Page 372 - Sustainable On-Site CHP Systems Design, Construction, and Operations

CHAPTER 21

Case Study 3:

Optimal Sizing Using

Computer Simulations—

New School

Itzhak Maor

T. Agami Reddy

his case study is meant to illustrate the sizing of the prime mover and the absorp-
tion chiller using a detailed simulation program. A school campus located close
Tto New York City has been selected to illustrate the application of its principles
and methodology as outlined in Chap. 8 by means of a representative CHP “schematic
phase” simulation and LLC evaluation (see Chap. 9).
With it, the project engineer or developer can evaluate the most likely outcome of
one or more CHP alternatives before having to commit additional resources needed for
subsequent detailed design and construction phases, after gaining reasonable assur-
ance that the CHP plant configuration selected should be a cost-effective investment.
The sizing of the prime mover and the absorption chiller is based on the CHP opti-
mizer program by Hudson for which hourly heating, cooling, and nonchiller electric
1
loads are required along with certain performance and cost data.
2
A DOE 2.1 E building energy simulation model was developed for a large 229,700-ft -
high school facility designed to accommodate around 1500 students. New York corre-
sponds to area 5A in the geographical locations established by ANSI/ASHRAE/IESNA
2
Standard 90.1-2007, normative appendix B (based on Briggs et al.). As shown in Fig. 21-1,
the facility is a campus comprises the following areas:
1. Two three-story classroom wings
2. One two-story special classroom wing which includes library and special areas
such as educational labs and computer classrooms

345