Con Ed Steam

Consolidated Edison of New York (Con Ed) operates the largest district heating system ever built (apart from those in centrally-planned economies, i.e. the former communist states). The system has operated continously since March 1882 and serves Manhattan Island from the Battery through 96th Street. In addition to providing space and water heating, steam from the system is used in numerous restaurants for food preparation as well as to power absorption and steam-turbine chillers for air conditioning.

A detailed history and description of this system will be added here in the near future.

For more information about Con Ed, visit www.coned.com.

System Statistics

Steam System                                       1994       1993
    Winter peak sendout (million pounds per hour)  12.2       11.5
						    3.5 GW     3.3 GW
	
    Net station capacity (million pounds per hour)  13.8       13.6
						     3.9 GW	3.8 GW

    Length of mains and services                    104 mi        103 mi
                                                    167 km	  166 km

    Customers					  1,964

Steam Sales (thousands of pounds)                 1994                  1993
    General                                     815,002               851,913
    Annual power                             21,364,297            20,269,857
    Apartment house                           8,505,856             8,272,565
  Total                                      30,685,155            29,394,335
						     32.4 PJ		  31.0 PJ
						      8.7 TWh		   8.6 TWh

Revenues
   Electric                              $5,140,472,000        $5,131,665,000
   Gas                                     $890,107,000          $808,389,000
   Steam                                   $342,507,000          $325,340,000
 Total revenues                          $6,373,086,000        $6,265,394,000

Load Factor [production/(station capacity x 8760)]  25.4%      		 24.7%
Demand hours (production/peak sendout)              2,515	         2,556

Specific Heat Supply (Total heat generation/total pipeline length)
					 295 049 Btu/mi		285 382 Btu/mi
					      53.7 MWh/m	     53.7 MWH/m

Average Heat Unit Cost			     $11.16/Mlb		$11.07/Mlb
				(approx)     $11.16/mmBtu	$11.16/mmBtu