ABB 过程控制主板 PP5302B 3ADT306400R0001 PP5302
空气流量：
在E点，鼓风机通过过滤器将空气吸入装置。风扇推动空气通过热量
交换器（C），其在空气通过时加热空气。由此产生的较暖空气通过供气管道输送
（B） 到空间。当热空气供应到空间时，较冷的空气被向下推动并被吸入
返回并被系统重用。装置通常会运行，直到满足空间温度，此时
熔炉关闭的时间。这些装置需要自由空气流才能运行，并且为了适当的空气流，应
打开回风管道和畅通无阻的空气通道，以帮助在操作时吸入空气。
系统变化：
1.一种系统可以利用多种方式中的一种来加热空气（气体燃烧器、电盘管、热泵或
循环盘管）。
2.单元的回风可能是实际的管道系统，也可能是切割到地板和墙壁上的回风格栅
创造流通。
3.根据设计，加湿装置可能位于加热线圈之后。
强制风冷
组件/布局：
排气扇
压缩机
电容线圈
膨胀阀
蒸发器盘管
加热线圈
鼓风机
滤器
供应管道
通风孔
室外进气
空气流量：
该装置采用强制空气炉的空气循环方法；然而，它也用于冷却
加热空气通过过滤器（H）吸入装置，并通过鼓风机（G）吸入。鼓风机推动
空气经过加热盘管或热交换器（F），但该盘管在冷却时不工作。空气继续过去
蒸发器盘管或冷却盘管（E）在空气通过时冷却空气。由此产生的空气通过
供应管道（I）通向空间。该系统的主要目标是合理地冷却通过的空气。任何除湿
这可能会成为这一过程的副产品。离开系统的较冷空气可能损失了一些
但将具有较高的相对湿度。该装置通常运行到空间
装置关闭时的温度满足要求。这些装置需要空气自由流动才能运行，并且必须
具有开放的回风管道或无障碍的空气路径，以实现IPI在环境中实施可持续节能战略的方法（2017年）
制冷剂/供暖供应：
该系统的工作原理与基本的空调器类似，只是在定位上有一些变化。膨胀阀（D），
压缩机（B）和冷凝器（C）位于建筑物外部，而蒸发器盘管（E）位于
熔炉制冷剂必须从内到外穿过长管
就在膨胀阀制冷剂作为低温低压液体启动之后开始。在此情况下
低压条件制冷剂具有低沸点。制冷剂被推过蒸发器
盘管，从流经盘管的热空气中吸收热量。从热空气中吸收的热量
使制冷剂沸腾并变成蒸汽。制冷剂继续通过系统流向
压缩机。当制冷剂进入压缩机时，制冷剂现在是低温低压蒸汽。
制冷剂进入压缩机，在那里被加压成高温高压蒸汽。
制冷剂现在处于非常高的压力下并且具有高沸点。在这些条件下，制冷剂
它很容易凝结。当制冷剂通过冷凝器盘管时，装置内的风扇推动空气
穿过线圈。当风扇推动空气通过散热片时，制冷剂将热量排出到通过的空气中。这个
通过的空气吸收热量，使制冷剂冷却并冷凝成液体。高压液体
向冷凝器出口即膨胀阀移动。制冷剂将作为高压进入阀
高温高压液体。该阀允许制冷剂的压力变化，制冷剂
将作为低温低压液体离开阀门，并重新开始该过程。
系统变化：
1.装置的回流可能是实际的管道系统，也可能是切割到地板和墙壁上的回流格栅
创造流通。
干燥剂轮
ABB 过程控制主板 PP5302B 3ADT306400R0001 PP5302
ABB 过程控制主板 PP5302B 3ADT306400R0001 PP5302
Air Flow:
Air is drawn into the unit through the filter by the blower fan, at point E. The fan pushes air past the heat
exchanger (C) which warms the air as it passes through. The resulting warmer air is sent through the supply duct
(B) to the space. As the warm air is supplied to the space, the cooler air is pushed down and is drawn into the
return and is reused by the system. A unit will typically operate until the space temperature is satisfied, at which
time the furnace turns off. These units require a free flow of air to operate and for proper air flow should have
open return air ducts and an unobstructed air path to help draw in air when operating.
System Variations:
1. A system may utilize one of a number of means to heat the air (gas burner, electric coils, heat pump, or
hydronic coils).
2. The return for a unit may be actual ductwork or may be return grates cut into the floors and walls to
create circulation.
3. Humidification unit may be present after the heating coil depending on the design.
Forced Air Cooling
Components/Layout:
Exhaust Fan
Compressor
Condenser Coil
Expansion Valve
Evaporator Coil
Heating Coil
Blower Fan
Filter
Supply Duct
Vent
Outside Air Intake
Air Flow:
This unit utilizes the air circulation methods of a forced air furnace; however it is being used for cooling as well as
heating. Air is drawn into the unit through the filter, (H), and is pulled through the blower (G). The blower pushes
air past the heating coil or heat exchanger (F), but this coil will not operate when cooling. The air continues past
to the evaporator coil or cooling coil (E), which cools the air as it passes through. The resulting air is sent through
the supply duct (I) to the space. The systems main goal is to sensibly cool the passing air. Any dehumidification
that may happen will be a byproduct of the process. The cooler air that exits the system may have lost some
moisture in the cooling process but will have a higher relative humidity. The unit will typically operate until space
temperature is satisfied at which time the unit turns off. These units require a free flow of air to operate and must
have open return air ducts or an unobstructed air path to IPI’s Methodology for Implementing Sustainable Energy-Saving Strategies in Collections Environments (2017)
Refrigerant/Heating Supply:
The system works like a basic air conditioner with a few changes in positioning. The expansion valve (D),
compressor (B) and condenser (C) are located outside of the building, while the evaporator coil (E) is inside the
furnace. The refrigerant must travel through long lengths of tubing from inside to outside
Beginning just after the expansion valve refrigerant starts off as a low temperature, low pressure liquid. Under this
low pressure condition the refrigerant has a low boiling point. The refrigerant is pushed through the evaporator
coil where it absorbs heat from warm air that is passing over the coils. The heat absorbed from the warm air
causes the refrigerant to boil and become a vapor. The refrigerant continues through the system toward the
compressor. As it enters the compressor the refrigerant is now a low temperature, low pressure vapor.
The refrigerant enters the compressor where it is pressurized into a high temperature, high pressure vapor.
The refrigerant is now under very high pressure and has a high boiling point. At these conditions, the refrigerant
can condense easily. As the refrigerant moves through the condenser coil the fan inside the unit pushes air
across the coils. The refrigerant will expel heat to the passing air as it is pushed though the fins by the fan. The
passing air absorbs the heat, causing the refrigerant to cool and condense into a liquid. The high-pressure liquid
moves towards the outlet of the condenser, the expansion valve. The refrigerant will enter the valve as a high
temperature, high pressure liquid. The valve allows the pressure of the refrigerant to change and the refrigerant
will exit the valve as a low temperature, low pressure liquid and start the process over again.
System Variations:
1. A return for the unit may be actual ductwork or may be return grates cut into the floors and walls to
create circulation.
Desiccant Wheel
ABB 过程控制主板 PP5302B 3ADT306400R0001 PP5302
