7 Del. Admin. Code § 1144-8.0
Current through Register Vol. 28, No. 7, January 1, 2025
Section 1144-8.0 - Credit for Concurrent Emissions Reductions8.1 Flared Fuels. If a generator uses fuel that would otherwise be flared (i.e., not used for generation or other energy related purpose), the emissions that were or would have been produced through the flaring can be deducted from the actual emissions of the generator, for the purposes of calculating compliance with the requirements of this regulation. If the actual emissions from flaring can be documented, they may be used as the basis for calculating the credit, subject to the approval of the Department. If the actual emissions from flaring cannot be documented, then the following default values shall be used: | Emissions | Waste, Landfill, |
| Digester Gases |
| Nitrogen Oxides | 0.1 lbs/MMBtu |
| Particulate Matter | N/A |
| Carbon Monoxide | 0.7 lb/MMBtu |
| Carbon Dioxide | 117 lb/MMBtu |
8.2 Combined Heat and Power. 8.2.1 CHP installations shall meet the following requirements to be eligible for emissions credits related to thermal output:8.2.1.1 At least 20% of the fuel's total recovered energy shall be thermal and at least 13% shall be electric. This corresponds to an allowed power-to-heat ratio range of between 4.0 and 0.15.8.2.1.2 The design system efficiency shall be at least 55%.8.2.2 A CHP system that meets the requirements of CHP installations shall meet the following requirements to be eligible for emissions credits related to thermal output: of this regulation may receive a compliance credit against its actual emissions based on the emissions that would have been created by a conventional separate system used to generate the same thermal output. The credit shall be subtracted from the actual generator emissions for purposes of calculating compliance with the limits in 3.1 or 3.2 of this regulation. The credit will be calculated according to the following assumptions and procedures: 8.2.2.1 The emission rates for CHP facilities that replace existing thermal systems (e.g., boiler) for which historic emission rates can be documented shall be the historic emission rates in lbs/MMBtu, but not more than the emission rates for new facilities that displace a thermal system, which are: | Emissions | Maximum Rate |
| Nitrogen Oxides | 0.2 lbs/MMBtu |
| Particulate Matter | N/A |
| Carbon Monoxide | 0.08 lbs/MMBtu |
| Carbon Dioxide | 117 lbs/MMBtu |
8.2.2.2 The emissions rate of the thermal system in lbs/MMBtu will be converted to an output-based rate by dividing by the thermal system efficiency. For new systems the efficiency of the avoided thermal system will be assumed to be 80% for boilers or the design efficiency of other process heat systems. If the design efficiency of the other process heat system cannot be documented, an efficiency of 80% will be assumed. For retrofit systems, the historic efficiency of the displaced thermal system can be used if that efficiency can be documented and if the displaced thermal system is either enforceably shut down and replaced by the CHP system, or if its operation is measurably and enforceably reduced by the operation of the CHP system.8.2.2.3 The emissions per MMBtu of thermal energy output will be converted to emissions per MWh of thermal energy by multiplying by 3.413 MMBtu/MWhthermal.8.2.2.4 The emissions credits in lbs/MWhthermal, as calculated in 8.2.2.3 of this regulation, will be converted to emissions in lbs/MWhemissions by dividing by the CHP system power-to-heat ratio.8.2.2.5 The credit, as calculated in 8.2.2.4 of this regulation, will be subtracted from the actual emission rate of the CHP unit to produce the emission rate used for compliance purposes.8.2.2.6 The mathematical calculations set out in 8.2.2.1 through 8.2.2.4 of this regulation are expressed in the following formula: Click here to view Image
8.3 Non-Emitting Resources. When electricity generation that does not produce any of the emissions regulated herein is installed and operated simultaneously at the facility where the generator is installed and operated, then the electricity savings supplied by the non-emitting electricity source shall be added to the electricity supplied by the generator for the purposes of calculating compliance with the requirements of this regulation, subject to the approval of the Department and in accordance with the following formula for determining such savings: Click here to view Image
where
RateEF = effective emission rate of generator, accounting for non-emitting
resource or sources (lb/MWh);
RateA = actual emission rate of generator alone (lb/MWh);
SizeA = actual prime power rating of generator (MW);
SizeNER = total generating capacity of non-emitting resource or sources (MW).
01/11/2006
7 Del. Admin. Code § 1144-8.0