PSDH210-2SS4 1SFA885308-BSL 驱动控制器 ABB
这些装置通常位于较冷地区，其中：
冬季低温的风险更大。从外部空气入口开始，空气进入外部空气管道
并由预热线圈加热。然后，空气与过滤器前空间的返回空气混合
（B） 。该混合空气被吸入一组过滤器，其中杂质被去除。当空气移动时，它经过
在一组冷却盘管（C）上，此处空气被冷却，根据通过空气的露点，可以
被除湿。然后，空气经过一组加热线圈（D），在那里被加热到所需温度，如果：
必需的在加热盘管之后，空气将通过一组加湿管（E）。如果相对湿度
如果通过的空气温度过低，这些管道将在空气通过时增加水分。加湿后，空气
通过送风机（F）拉动，送风机将推动送风机穿过送风管道、扩散器并进入
空间。然后，回风机（G）从空间吸入空气，并推动空气通过回风管道系统。空气
被排出或返回装置与外部空气混合并重新开始循环。
IPI在环境中实施可持续节能战略的方法（2017年）
制冷剂/冷却剂循环：
冷却盘管来自冷却源，如冷却器、冷却塔或DX装置。制冷剂
进入冷却盘管，从通过的空气中吸收热量，并返回其来源，以解吸热量
在里面
加热线圈由热源（例如锅炉或电力）供给。来自这些线圈的热量被传递
对经过它的空气。
系统变化：
1.系统可以具有多组过滤器以去除不同水平的杂质。
2.预热位置可以直接位于外部空气入口或混合空气室之后。
3.主加热盘管可能位于管道系统中较远的线路下方，称为再热。重新加热
盘管将在空气从管道排出之前加热特定空间的空气。
4.系统可以利用旁路设置，其中如果不需要，空气可以转向通过盘管
治疗。
5.加湿管可能不在每个单元中，也可能在之前在管道系统中更远的位置
扩散器。
6.如果送风机产生足够的吸力来抽吸空气，则每个机组上可能不存在回风机
穿过太空。
双管道空气处理装置
组件/布局：
过滤器
送风机
冷却盘管
加热线圈
加湿净化器
混合箱
扩散器
室外空气
回风机
IPI在环境中实施可持续节能战略的方法（2017年）
13
空气流量：
从上图中的点A开始，返回空气通过系统上的过滤器，并被吸入
送风机。然后，空气被推入装置的双管道部分。它现在将分成两个管道，一个
一个将处理加热功能，另一个处理冷却功能：
路线一/冷却-空气进入冷却管道（C）。这里空气与外界空气混合。现在的空气
成为返回空气和外部空气的混合状态，并通过冷却盘管。在这里，空气被冷却
并且，取决于通过空气的露点，可以被除湿。经过冷却盘管后
空气将通过管道系统，并在混合箱（F）中与加热空气混合。
路线二/加热-空气进入加热管道（D）。在这里，空气将通过一组加热线圈
加热通过的空气。接下来，它经过加湿器。如果通过空气的相对湿度过低
加湿器将向空气中添加水分，并将继续通过管道系统向混合箱（F）移动。
混合箱–混合箱是管道系统中加热和冷却管道的位置
结合这里，加热的空气与冷却的空气混合以实现空间的期望温度。这个
空气的混合由一个传感器控制，该传感器调节进入的加热或冷却空气的风门，打开或
以确保正确的空气混合用于产生所需的供应温度。
混合箱之后，混合空气继续沿管道系统向下流动。空气通过扩散器（G），并且
进入空间。终，空气被抽回回流管道系统，并被推动通过回流风扇（I）。
从这里，它将被耗尽或返回到系统的开始以再次开始该过程。
制冷剂/供暖供应
PSDH210-2SS4 1SFA885308-BSL 驱动控制器 ABB
PSDH210-2SS4 1SFA885308-BSL 驱动控制器 ABB
These units are typically found in colder regions where
there is greater risk of low winter temperatures. Starting at the outside air intake, air enters the outside air duct
and is heated by the pre-heat coil. The air is then mixed with return air from the space just before the filters
(B). This mixed air is pulled through a set of filters where impurities are removed. As the air moves it passes
over a set of cooling coils (C), here the air is cooled and depending on the dew point of the passing air, may be
dehumidified. The air then passes over a set of heating coils (D) where it is heated to the required temperature if
necessary. Following the heating coil the air will pass over a set of humidification tubes (E). If the relative humidity
of the passing air is too low these tubes will add moisture to the air as it passes. After humidification, the air is
pulled through the supply fan (F), which will push it through the supply ductwork, through the diffusers and into
the space. The return fan (G) then pulls in air from the space and pushes it through the return ductwork. The air
is either exhausted or returned to the unit to be mixed with outside air and start the cycle all over again.
IPI’s Methodology for Implementing Sustainable Energy-Saving Strategies in Collections Environments (2017)
Refrigerant/Coolant Cycle:
The cooling coils are fed from a source of cooling, such as chillers, a cooling tower, or DX unit. The refrigerant
enters the cooling coils, absorbs heat from the passing air, and returns to its source to desorb the heat that it took
in.
The heating coils are fed from a heat source such as a boiler or electricity. The heat from these coils is transferred
to the air passing over it.
System Variations:
1. A system may have multiple sets of filters to remove different levels of impurities.
2. The preheat location may be directly at the outside air intake or after the mixed air chamber.
3. The main heating coil may be farther down the line in the ductwork in what is called a reheat. As a reheat
the coil will heat air for a specific space just before it is discharged from the ducts.
4. A system may utilize a bypass setup where the air can be diverted past the coil(s) if it does not need to be
treated.
5. Humidification tubes may not be present in every unit or may be farther down in the ductwork just before
the diffusers.
6. A return fan may not be present on every unit if the supply fan creates enough of a draw to pull the air
back through the space.
Dual Duct Air Handling Unit
Components/Layout:
Filters
Supply Fan
Cooling Coil
Heating Coil
Humidifier
Mixing Box
Diffuser
Outside Air
Return Fan
IPI’s Methodology for Implementing Sustainable Energy-Saving Strategies in Collections Environments (2017)
13
Air Flow:
Starting at point A on the diagram above, return air passes through the filters on the system and is drawn into the
supply fan. The air is then pushed into the dual duct section of the unit. It will now separate into two ducts, one
that will handle the heating functions and one that will handle the cooling functions:
Route One/Cooling – Air enters into the cooling duct (C). Here the air is mixed with outside air. This air now
becomes a mixed condition of return air and outside air and passes over the cooling coil. Here the air is cooled
and, depending on the dew point of the passing air, may be dehumidified. After passing over the cooling coil the
air will proceed through the ductwork and be mixed with the heated air in a mixing box (F).
Route Two/Heating – Air enters into the heating duct (D). Here the air will pass over a set of heating coils that
heat the passing air. Next it passes over the humidifier. If the relative humidity of the passing air is too low the
humidifier will add moisture to the air and will continue moving through the ductwork towards the mixing box (F).
At the Mixing Box – The mixing box is the location in the ductwork where the heating and cooling ducts
combine. Here the heated air is mixed with cooled air to achieve the desired temperature for the space. The
mixing of air is controlled by a sensor that adjusts dampers on the entering heating or cooling air, opening or
closing them, to ensure that the right mix of air is used to create the desired supply temperature.
After the mixing box, the mixed air continues down the ductwork. The air passes through the diffuser (G) and
enters the space. Eventually the air is drawn back into the return ductwork and pushed through the return fan (I).
From here it will either be exhausted or returned to the start of the system to begin the process again.
Refrigerant/Heating Supply
PSDH210-2SS4 1SFA885308-BSL 驱动控制器 ABB
