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Energy Savings from Large Scale CHP


Energy Savings from Large Scale CHP CHP saves energy by using the rejected heat from power production for heating, which is a significant component of building energy use, comprising 46% of the site energy used by buildings in the US.  A number of American district steam systems obtain part of their heat supply from CHP, but high steam pressures limit cogenerated power.  A prior paper, presented at the World Energy Engineering Congress, described a new public domain technology, for recycling reject heat from power plants that increases the amount of cogenerated power and simplifies piping. This paper describes techniques of mining publicly available data to estimate the potential savings from using this heat.  In the base case, energy savings of about 0.32 million barrels of oil per day and CO2 savings of about 38 million tons per year were obtained.

Results for New England, a pipeline-constrained area, are natural gas savings of 14% of the pipeline capacity, and CO2 savings of 7.6 million tons
of CO2 per year.   In the 9 states under the Regional Greenhouse Gas
Initiative, CO2 savings were 17.8% of the current cap.  The results of varying various parameters are also given.

Presented By

Robert Timmerman, P.E., C.E.M., LEED AP
R W Timmermam & Associates

Mr. Robert Timmerman holds Bachelor’s and Master’s degrees in Mechanical Engineering from Cornell University, is a Registered Professional Engineer in Pennsylvania by examination, and is Registered in Massachusetts and New Jersey.  He is a Certified Energy Manager, and has done independent research in energy conservation, district heating and cooling, and combined heat and power.  He holds several patents on district heating and combined heat and power technology.

Mr. Timmerman’s projects include:

  • Design of a heating system for an office building using the waste heat from a commercial power plant, which turned the generation only plant into a combined heat and power plant without modifying the power plant.
  • Engineering design of a seasonal solar storage project
  • Conceptual design of upgrades to the HVAC system of an existing 330,000 square foot office building to save 8% of the energy use at a cost of $5 per square foot.
  • Study of district cooling using ice frozen in winter to provide summer cooling
  • Energy Audits for 6,000,000 square feet of buildings.
  • Studies of ground source heat pumps, including hybrid solar/ground source heat pumps
  • Study of district heating/combined heat and power for Atlantic City, N.J.
  • Field measurement of fan power for 100 MW waste to energy plant.
  • Study of district heating project for Dunkirk, N.Y. using the waste heat from the 600 MW Dunkirk power plant, converting the power plant to a combined heat and power plant with no modifications to the power plant
  • Upgrades to combined cycle and conventional power plants.