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Thermal Energy Efficiency Opportunities & Incentives
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Steam & Energy Management Systems
Overview Steam Systems & Energy Management Systems
Thermal (Natural Gas) Energy Efficiency Opportunities National Grid Incentives Overview Energy Efficiency Measure Examples 2
Steam Systems •Typical System
Exhaust Gas
Exhaust Gas Space & DHW
Inducer Fan
Heating
Blowdown
Steam Steam
Combustion Air
Vent
Vent
Inlet Fan
Blowdown
USDOE – Industrial Technologies Program – Improving Steam System Performance
3
Steam Systems System Incorrectly Operating vs. System Correctly Operating Correct or Submit “As Is”?
Opportunity vs. Incentive Eligible EEM Boiler Door Gaskets, Pipe Leaks, etc.
4
Steam Systems •Natural Gas Savings Opportunities
Exhaust Gas
Exhaust Gas Space & DHW
Inducer Fan
Heating
Blowdown
Steam Steam
Combustion Air
Vent
Vent
Inlet Fan
Blowdown
USDOE – Industrial Technologies Program – Improving Steam System Performance
5
Steam Systems •Natural Gas Savings Opportunities Generation High-Efficiency Boiler Shell Insulation Pre-Heat Combustion Air Pre-Heat Feedwater Decrease Pressure Automate Blowdown Blowdown Heat Recovery Excess O2 Trim 6
Steam Systems •Natural Gas Savings Opportunities Distribution Steam Pipe Insulation Turbine vs. PRVs Control & Isolation Valve Insulation Steam Traps
7
Steam Systems •Natural Gas Savings Opportunities End-Use Heat Exchanger Insulation Steam Traps Steam Pipe Insulation Process Equipment (i.e., steam vats) Pre-Heat Incoming Water/Fluid
8
Steam Systems •Natural Gas Savings Opportunities Recovery High-Pressure Condensate Flash Steam Re-Use Condensate Pipe Insulation Vent Steam Reduction & Heat Recovery Steam Traps Condensate & Deaerator Tanks Insulation
9
Steam Systems •Natural Gas Incentives Generation
Distribution
End-Use
Recovery
High-Efficiency Boiler
Steam Pipe Insulation
Heat Exchanger Insulation
Shell Insulation
Turbine vs. PRV
Steam Traps
Pre-Heat Combustion Air
Control & Isolation Valve Insulation
Steam Pipe Insulation
Pre-Heat Feedwater
Steam Traps
Process Equipment (i.e., steam vats)
Vent Steam Reduction & Heat Recovery
Pre-Heat Incoming Water/Fluid
Steam Traps
Decrease Pressure Automate Blowdown Blowdown Heat Recovery Excess O2 Trim
High-Pressure Condensate Flash Steam Re-Use Condensate Pipe Insulation
Condensate & Deaerator Tanks Insulation
•Custom or Prescriptive •Custom 10
Steam Systems •Natural Gas Incentives Overview - Custom Eligibility Pre-Requisites in both MA & RI…
Notable Differences between MA’s & RI’s NG Programs…
-SPB < Equip. Lifetime - BCR > 1.0
- Program Names - ≥ 300 kW -$1.50/Therm vs. $3.00/Therm - Dual-Fuel EEM Incentive
New Construction
Retrofit Incentive Eligibility ROT ~80% Lifetime > EEM’s SPB > 1.0 Y
11
Steam Systems •Natural Gas Incentives Overview - Prescriptive
New Traps New Traps & & Repair Kits Repair Kits
12
Steam Systems •Steam & Condensate Pipe Insulation Pipe Insulation Summary Capital Cost Annual Savings Payback (Years) Incentive Up to 50% of Capital Cost Up to $1.50/Therm (MA) Up to $3.00/Therm (RI) Down to 1.0 Years SPB Savings Unit Loss (Btu/H-Ft) Hours/Year K Lbs./Year (500 Ft.) Therms/Year (500 Ft.) Dollars/Year
Heating $15,000 $6,728 2.2 Heating $7,500 $13,456 $26,913 $8,272 Heating 396 3,500 714 8,971 $6,728
Process $15,000 $35,924 0.4 Process N/A N/A N/A N/A Process 881 8,400 3,815 47,899 $35,924
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Steam Systems •Steam Pressure Reduction Steam Pressure Reduction Summary Capital Cost Annual Savings Payback (Years) Incentive Up to 50% of Capital Cost Up to $1.50/Therm (MA) Up to $3.00/Therm (RI) Down to 1.0 Years SPB Savings Unit Loss (Btu/H-HP) Hours/Year K Lbs./Year Therms/Year Dollars/Year
Heating N/A N/A N/A Heating N/A N/A N/A N/A Heating N/A N/A N/A N/A N/A
Process $20,000 $4,224 4.7 Process $10,000 $8,449 $16,898 $15,776 Process 518 8,400 449 5,633 $4,224
100 HP 125 psig → 100 psig
16
Steam Systems •Pre-Heat Boiler Feedwater
Pre-Heat Boiler Feedwater
200 HP 100% Firing Rate ~14 gpm 225 oF → 250 oF ~166,000 Btu/H
Summary Capital Cost Annual Savings Payback (Years) Incentive Up to 50% of Capital Cost Up to $1.50/Therm (MA) Up to $3.00/Therm (RI) Down to 1.0 Years SPB Savings Unit Heat Recovery (Btu/H) Hours/Year K Lbs./Year Therms/Year Dollars/Year
Heating N/A N/A N/A Heating N/A N/A N/A N/A Heating N/A N/A N/A N/A N/A
Process $25,000 $9,786 2.6 Process $12,500 $19,573 $39,146 $15,214 Process 120,000 8,400 1,039 13,049 $9,786
17
Steam Systems •Steam Traps Steam Traps Summary Capital Cost Annual Savings Payback (Years) Incentive Up to 50% of Capital Cost Up to $1.50/Therm (MA) Up to $3.00/Therm (RI) Down to 1.0 Years SPB Savings Unit Loss (Lbs./H) Hours/Year K Lbs./Year Therms/Year Dollars/Year
Steam Traps Heating $170 $112 1.5 Heating N/A N/A N/A N/A Heating 3.4 3,500 12 149 $112
Process $518 $1,495 0.3 Process N/A N/A N/A N/A Process 18.9 8,400 159 1,993 $1,495
Summary Capital Cost Annual Savings Payback (Years) Incentive Up to 50% of Capital Cost Up to $1.50/Therm (MA) Up to $3.00/Therm (RI) Down to 1.0 Years SPB Savings Unit Loss (Lbs./H) Hours/Year K Lbs./Year Therms/Year Dollars/Year
Heating $170 $112 1.5 Heating N/A N/A N/A N/A Heating 3.4 3,500 12 149 $112
Process $518 $1,495 0.3 Process N/A N/A N/A N/A Process 18.9 8,400 159 1,993 $1,495
Prescriptive MA - $25/Trap RI – Up to $75/Trap (RI – 100 Trap Max.)
Custom Survey - 100% by NGrid Repairs – 50% by Ngrid (RI – $10,000 Max./Y)
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Steam Systems
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EMSs •Natural Gas Savings Opportunities AHU, RTU, Boiler, Pump, etc. Start/Stop Schedules (Master, Zones, Equipment, etc.) Occupancy Optimal
Reset Hot Water Discharge Air Temperature
Setback Unoccupied Standby
Demand Control Ventilation Boiler Staging & Loading Warm Weather Shutdown/Lockout Prevent Simultaneous Heating & Cooling 20
Steam Systems •Natural Gas Incentives Overview - Custom Eligibility Pre-Requisites in both MA & RI…
Notable Differences between MA’s & RI’s NG Programs…
-SPB < Equip. Lifetime - BCR > 1.0
- Program Names - ≥ 300 kW -$1.50/Therm vs. $3.00/Therm - Dual-Fuel EEM Incentive
New Construction
Retrofit Incentive Eligibility ROT ~80% Lifetime > EEM’s SPB > 1.0 Y
21
EMSs •Natural Gas Incentives Overview - Prescriptive
600
$3,
0 $90
0 ,80 $10
700 $2,
0 ,80 8 2 $
200 $7,
22
EMSs •Demand Control Ventilation Energy Efficiency Measure Snapshot ○ ○ ○ ○ ○
Demand Control Ventilation Air Handling Units, Roof-Top Units & Make-Up Air Units, Unit Ventilators Reduces the amount of outside air to be conditioned. Tracks space occupancy through CO2 sensors and adjusts outside/return air dampers. Energy Savings - Percentage the AHU's outside airflow can be reduced. ~50%
» » » »
Dampers with fixed position dampers set for maximum space occupancy. Good - Space Heating or Cooling. » Best - Both Space Heating & Cooling. Minimum Supply Fan rating of ~5,000 cfm and centralized returns. Variable Hourly and/or Daily Occupancy.
Favorable System/Equipment Characteristics
Financial Summary Equipment Size: 1 x AHU (Supply Fan ~9,000 cfm) Capital Cost: $4,667 Monetary Savings: Incentive - Electric: $667 Simple Payback: Incentive - NG: $2,350 Simple Payback:
$1,650 2.8 1.0
Incentive Program & Eligibility Large Commercial Retrofit or Commercial New Construction Program Natural Gas Incentive - Custom Application Up to 75% of Incremental Cost or Up to $1.50/Therm-Y (MA)/$3.00/Therm (RI) or Down to 1.0 Y SPB. Up to 50% of Total Cost or Up to $1.50/Therm-Y (MA)/$3.00/Therm (RI) or Down to 1.0 Y SPB.
Electric Incentive - Custom Application Up to 75% of Incremental Cost or ~$.25/kWh-Y (RI) or Down to 1.0 Year Simple Payback. Up to 50% of Total or ~$.19/kWh-Y (RI) or Down to 1.0 Year Simple Payback.
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EMS Systems
25
Place your chosen image here. The four corners must just cover the arrow tips. For covers, the three pictures should be the same size and in a straight line.
Steam & Energy Management Systems
Overview Steam Systems & Energy Management Systems
Thermal (Natural Gas) Energy Efficiency Opportunities National Grid Incentives Overview Energy Efficiency Measure Examples 2
Steam Systems •Typical System
Exhaust Gas
Exhaust Gas Space & DHW
Inducer Fan
Heating
Blowdown
Steam Steam
Combustion Air
Vent
Vent
Inlet Fan
Blowdown
USDOE – Industrial Technologies Program – Improving Steam System Performance
3
Steam Systems System Incorrectly Operating vs. System Correctly Operating Correct or Submit “As Is”?
Opportunity vs. Incentive Eligible EEM Boiler Door Gaskets, Pipe Leaks, etc.
4
Steam Systems •Natural Gas Savings Opportunities
Exhaust Gas
Exhaust Gas Space & DHW
Inducer Fan
Heating
Blowdown
Steam Steam
Combustion Air
Vent
Vent
Inlet Fan
Blowdown
USDOE – Industrial Technologies Program – Improving Steam System Performance
5
Steam Systems •Natural Gas Savings Opportunities Generation High-Efficiency Boiler Shell Insulation Pre-Heat Combustion Air Pre-Heat Feedwater Decrease Pressure Automate Blowdown Blowdown Heat Recovery Excess O2 Trim 6
Steam Systems •Natural Gas Savings Opportunities Distribution Steam Pipe Insulation Turbine vs. PRVs Control & Isolation Valve Insulation Steam Traps
7
Steam Systems •Natural Gas Savings Opportunities End-Use Heat Exchanger Insulation Steam Traps Steam Pipe Insulation Process Equipment (i.e., steam vats) Pre-Heat Incoming Water/Fluid
8
Steam Systems •Natural Gas Savings Opportunities Recovery High-Pressure Condensate Flash Steam Re-Use Condensate Pipe Insulation Vent Steam Reduction & Heat Recovery Steam Traps Condensate & Deaerator Tanks Insulation
9
Steam Systems •Natural Gas Incentives Generation
Distribution
End-Use
Recovery
High-Efficiency Boiler
Steam Pipe Insulation
Heat Exchanger Insulation
Shell Insulation
Turbine vs. PRV
Steam Traps
Pre-Heat Combustion Air
Control & Isolation Valve Insulation
Steam Pipe Insulation
Pre-Heat Feedwater
Steam Traps
Process Equipment (i.e., steam vats)
Vent Steam Reduction & Heat Recovery
Pre-Heat Incoming Water/Fluid
Steam Traps
Decrease Pressure Automate Blowdown Blowdown Heat Recovery Excess O2 Trim
High-Pressure Condensate Flash Steam Re-Use Condensate Pipe Insulation
Condensate & Deaerator Tanks Insulation
•Custom or Prescriptive •Custom 10
Steam Systems •Natural Gas Incentives Overview - Custom Eligibility Pre-Requisites in both MA & RI…
Notable Differences between MA’s & RI’s NG Programs…
-SPB < Equip. Lifetime - BCR > 1.0
- Program Names - ≥ 300 kW -$1.50/Therm vs. $3.00/Therm - Dual-Fuel EEM Incentive
New Construction
Retrofit Incentive Eligibility ROT ~80% Lifetime > EEM’s SPB > 1.0 Y
11
Steam Systems •Natural Gas Incentives Overview - Prescriptive
New Traps New Traps & & Repair Kits Repair Kits
12
Steam Systems •Steam & Condensate Pipe Insulation Pipe Insulation Summary Capital Cost Annual Savings Payback (Years) Incentive Up to 50% of Capital Cost Up to $1.50/Therm (MA) Up to $3.00/Therm (RI) Down to 1.0 Years SPB Savings Unit Loss (Btu/H-Ft) Hours/Year K Lbs./Year (500 Ft.) Therms/Year (500 Ft.) Dollars/Year
Heating $15,000 $6,728 2.2 Heating $7,500 $13,456 $26,913 $8,272 Heating 396 3,500 714 8,971 $6,728
Process $15,000 $35,924 0.4 Process N/A N/A N/A N/A Process 881 8,400 3,815 47,899 $35,924
15
Steam Systems •Steam Pressure Reduction Steam Pressure Reduction Summary Capital Cost Annual Savings Payback (Years) Incentive Up to 50% of Capital Cost Up to $1.50/Therm (MA) Up to $3.00/Therm (RI) Down to 1.0 Years SPB Savings Unit Loss (Btu/H-HP) Hours/Year K Lbs./Year Therms/Year Dollars/Year
Heating N/A N/A N/A Heating N/A N/A N/A N/A Heating N/A N/A N/A N/A N/A
Process $20,000 $4,224 4.7 Process $10,000 $8,449 $16,898 $15,776 Process 518 8,400 449 5,633 $4,224
100 HP 125 psig → 100 psig
16
Steam Systems •Pre-Heat Boiler Feedwater
Pre-Heat Boiler Feedwater
200 HP 100% Firing Rate ~14 gpm 225 oF → 250 oF ~166,000 Btu/H
Summary Capital Cost Annual Savings Payback (Years) Incentive Up to 50% of Capital Cost Up to $1.50/Therm (MA) Up to $3.00/Therm (RI) Down to 1.0 Years SPB Savings Unit Heat Recovery (Btu/H) Hours/Year K Lbs./Year Therms/Year Dollars/Year
Heating N/A N/A N/A Heating N/A N/A N/A N/A Heating N/A N/A N/A N/A N/A
Process $25,000 $9,786 2.6 Process $12,500 $19,573 $39,146 $15,214 Process 120,000 8,400 1,039 13,049 $9,786
17
Steam Systems •Steam Traps Steam Traps Summary Capital Cost Annual Savings Payback (Years) Incentive Up to 50% of Capital Cost Up to $1.50/Therm (MA) Up to $3.00/Therm (RI) Down to 1.0 Years SPB Savings Unit Loss (Lbs./H) Hours/Year K Lbs./Year Therms/Year Dollars/Year
Steam Traps Heating $170 $112 1.5 Heating N/A N/A N/A N/A Heating 3.4 3,500 12 149 $112
Process $518 $1,495 0.3 Process N/A N/A N/A N/A Process 18.9 8,400 159 1,993 $1,495
Summary Capital Cost Annual Savings Payback (Years) Incentive Up to 50% of Capital Cost Up to $1.50/Therm (MA) Up to $3.00/Therm (RI) Down to 1.0 Years SPB Savings Unit Loss (Lbs./H) Hours/Year K Lbs./Year Therms/Year Dollars/Year
Heating $170 $112 1.5 Heating N/A N/A N/A N/A Heating 3.4 3,500 12 149 $112
Process $518 $1,495 0.3 Process N/A N/A N/A N/A Process 18.9 8,400 159 1,993 $1,495
Prescriptive MA - $25/Trap RI – Up to $75/Trap (RI – 100 Trap Max.)
Custom Survey - 100% by NGrid Repairs – 50% by Ngrid (RI – $10,000 Max./Y)
18
Steam Systems
19
EMSs •Natural Gas Savings Opportunities AHU, RTU, Boiler, Pump, etc. Start/Stop Schedules (Master, Zones, Equipment, etc.) Occupancy Optimal
Reset Hot Water Discharge Air Temperature
Setback Unoccupied Standby
Demand Control Ventilation Boiler Staging & Loading Warm Weather Shutdown/Lockout Prevent Simultaneous Heating & Cooling 20
Steam Systems •Natural Gas Incentives Overview - Custom Eligibility Pre-Requisites in both MA & RI…
Notable Differences between MA’s & RI’s NG Programs…
-SPB < Equip. Lifetime - BCR > 1.0
- Program Names - ≥ 300 kW -$1.50/Therm vs. $3.00/Therm - Dual-Fuel EEM Incentive
New Construction
Retrofit Incentive Eligibility ROT ~80% Lifetime > EEM’s SPB > 1.0 Y
21
EMSs •Natural Gas Incentives Overview - Prescriptive
600
$3,
0 $90
0 ,80 $10
700 $2,
0 ,80 8 2 $
200 $7,
22
EMSs •Demand Control Ventilation Energy Efficiency Measure Snapshot ○ ○ ○ ○ ○
Demand Control Ventilation Air Handling Units, Roof-Top Units & Make-Up Air Units, Unit Ventilators Reduces the amount of outside air to be conditioned. Tracks space occupancy through CO2 sensors and adjusts outside/return air dampers. Energy Savings - Percentage the AHU's outside airflow can be reduced. ~50%
» » » »
Dampers with fixed position dampers set for maximum space occupancy. Good - Space Heating or Cooling. » Best - Both Space Heating & Cooling. Minimum Supply Fan rating of ~5,000 cfm and centralized returns. Variable Hourly and/or Daily Occupancy.
Favorable System/Equipment Characteristics
Financial Summary Equipment Size: 1 x AHU (Supply Fan ~9,000 cfm) Capital Cost: $4,667 Monetary Savings: Incentive - Electric: $667 Simple Payback: Incentive - NG: $2,350 Simple Payback:
$1,650 2.8 1.0
Incentive Program & Eligibility Large Commercial Retrofit or Commercial New Construction Program Natural Gas Incentive - Custom Application Up to 75% of Incremental Cost or Up to $1.50/Therm-Y (MA)/$3.00/Therm (RI) or Down to 1.0 Y SPB. Up to 50% of Total Cost or Up to $1.50/Therm-Y (MA)/$3.00/Therm (RI) or Down to 1.0 Y SPB.
Electric Incentive - Custom Application Up to 75% of Incremental Cost or ~$.25/kWh-Y (RI) or Down to 1.0 Year Simple Payback. Up to 50% of Total or ~$.19/kWh-Y (RI) or Down to 1.0 Year Simple Payback.
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EMS Systems
25
