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Linkageless Burner Retrofits for Steam Boilers

Going Beyond Carburetor Technology in the NYS Market

Fun Fact #1: Space heating and domestic hot water generation represent two of the greatest energy end uses in New York State.

Fun Fact #2: More than 70 percent of all New York City buildings utilize steam for space heating.

Background

The clear majority of the distribution systems in these NYC buildings are supplied by high mass steam boiler plants. Digging down a bit further, it is important to note that the most common air:fuel control for these boilers is a mechanical linkage that connects a single servo motor to both the combustion air damper and the fuel control valve(s). We know that adjusting one part of the linkage’s movement affects fuel and air rates elsewhere in the range, making accurate adjustment difficult. We also know that modern linkageless controls use separate servo motors to operate the fuel control valves, combustion air damper, and (in some cases) the flue damper, allowing for finer control.

mechanical linkage system and linkageless system

In fact, SWA recently completed a demonstration study (partially funded through NYSERDA’s Advanced Building Program) to evaluate linkageless burner retrofits on two buildings with respect to energy savings and carbon reductions, as well as qualitative or non-energy benefits. The retrofit materials were funded by Preferred Utilities Manufacturing Corp. of Danbury, CT, who also provided manufacturer’s technical support. The study also focused on quantifying the seasonal efficiency of intermediate-sized, high mass steam boiler plants, which had not previously been studied. The demonstration addresses this gap in the industry’s knowledge.

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New York Keeps It Clean with a Global Commitment to Emissions Reduction

This October, Governor Cuomo announced with former Vice President Gore that New York will join the Under 2 MOU effort to join states and cities around the world in pledging to reduce GHG emissions 80% by 2050. The Under 2 MOU is a global joint effort to encourage action at the Conference of the Parties meeting at the 21st UN Conference on Climate Change in Paris later this year.

This is not the first commitment that impacts performance targets for buildings in New York. Both the city and state have committed to deep reductions in emissions that have regulatory and programmatic impacts on buildings.

What Targets are in Place?

The Under 2 MOU program is already in line with New York’s same self imposed target in place: 80 by 50 via Executive Order No. 24 which was signed in 2009. New York is one of 20 states, plus DC, with a target in place.

SWA_PolicyEmissionsMap

Source: http://www.c2es.org/us-states-regions/policy-maps/emissions-targets

New York City has a comparable target.  In September 2014 the One City Built to Last plan also targeted an 80% reduction by 2050. But to reach this target, the city needs to reduce 30% of GHG from the building stock by 2025.

How Does New York Reach These Goals?
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