Generator Air Intake and Exhaust Regulations

The term ‘specified generator’ covers an individual generator or a number of generators if they’re: 1. on the same site 2. operated by the same operator 3. for the same purpose (generating electricity) Generators are still classed as operating for the same purpose if they’re: 1. using different fuels or technologies 2.. . Both the MCPDand specified generator regulations can apply to generators. If your site includes a medium combustion plant that generates electricity you must check if your generator: 1. is. . Specified generator controls, unless excluded, apply to generators with a rated thermal input between 1MWth and 50MWth. They also apply to generators less than 1MWth, if they: 1. have a capacity agreement or an. . These generators are excluded from specified generator controls. For a MCP that generates electricity you must also check if the MCP is excluded from the MCPD controls. . Some operators have more time to get their permit in place and comply with permit conditions (this is called a transitional arrangement).. [pdf]

FAQS about Generator Air Intake and Exhaust Regulations

What are the code requirements for generator exhaust?

To investigate code requirements for generator exhaust it is important to start by reviewing the International Mechanical Code® (IMC). Section 915 of IMC 2018 regarding Engine and Gas Turbine-Powered Equipment and Appliances is applicable stating: 915.1 General.

Does high temperature pressurized generator exhaust meet code requirements?

UL listed products utilized for high temperature pressurized generator exhaust meet code requirements. To investigate code requirements for generator exhaust it is important to start by reviewing the International Mechanical Code® (IMC). Section 915 of IMC 2018 regarding Engine and Gas Turbine-Powered Equipment and Appliances is applicable stating:

Does engine generator set meet emissions requirements?

Engine generator set shall meet emissions requirements as determined by AHJ. Type your questions, comments, feedback in the WebEx Q&A box. We will get to as many questions as we can

Do I need a permit for a generator?

Both the MCPD and specified generator regulations can apply to generators. If your site includes a medium combustion plant that generates electricity you must check if your generator: Check using the guidance on Medium combustion plant: when you need a permit. These generators are excluded from specified generator controls.

What temperature should a field fabricated generator exhaust be insulated?

To protect potential personal contact with the system, the outer shell temperature must be below 140°F. These temperature calculations can and should be performed by the UL listed manufacturer based on specific product design criteria. Field-fabricated generator exhaust also requires insulation.

Do generators have to meet ELV requirements?

The emission limit values (ELVs) and air quality standards specified generators must meet, including the deadlines for complying. If your generator’s capacity is more than 1 megawatt thermal you may also need to comply with the medium combustion plant ELV requirements.

Generator exhaust temperature

On the high-end side of the expense scale is a temperature probe unit, or thermocouple, which is embedded in some portion of the exhaust system or cylinder head and sends data automatically. Once installed, tracking exhaust temperatures would be a snap. The drawback to this system is the price: they’re. . A less costly, and more practical option involves the use of infrared instruments. With this approach, however, the question of where to obtain the readings becomes the issue. The best place to get the highest readings is at the. . If a facility is unable to make the 30% of nameplate rating and does not have the exhaust temperatures that demonstrate the generator is sufficiently loaded, an annual supplemental “load run” will need to be performed. As stated. [pdf]

Generator room exhaust shutters

The genset and its equipment (control panel, fuel tank, exhaust silencer, etc.) are integral together and this integrity should be considered during the design phase. The genset room floor should be liquid-tight to prevent leakage of oil, fuel, or cooling liquid into nearby soil. The generator room design must also comply. . The door width/height of the genset room should be such that the genset and its equipment can easily be moved into the room. Genset equipment (fuel tank, silencer, etc.) should be positioned close to the genset (Figure 1).. . Ventilation of the genset room has two main purposes. They are to ensure that the life-cycle of the genset does not shorten by operating it correctly and to provide an environment. . The exhaust system (silencer and pipes) is installed to reduce the noise from the engine and to direct the toxic exhaust gases to appropriate areas. Inhalation of exhaust gases is a. . The fuel tank design must comply with fire protection requirements. The fuel tank should be installed in a concrete or metal bund. The ventilation of the tank should be carried outside of the. [pdf]