Abstract
Faced with the growing resource shortage and continuing environmental deterioration, air-conditioning and heating (A/C&H) intermittent operation has received much attention as an energy-efficient technology. This study serves as a review of A/C&H system improvement and envelope optimization under A/C&H intermittent operation. The additional load, operational strategies and terminal unit optimization are comparatively investigated under the intermittent operation. The transient load under the A/C&H intermittent operation must be larger than that under A/C&H continuous operation, but there is the shorter operation time under the A/C&H intermittent operation, and combined with a suitable operation strategy, the energy-saving efficiency is obviously improved. And the A/C&H system with smaller thermal inertia is able to raise the indoor temperature rapidly and thereby has larger energy saving potential. The traditional thermal insulation improvement based on A/C&H continuous operation cannot realize the building energy efficiency and even has a negative effect under the A/C&H intermittent operation. Under the A/C&H intermittent operation, the interior walls and floors should be appreciated and formed the much higher A/C&H load. Finally, some potential directions are proposed to explore the application of A/C&H intermittent operation.
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