Calculation of connected load for lighting and energy requirement for the same.
18.2.3 List of all loads that are being powered by renewable energy sources (other than lighting
load) and their energy requirements.
18.2.4 Design calculations for renewable energy system sizing and performance including annual
energy generation.
18.2.5 Cut sheets of renewable energy systems with necessary details.
18.2.6 Drawings in CAD format to show location of renewable energy systems.
18.3 Appraisal (maximum points – 5)
18.3.1 Rated capacity of proposed renewable energy system is equal to or more than 1% of internal
lighting and space conditioning connected loads or its equivalent in the building (1 point–
mandatory), as per all compliance clauses.
18.3.2 Rated capacity of proposed renewable energy system meets annual energy requirements of
equal to or more than 5% of internal lighting consumption or its equivalent in the building
(1 point), as per all compliance clauses.
18.3.3 Rated capacity of proposed renewable energy system meets annual energy requirements
of equal to or more than 10% of internal lighting consumption or its equivalent in the
building (2 point), as per all compliance clauses.
18.3.4 Rated capacity of proposed renewable energy meets annual energy requirements of equal
to or more than 20% of internal lighting consumption or its equivalent in the building, as
per all compliance clauses (3 points).
* exemptions as per clause 7.3 of ECBC would apply.
