23 September 2011

ENERGY MANAGEMENT IN HEATPUMP-BASED HVAC SYSTEM RENOVATION PROJECT


This paper describes that what effects could be gained by applying an energy
simulation tool consistently to each phase of an air-conditioning equipment renewal project
for an office building with heat pumps served as heat sources. As for the simulation tools,
Life Cycle Energy Management (LCEM) tool that can evaluate energy throughout the life
cycle of a building was used for application to phases from designing to test running.
In the design phase, the optimum air-conditioning system including heat pumps was
selected, energy-saving effects were evaluated, and management targets were set. In the
next phase of execution of work, it was confirmed that the air-conditioning system could clear
the targets that were set in the design phase. Then, in the trial operation and adjustment
phase, the difference between the results of simulation and actual operation was checked,
and it was confirmed that actual operating characteristics could be reproduced by correction,
and the management targets were adjusted in consideration of the characteristics of the real
system. These were made possible by applying a single tool throughout the project.
The results of examination showed that the consistent application of the energy simulation
tool to phases from designing to trial operating contributed to optimized design of airconditioning
system, optimized selection of equipment including heat pumps, and further to
the optimum operation of the air-conditioning system as a whole.