India amends emission limits for new engines used for power generating set applications with up to 800 kW gross mechanical power 
On February 18, 2022, the Indian Ministry of Environment, Forest and Climate Change (MoEFCC) issued the Environment (Protection) first Amendment Rules, 2022 to amend the emission limits for new engines used for power generating set applications with up to 800 kW gross mechanical power. The Rules cover engines such as diesel engines and Bi-fuel engines running either on gasoline or certain alternative fuels, and establish emission limits (parameters: NOx, HC, CO, PM, etc.) for each, based on engine type and displacement. The revised Rules will take effect on July 1, 2023. The current provisions regarding noise limits will remain in effect.
The Environment (Protection) first Amendment Rules, 2022 can be downloaded from the following URL (in Hindi and English).
https://egazette.nic.in/WriteReadData/2022/233621.pdf
New engines to be covered
- Diesel engines
- Engines that use dedicated alternate fuels
- Bi-fuel engines running either on gasoline or alternate fuels
- Dual fuel engines running on diesel and alternate fuels
- Portable generator sets (PI engines below 19 kW and up to 800 cc displacement) running on gasoline fuel, dedicated alternate fuels, and Bi-fuel (either on gasoline or alternate fuels)
*“Alternate fuels” are defined in the guideline “System and Procedure for Compliance to Emission Limits for Power Generating Set Applications.” The related guidelines can be found at the following URL.
https://cpcb.nic.in/guidelines/
Emission limits (effective from July 1, 2023)
- Emission limits for engines used for power generating set applications up to 800kW gross mechanical power driven by all CI engines and PI engines with engine displacement exceeding 800cc
| Power category (kW) |
NOx |
HC | NOx+HC | CO | PM | Smoke (light absorption coefficient) | ||
| CI/PI | CI/PI | CI/PI | CI/PI | CI | PI | CI |
PI |
|
|
g/kWh |
m-1 | |||||||
|
P ≤ 8 |
― |
― | 7.5 | 3.5 | 0.30 | ― | 0.7 |
― |
|
8 < P ≤ 19 |
― |
― | 4.7 | 3.5 | 0.30 | ― | 0.7 |
― |
|
19 < P ≤ 56 |
― |
― | 4.7 | 3.5 | 0.03 | 0.7 |
|
|
|
56 < P ≤ 560 |
0.40 |
0.19 | ― | 3.5 | 0.02 | ― | 0.7 |
― |
| 560 < P ≤ 800 | 0.67 | 0.19 | ― | 3.5 | 0.03 | ― | 0.7 |
― |
- Emission limits for engines used for portable power generating set up to 19kW powered by PI engines of 800cc engine displacement or less
|
Engine displacement (cc) |
CO |
NOx +HC |
|
g/kWh |
||
|
Up to 99 |
< 250 |
< 10 |
|
> 99 and ≤ 225 |
< 250 |
< 08 |
| > 225 and ≤ 800 | < 250 |
< 06 |
Other provisions include the option of test methods to evaluate engine deterioration factors (see Table 3) and deterioration factors (see Table 4). In addition, as general conditions for new engines used for power generating set applications that are manufactured or assembled in India or imported into India and operate at constant or variable speeds, domestic manufacturers, importers, or assemblers are required to obtain Type Approval and to display a conformance label. However, the rules do not apply to products intended for export outside India, sample test products not intended for sale in India and exported within six months, and products assembled, manufactured, or imported for the purpose of research and development and ultimately scrapped or re-exported.
