本論文的研究目的為探討建築物室內環境運用自然浮力通風時之整體通
風的變化, 使用壓克力模型裝設內部隔板形成兩串連房間, 搭配不同的開
口位置及不同的開口有效面積進行實驗。建築物模型使用內部隔板將其
區分為兩個相同大小之空間, 提供熱源之空間稱為浮力源房間, 另一空間
則稱為無浮力源房間, 理論分析依據無浮力源房間的驅動力可將兩串連房
間分為拉式與推式兩種置換式通風。實驗方法使用鹽水與清水模擬密度
差異時的浮力, 建築物模型頂部裝設一鹽水噴嘴, 鹽水捲流進行的方向跟
重力相同, 但是與熱升流進行的方向相反, 本論文除了第二章基本分析理
論外, 都是根據實驗的方位敘述。實驗結果顯示拉式置換式通風改變無浮
力源房間開口位置時, 對浮力源房間之交界面高度無明顯的影響, 相同條
件對推式置換式通風則是兩房間之交界面高度皆會改變。對於兩種型式
的置換式通風, 開口有效面積越大, 交界面至原點的距離越長; 當浮力源
房間與中間隔板開口面積固定相等時(Af=Ai), 無浮力源房間與中間隔
板之開口面積比越大時室內的換氣流量越大。在相同的面積比下,拉式置
換式通風之流量大於推式置換式通風。

The purpose of this research is to study ventilation patterns in two
series-connected chambers. The experiment uses utilizing acrylic
model with an interior divider to analyze different position and vari-
ous total effective area of openings. By an interior divider, the space
is divided into two same size rooms. The space has a heat source
denoted as "forced-room", and the other is denoted as "unforced
room". The study discusses that different types of ventilation in an
indoor space which has various arrangements of ventilation openings.
Salt water and flesh water are used to simulate the buoyancy force
difference in experiments. A salt water source nozzle is placed at the
top of the acrylic tank. Salt plume proceeds in the same direction
as the gravity, but it is opposite to the thermal plume proceeding
direction. Except for discussion in Chapter 2,the thesis presents
and discusses the results according to the experimental orientation.
Experimental results show that different opening arrangement in the
unforced chamber for the pull-type displacement ventilation does not
change the interface level in the forced chamber, but under the same
condition the interface levels are varied in two chambers respectively
for the push-type displacement ventilation. For those two types of
displacement ventilation, the larger effective opening area results in
the larger exchange flowrate. Under the circumstance of fixed open-
ing areas of the forced chamber and interior divider, increasing the
ratio of the unforced chamber opening area to the interior divider
opening area can induce higher ventilation flowrate. At the same
area ratio of the unforced chamber to the interior divider, the pull-
type has higher ventilation flowrate than the push-type.

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