CH091A-11-2105S 编码器用于控制传输速度 Kollmorgen
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：
冷却盘管由冷却源供给，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传递到
穿过它的空气。
系统变化：
1.可以在冷却盘管之前或空气处理单元上的过滤器之前找到外部空气管道，
这取决于设计。
2.系统可具有多组过滤器以去除不同水平的杂质。
3.如果外部空气管道位于冷却盘管之前，则过滤器可能位于外部空气风门之前，或者
冷却盘管，用于处理进入系统的新空气。
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.加湿管可能不存在于每个装置中。加湿盘管也可能出现在
冷却盘管。
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。
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IPI在环境中实施可持续节能战略的方法（2017年）
可变风量（VAV）系统
组件/布局：
加热线圈
空气流量传感器
阻尼器
促动器
控制器
接触器
恒温器
空气流量：
VAV代表可变风量，VAV箱可以是空气处理系统的一部分。它们位于
空气到达指定空间之前的管道系统。来自空气处理装置的一次空气被推向下游
至VAV箱。就在变风量箱之前，有一组风门（C）。这些风门由空气控制
流量传感器（B）或空间恒温器（G），其将命令致动器（D）打开或关闭，以调整
推动穿过加热线圈的空气量（可选）。当空气进入VAV时，加热线圈在内部
必要时将加热空气。当空气被加热时，它被推出VAV箱，并被输送到空间
二次空气。如果不需要加热，则接触器将不会启动加热线圈，空气随之流动
没有暖气。
系统变化：
1.加热线圈可能不存在于每个单元中。
2.风扇可位于VAV内部，以在风量较低时增加空气速度。
3.在某些情况下，可能存在加湿器。
直接膨胀（DX）独立空调系统
组件/布局：
电容线圈
风扇
压缩机
膨胀阀
蒸发器盘管
恒温器
暖湿空气
冷气
暖湿空气
干热空气
IPI在环境中实施可持续节能战略的方法（2017年）
15
空气流量：
在空间内，空气通过装置的侧面吸入。空气被推过蒸发器（冷却）
盘管，将其冷却至房间所需温度，并将风门推到
单元该系统设计用于合理地冷却通过的空气，任何可能发生的除湿都是
这一行动。空气经过处理后，可能会在处理过程中失去一些水分，但排出的较冷空气会
相对湿度高于进入的空气。
在装置的外部，外部空气从装置的侧面吸入。空气由风扇推动
穿过冷凝器盘管，通过的空气将吸收盘管的热量并从后部排出
单位的。排出的空气将比外部空气更热、更干燥。
CH091A-11-2105S 编码器用于控制传输速度 Kollmorgen
CH091A-11-2105S 编码器用于控制传输速度 Kollmorgen
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:
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 boiler or electricity. The heat from these coils is transferred to
the air passing over it.
System Variations:
1. An outside air duct can be found either before the cooling coil or before the filters on the air handling unit,
depending on the design.
2. A system may have multiple sets of filters to remove different levels of impurities.
3. If the outside air duct is before the cooling coil the filters may be located before the outside air damper or
cooling coil to treat the new air coming into the system.
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. A humidification coil may also be present after the
cooling coil.
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.
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IPI’s Methodology for Implementing Sustainable Energy-Saving Strategies in Collections Environments (2017)
Variable Air Volume (VAV) System
Components/Layout:
Heating Coils
Air Flow Sensor
Dampers
Actuator
Controller
Contactors
Thermostat
Air Flow:
VAV stands for variable air volume, and VAV boxes may be a part of an air handling system. They are located in
ductwork before the air reaches a designated space. Primary air from the air handling unit is pushed downstream
to a VAV box. Just before the VAV box there are a set of dampers (C). These dampers are controlled by an air
flow sensor (B) or a space thermostat (G) that will command the actuator (D) to open or close to adjust the
volume of air that is pushed across the heating coils (optional). When air enters a VAV the heating coils inside
will heat the air if necessary. As the air is heated it is pushed out of the VAV box and delivered to the space as
secondary air. If no heating is required the contactor will not activate the heating coils and the air passes on with
no heating.
System Variations:
1. A heating coil may not be present in every unit.
2. A fan may be located inside the VAV to increase air velocity when air volume is low.
3. In some cases a humidifier may be present.
Direct Expansion (DX) Individual Air Conditioning System
Components/Layout:
Condenser Coil
Fans
Compressor
Expansion Valve
Evaporator Coil
Thermostat
Warm Moist Air
Cool Air
Warm Moist Air
Hot Dry Air
IPI’s Methodology for Implementing Sustainable Energy-Saving Strategies in Collections Environments (2017)
15
Air Flow:
Inside the space air is drawn in through the sides of the unit. This air is pushed across the evaporator (cooling)
coils where it is cooled to the desired temperature for the room and pushed out the dampers on the front of the
unit. The system is designed to sensibly cool the passing air, any dehumidification that may occur is a byproduct of
this action. As the air is treated it may lose some of its moisture in the process, but the exiting cooler air will have
higher relative humidity than the entering air.
On the outside portion of the unit, outside air is drawn in from the sides of the unit. This air is pushed by a fan
across the condenser coils where the passing air will absorb the heat from the coils and be expelled out the rear
of the unit. The expelled air will be hotter and drier than the outside air.
CH091A-11-2105S 编码器用于控制传输速度 Kollmorgen
