Planning and Design of Low-Power-Consuming Full-Outer-Air-Intake Natural Air-Conditioning System

Table 2

Comparison table of the building energy conversion system and traditional total heat exchanger system.

Item	This subjected system	Total heat exchanger
		Rotary wheel	Polymer fixed plate
Energy conversion method	Air and water	Air	Air
Fan power	Variable air volume	Constant air volume	Constant air volume
Equipment power	Fan and pump	Wheel motor and fan	Fan
Separation of intake/exhaust air	Entirely separated	Mixed up	Separated by highly permeable fibers
Air cross-contamination	No	Yes	Yes
Positive/negative environment	Yes	No	No
Sensible energy conversion efficiency	71%∼112%	65%∼78%	65%∼78%
EER	24.87∼13.69 kcal/W·h	N/A	5.43∼0.07 kcal/W·h

N/A: unable to measure EER because the wheel-type total heat exchanger does not provide a similar model.