Optimization of Building Cooling Heating and Power

Open Access
Lin, Bo
Graduate Program:
Architectural Engineering
Master of Science
Document Type:
Master Thesis
Date of Defense:
March 15, 2012
Committee Members:
  • James Freihaut, Thesis Advisor
  • William P Bahnfleth, Thesis Advisor
  • Stephen James Treado, Thesis Advisor
  • BCHP
  • Optimization
  • Residential Building
In 2008, buildings consumed 40% of primary energy in US; and residential buildings consumed 22% of this primary energy consumption. Building cooling heating and power (BCHP) is considered a promising and affordable technology to reduce primary energy consumption, fuel costs and greenhouse gases emissions. The BCHP system simultaneously produces electricity and heat to achieve the high system fuel utilization efficiency. The wider implementation of BCHP system can further increase the reliability of the grid power system, fuel diversity and national security. In this research, a comprehensive factor evaluation method of BCHP system implementation potential is presented. From the analysis, the top seven states are identified as most suitable to utilize technology. The realization of BCHP benefits depends on the system selection, integration and operation. The research further examined the effect of different types and number of primer movers, absorption cooling, vapor compression cooling, operational strategies on the performance of system, and, consequently, CHP system adoption. The IC engine and microturbine are the two major groups of prime mover systems. 32 different system combinations are calculated and compared for annual primary energy consumption, fuel cost; greenhouses gas emissions, system fuel utilization efficiency and overall building energy efficiency. From the results, the overall best performance scenario is selected and further optimized. In the operational strategy optimization, linear programming is the algorithm. In this optimization, objective functions and constraints are developed and defined. The research results show that the implementation of an appropriate BCHP system can effectively reduce primary energy consumption, fuel cost and emission in residential buildings. A CHP related data base and an innovative evaluation method have been formed in the research. The parametric comparison between different system combinations can facilitate the design in the early phase with affordable time calculation. The operational strategy optimization demonstrates a manner to realize the maximum theoretical benefits of BCHP system.