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Energy + Get AlertsCombined heat and power system saves energy
Problem
The aging internal combustion engines at the 26 mgd York (Pa.) Wastewater Treatment Plant raised monthly energy expenditures to $63,000.
Solution
Operators selected a C1000 and C600 microturbine combined heat and power system from Capstone that operates on natural gas and on biogas produced at the plant.
Compared with the original engines, the side-by-side units produced 40 percent more power using the same amount of natural gas while reducing electricity bills. The plant further reduced operating costs by recovering the microturbine exhaust heat and using it in the digestion process. 818/734-5300; www.capstoneturbine.com.
Facility captures and refines biogas
Problem
To relieve the strain high energy costs were putting on the city’s budget, Dallas (Texas) Water Utilities looked to reduce its electrical consumption by using biogas from the anaerobic digesters.
Solution
Officials worked with Ameresco to design, build and operate a 4.3 MW combined heat and power facility processing 1,200 scfm of biogas.
The facility was projected to save the city $1.5 million annually and offset most of the electricity the utility has typically drawn from the grid. 866/263-7372; www.ameresco.com.
