22 May 2008

OPTIMIZATION OF HEAT PUMP APPLICATIONS FOR NET-ZERO EXERGY BUILDINGS


Steering a change for global sustainability requires a new, rationale driven
approach that provides guidance to reduce emissions and protect the environment. The
Rational Exergy Management Model (REMM) provides the approach of balancing natural
energy resources based on their useful work potential, or exergy. For the first time, REMM
formulates the level of match in the supply and demand of exergy to broader impacts on CO2
emissions, which becomes very important to reduce global warming. Furthermore, its new
parameter effectively shows the ways to reduce CO2 emissions that have been compounded.
The application of REMM to the building sector, the largest contributor of CO2 emissions,
presents examples to think beyond the present characteristics of buildings. It also shows that
heat pumps must be optimized with exergy matches in combined heat and power systems to
reduce compound CO2 emissions. It is expected that this approach will be put into practice to
achieve carbon wedges from buildings and set a vision for net-zero exergy buildings. An
analysis tool is also developed to support the educational purposes of the REMM model.