1 Combined Heat and Power (CHP): Cogeneration for housing and other buildings HUD “GOING GREEN Conference: Intelligent Investments for Public Housing” Boston, July Bob Groberg, Co-Chair HUD Energy Task Force (Retired) John daSilva, Sales Manager, Aegis Energy Services

2 A way to produce electricity in your own building A way to use heat usually wasted when electricity is generated. What is combined heat and power (CHP)” or “cogeneration”?

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4 CHP Equipment for Multifamily Buildings Reciprocating Engines, Microturbines

CHP FOR SMALLER BUILDINGS EPA has an “Emerging Technology” Initiative 2011 ENERGY STAR Award recognized two “micro CHP” systems: ECR International “freewatt” MCHP System Marathon “ecopower MCHP System 5

6 Why Consider CHP? Lower operating cost: reduced electricity and/or fuel bills Avoid some cost of electric service Offset cost of HVAC system upgrades Increase reliability/avoid power outages Reduce emissions – satisfy new restrictions, generate salable credits Public relations – enhance “green” image

7 Housing Finance Agencies Can Support CHP Massachusetts HFA: Financed adding CHP to many older developments Reduced energy costs maintain affordability Used reserves, refinancing, rebates, typical three-year payback for some Supports CHP for new construction Stresses the importance of the company installing and maintaining the system. In Mass. utilities provide financial support.

8 CHP in Cambridge MA- 808 Memorial 300 units built in 1975 Put 75 kW cogen system in boiler room in 2004 Provides 42% electricity, 33% heating and DHW $175,000 MassHousing loan Payback est. 3.4 years

9 HUD’S CHP INITIATIVE HUD Energy Task Force Action Plan: Encouraged CHP for public and assisted multifamily housing Worked with EPA/DOE CHP Partnership and Oak Ridge National Laboratory DOE Regional Clean Energy Centers provided information and technical assistance

HUD Guides for CHP in Multifamily Buildings #1 Q & A on Combined Heat and Power for Multifamily Housing #2 Level 1 Feasibility Screening for Combined Heat and Power for Multifamily Housing #3 Introduction to Level 2 Analysis Tool for Multifamily Buildings 10

11 Combined Heat and Power in Danbury - CT, Wooster Manor 100 units PH built 1970’s 60kW system installed 1998 Provides 66% electricity, 50% space and all domestic hot water. Energy cost reduced by $40,000 annually $275,000 gas company loan

12 First steps... For a quick preliminary view of potential: EPA has 11 Questions for you to consider. Then for a simple calculation of the payback potential for a building try HUD’s CHP Feasibility Screening Software, prepared by Oak Ridge National Lab. For sources of technical assistance, contact DOE Regional Clean Energy Application Centers (RACs) or EPA’s CHP Partnership.

13 Is My Facility a Good Candidate for CHP?

14 Data needed for preliminary CHP Feasibility Screening Utility consumption (energy and demand) Utility rates Building area for heating and cooling Number of occupants Intermediate information

15 Monthly Utility Data

16 Utility Rate Data

17 Intermediate Information

18 Summary of Results

19 CHP Feasibility Guide “Results” Screens-Comparison of Methods

20 Results: Method 2- Hot Water, Space Heating and Cooling

21 Energy Plots

22 What “Results” Mean. Indicates whether a more detailed analysis would be worthwhile doing Encouraging results are a prelude to a more rigorous analysis by engineering professionals

23 CHP in HUD Programs Mark-to-Market Green Public Housing HOME Investment Partnership Program Multifamily Housing Management

24 Sources of Information about combined heat and power HUD CHP information- CHP Guides and links to ORNL software: index.cfm DOE CHP Initiative: distributedenergy/chp_basics.html EPA CHP Partnership: US Clean Heat and Power Association: