机箱机柜冷却器 | Nex Flow Air Products

机箱机柜冷却器

The Patented Frigid-X™ NEMA Type 4-4X-316L (IP66) Stainless Steel Panel Coolers are ideal for the pharmaceutical industry and extreme corrosive environments where 303/304 stainless steel is not adequate.

产品概述

Frigid-X系列机箱机柜冷却器是专用于电控机箱、机柜的冷却器。它采用不锈钢涡流管利用普通压缩空气来产生成冷空气,是可用于电控机箱吹扫和冷却的低成本装置。

我们的机箱机柜冷却器系列产品结构紧凑,采用标准电器卡口进行安装,几分钟内即可安装完成。产品采用不锈钢材质,防雨雪、耐湿,可在普通户外使用,还可用于腐蚀性环境。

Nex Flow™有4种电气机箱冷却器,均获得UL认证且符合NEMA标准:

Frigid-X机箱机柜冷却器NEMA 12IP-52型,适用于一般工业环境下,没有直接液体喷溅的电控机箱。Frigid-X机箱机柜冷却器NEMA 3RIP-14,适用于户外电控机箱。

Frigid-X机箱冷却器NEMA 4-4X(IP-66)型,适用于电子控制机箱——具有耐溅水特点,可用于冲洗环境和户外作业。拥有独特的专利设计*,安全防水。Frigid-X机箱冷却器NEMA 4-4X-316L(IP-66)型,专利产品*,采用316L不锈钢材质,防尘、防油、防喷溅,适用于有液体的环境、与食品服务相关的环境、腐蚀性环境等。

*美国专利号8 616 010/其他国家:已获专利或正在申请

注意:请务必慎用不合规的产品来处理您的电气箱柜,以免您劣质产品损坏您的机箱。

Nex Flow™为每一台售出的Frigid-X机箱冷却器都免费附送一种高温警告贴纸。如果控制机箱内部的温度过高,则可能会损坏机箱内部设备并可能引起工厂意外停止运行。当贴纸颜色变为橙色时,表示有效警告,当颜色变为红色时,则表示高温危险警告。颜色变化是可逆的,当温度恢复正常后,贴纸还可以继续无限次地重复使用。虽然它只是一种定性的检测方式,但却可以监控机箱内部温度,并且在温度过高时起到简单有效的警告作用。

特点/优势

  • 成本低
  • 结构紧凑
  • 无氯氟烃(CFCs)
  • 安装快速
  • 可稳定机箱/机柜内温度和湿度
  • 基本无需维护(无活动部件)
  • 采用标准电气卡口安装
  • 防止过热损毁和频繁跳闸
  • 淘汰风扇和过滤器
  • 让机柜内保持正压,从而防止外来污染
  • 适用于各种环境,包括高达200℉的高温环境

Videos

机箱机柜冷却器工作原理

Overheating electrical and electronic control panels cause plant shutdowns and costly maintenance issues if not addressed.  In many cases regular air conditioning is adequate to address cooling.  But some factory environments are better suited to vortex tube operated systems such as the Frigid-XTM Panel Cooler.  If you find that your air conditioners are breaking down often because of a nasty factory environment or high vibration causing damage or frequent service and recharging, or if filters require frequent change (and disposal which is an extra cost) then these cooling systems are economical to use.

压缩空气从(A)处进入机箱冷却器的涡流管,然后在涡流管内分成热气(B)和冷气(C)两股气流。其中热气流经(D)处消声处理后从涡流管排向大气。从机箱/机柜冷却器置换的热空气通过(E)处排出来。而涡流管内的冷气流则经由冷气分配软管(G)进入机箱内部(F)。软管上有许多小孔(H),将冷气送入机箱各处相应位置。(I)为剩余冷空气排出口处的消声器,可进一步降低气流排出所产生的噪音。

The Frigid-X™ Panel Coolers are all RUL tested and approved with three NEMA ratings with equivalent IP rating for other countries – NEMA 12 (IP 54) versions for most control panels, NEMA 3R (IP14) for outside use, and NEMA 4-4X (IP66) for corrosive atmospheres.  Material is normally 304 stainless bit 316L stainless steel versions also available if required.
Normally Panel Coolers are mounted on the top of control cabinets but if there is no room, side mount systems are available.   A Thermostat and Solenoid valve package or Electronic Control System will turn the Panel Cooler on or off as required saving compressed air.  In very dirty environments, where a small amount of compressed flow is desired in the enclosure for purging (to keep out a dirty environment) and optional ByPass System is available.

Dimensions

mini cabinet cooler dimensions
medium cabinet cooler dimensions

可选款型

Panel Coolers, Panel Cooler, Panel Air Conditioner, Cabinet Enclosure Cooler, Electrical Panel Air Conditioners, Cabinet Cooling Solution, Cooler Master Cabinet, Panel Air Conditioner, Adjustable Thermostat, Electrical Panel Coolers, How to Cool Electrical Enclosures, Electronic Temperature Control

机箱机柜冷却器配有一个精度为5微米的过滤器,带自动排水功能(316L不锈钢款除外),确保了吸入的压缩空气的洁净、干燥。同时配有一套空气分配软管,让冷空气在箱柜内得以均匀分布。

我们还有温控配件,客户可自由选择是否购买。

如果您有长时间恒定地冷却和吹扫需求,推荐使用不带温控器与电磁阀的持续运行款。有必要时,还可给它外接一个调节器来减少气压,以便降低冷却效果,节约能源。

温控器与电磁阀只会在内部温度达到临界水平时,才会启动调节功能,节省进气量。可调式温控器的默认临界温度为95℉,您可根据实际需要重新设定。

针对那些产热起伏非常大(如,变频驱动器等)或者没有持续吹扫需求的环境,我们推荐使用温控器与电磁阀系统。在持续系统中也可以加入温控器与电磁阀“套装”,或者选择日后再补充加入该套装。还可以使用电子温控器系统来替代温控器与电磁阀系统,通过控制器来“设定”温度(即ELC系统)。

如果电控机箱的顶部无法安装机箱机柜冷却器,也可将其侧面安装(316L不锈钢除外)。机箱机柜冷却器必须要竖直安装在机箱/机柜的顶部或侧面。

Contact Nex Flow™ for assistance in sizing cabinet enclosure cooler – Frigid-X series. See Below for Sizing Specifications

MODEL NO. VERSION BTU/Hr. cooling*(WATTS) dBA at 80 PSIG (5.5 bar)
61004A NEMA Type 12 (IP-54) Continuous Operation 290 (85) 64
61008A NEMA Type 12 (IP-54) Continuous Operation 580 (170) 66
61015A NEMA Type 12 (IP-54) Continuous Operation 1100 (322) 72
61025A NEMA Type 12 (IP-54) Continuous Operation 1800 (527) 73
61030A NEMA Type 12 (IP-54) Continuous Operation 2100 (615) 74
61040A NEMA Type 12 (IP-54) Continuous Operation 2900 (849) 76
63004A NEMA Type 12 (IP-54) Continuous Operation 290 (85) 64
63008A NEMA Type 12 (IP-54) on-off control 580 (170) 66
63015A NEMA Type 12 (IP-54) on-off control 1100 (322) 72
63025A NEMA Type 12 (IP-54) on-off control 1800 (527) 73
63030A NEMA Type 12 (IP-54) on-off control 2100 (615) 74
63040A NEMA Type 12 (IP-54) on-off control 2900 (849) 76
61004R NEMA Type 3R (IP14) Continuous Operation 290 (85) 64
61008R NEMA Type 3R (IP-14) Continuous Operation 580 (170) 66
61015R NEMA Type 3R (IP-14) Continuous Operation 1100 (322) 72
61025R NEMA Type 3R (IP-14) Continuous Operation 1800 (527) 73
61030R NEMA Type 3R (IP-14) Continuous Operation 2100 (615) 74
61040R NEMA Type 3R (IP-14) Continuous Operation 2900 (849) 76
63004R NEMA Type 3R (IP-14) on-off control 290 (85) 64
63008R NEMA Type 3R (IP-14) on-off control 580 (170)) 66
63015R NEMA Type 3R (IP-14) on-off control 1100 (322) 72
63025R NEMA Type 3R (IP-14) on-off control 21800 (527) 73
63030R NEMA Type 3R (IP-14) on-off control 2100 (615) 74
63040R NEMA Type 3R (IP-14) on-off control 2900 (849) 76
61104X NEMA Type 4-4X (IP-66) Continuous Operation 290 (85) 64
61108X NEMA Type 4-4X (IP-66) Continuous Operation 580 (170) 66
61115X NEMA Type 4-4X (IP-66) Continuous Operation 1100 (322) 72
61125X NEMA Type 4-4X (IP-66) Continuous Operation 1800 (527) 73
61130X NEMA Type 4-4X (IP-66) Continuous Operation 2100 (615) 74
61140X NEMA Type 4-4X (IP-66) Continuous Operation 2900 (849) 76
63104X NEMA type 4-4X (IP-66) on-off control 290 (85) 64
63108X NEMA Type 4-4X (IP-66) on-off control 580 (170)) 66
63115X NEMA Type 4-4X (IP-66) on-off control 1100 (322) 72
63125X NEMA Type 4-4X (IP-66) on-off control 21800 (527) 73
63130X NEMA Type 4-4X (IP-66) on-off control 2100 (615) 74
63140X NEMA Type 4-4X (IP-66) on-off control 2900 (849) 76
60115X-316L 316 L Stainless Steel NEMA Type 4-4X (IP-66) on-off control (customer supplies own filter)** 1100 (322) 72
60125X-316L 316 L Stainless Steel NEMA Type 4-4X (IP-66) on-off control (customer supplies own filter)** 21800 (527) 73
60130X-316L 316 L Stainless Steel NEMA Type 4-4X (IP-66) on-off control (customer supplies own filter)** 2100 (615) 74
60140X-316L 316 L Stainless Steel NEMA Type 4-4X (IP-66) on-off control (customer supplies own filter)** 2900 (849) 76

** In 316 environments customers will normally have special filtration systems  already in place.

*Cooling effect based on 95°F temperature inside cabinet, 100 PSIG (6.9 BAR) compressor inlet pressure, and 70ºF (21ºC) inlet temperature.

BTU/hr. figures rounded to nearest 100 BTU/hr (1 WATT).

All Continuous Operation models include the cooling unit, filter with auto drain and cold air distribution kit.

All On-Off control units include the cooling unit, filter with auto drain, cold air distribution kit, solenoid valve and thermostat.

Calculating Head Load

Total heat load consists of the heat transfer from outside your panel and from the heat dissipated inside the control unit.

Useful terms and conversions:

1 BTU/hr = 0.293 watts
1 BTU/hr – 0.000393 horsepower
1 Watt = 3.415 BTU/hr
1 horsepower = 2544 BTU/hr
1 Watt = 0.00134 horsepower
1 Square Foot = 0.0929 square meters
1 Square Meter = 10.76 square foot

Typical fan capacity:

4″ fan: 100 CFM (2832 LPM)
6″ fan: 220 CFM (6230 LPM)
8″ fan: 340 CFM (9628 LPM)
10″ fan 550 CFM (15574 LPM)

BTU/hr. cooling effect from fan 1.08 x (temp. inside panel in °F – temp. outside panel in degrees F) x CFM.

Watts cooling effect from fan: 0.16 x (temp. inside panel in °C – temp. outside panel in degrees C) x LPM.

Calculating BTU/hr. or Watts:

  1. Determine the heat generated inside the enclosure. Approximations may be necessary. For example, if you know the power generated inside the unit, assume 10% of the energy is dissipated as heat.
  2. For heat transfer from the outside, calculate the area exposed to the atmosphere except for the top of the control panel.
  3. Choose the internal temperature you wish to have, and choose the temperature difference between it and the maximum external temperature expected.
  4. From the conversion table that follows, determine the BTU/hr. per square foot (or watts per square meter) for the temperature difference.
  5. Multiply the panel surface area times the BTU/hr. per square foot (or watts per square meter) to get the external heat transfer in BTU/hr or in watts.
  6. Sum the internal and external heat loads calculated.
  7. If you do not know the power used in the enclosure but you can measure temperatures, then measure the temperature difference between the outside at current temperature, and the present internal cabinet temperature.
  8. Note size and number of any external fans. Provide this information to Nex Flow™  to assist in sizing the appropriate cooling system.
Temperature Difference in °F BTU/hr./sq. ft. Temperature Difference in °C Watts/sq.m
5 1.5 3 5.2
10 3.3 6 11.3
15 5.1 9 17.6
20 7.1 12 24.4
25 9.1 15 31.4
30 11.3 18 39.5
35 13.8 21 47.7
40 16.2 24 55.6

Example:

The control panel cooler has two frequency drives totaling 10 horsepower and one module rated at 100 watts. The maximum outside temperature expected is 105°F or 40.5°C. The area of the control panel cooler exposed sides, except for the top is 42 square feet or 3.9 square meters. We want the internal temperature to be 95° or 35°C.

Total internal power is 10 hp x 746 watts/hp – 7460 plus 100 watts = 7560 watts.
Assume 10% forms heat = an internal heat load of 756 watts.

Or

Total internal power is 10 hp x 2544 BTU/hp = 25440 BTU/hr plus 100 watts x 3.415 BTU/hr/watt = 25782 BTU/hr.

Assume 10% forms heat = an internal heat load of 2578 BTU/hr.

External heat load: The temperature difference between the desired temperature and the outside is 10°F or 5.5°C. Using the conversions (and interpolating where necessary) we multiply the area by the conversion factor:

42 sq. ft x 3.3 – 139 BTU/hr or 3.9 sq. m x 10.3 = 40 watts

Total Heat Load: 756 + 40 – 796 watts or 2578 + 139 – 2717 BTU/hr.

You would use a Model 61040 for constant operation or a Model 63040 for one-off control. (Rated at 2900 BTU/hr or 849 watts).


Prices are in US dollars – ex works Cincinnati, OH, USA for orders

in USA and Richmond Hill, ON, Canada for international orders.

Tel : +1-416-410-1313   Fax : +1-416-410-180 or +1-716-626-3001

website : www.nexflow.com

email : sales@nexflow.com


Overview

产品概述

Frigid-X系列机箱机柜冷却器是专用于电控机箱、机柜的冷却器。它采用不锈钢涡流管利用普通压缩空气来产生成冷空气,是可用于电控机箱吹扫和冷却的低成本装置。

我们的机箱机柜冷却器系列产品结构紧凑,采用标准电器卡口进行安装,几分钟内即可安装完成。产品采用不锈钢材质,防雨雪、耐湿,可在普通户外使用,还可用于腐蚀性环境。

Nex Flow™有4种电气机箱冷却器,均获得UL认证且符合NEMA标准:

Frigid-X机箱机柜冷却器NEMA 12IP-52型,适用于一般工业环境下,没有直接液体喷溅的电控机箱。Frigid-X机箱机柜冷却器NEMA 3RIP-14,适用于户外电控机箱。

Frigid-X机箱冷却器NEMA 4-4X(IP-66)型,适用于电子控制机箱——具有耐溅水特点,可用于冲洗环境和户外作业。拥有独特的专利设计*,安全防水。Frigid-X机箱冷却器NEMA 4-4X-316L(IP-66)型,专利产品*,采用316L不锈钢材质,防尘、防油、防喷溅,适用于有液体的环境、与食品服务相关的环境、腐蚀性环境等。

*美国专利号8 616 010/其他国家:已获专利或正在申请

注意:请务必慎用不合规的产品来处理您的电气箱柜,以免您劣质产品损坏您的机箱。

Nex Flow™为每一台售出的Frigid-X机箱冷却器都免费附送一种高温警告贴纸。如果控制机箱内部的温度过高,则可能会损坏机箱内部设备并可能引起工厂意外停止运行。当贴纸颜色变为橙色时,表示有效警告,当颜色变为红色时,则表示高温危险警告。颜色变化是可逆的,当温度恢复正常后,贴纸还可以继续无限次地重复使用。虽然它只是一种定性的检测方式,但却可以监控机箱内部温度,并且在温度过高时起到简单有效的警告作用。

Advantages

特点/优势

  • 成本低
  • 结构紧凑
  • 无氯氟烃(CFCs)
  • 安装快速
  • 可稳定机箱/机柜内温度和湿度
  • 基本无需维护(无活动部件)
  • 采用标准电气卡口安装
  • 防止过热损毁和频繁跳闸
  • 淘汰风扇和过滤器
  • 让机柜内保持正压,从而防止外来污染
  • 适用于各种环境,包括高达200℉的高温环境
Videos

Videos

机箱机柜冷却器工作原理

Overheating electrical and electronic control panels cause plant shutdowns and costly maintenance issues if not addressed.  In many cases regular air conditioning is adequate to address cooling.  But some factory environments are better suited to vortex tube operated systems such as the Frigid-XTM Panel Cooler.  If you find that your air conditioners are breaking down often because of a nasty factory environment or high vibration causing damage or frequent service and recharging, or if filters require frequent change (and disposal which is an extra cost) then these cooling systems are economical to use.

压缩空气从(A)处进入机箱冷却器的涡流管,然后在涡流管内分成热气(B)和冷气(C)两股气流。其中热气流经(D)处消声处理后从涡流管排向大气。从机箱/机柜冷却器置换的热空气通过(E)处排出来。而涡流管内的冷气流则经由冷气分配软管(G)进入机箱内部(F)。软管上有许多小孔(H),将冷气送入机箱各处相应位置。(I)为剩余冷空气排出口处的消声器,可进一步降低气流排出所产生的噪音。

The Frigid-X™ Panel Coolers are all RUL tested and approved with three NEMA ratings with equivalent IP rating for other countries – NEMA 12 (IP 54) versions for most control panels, NEMA 3R (IP14) for outside use, and NEMA 4-4X (IP66) for corrosive atmospheres.  Material is normally 304 stainless bit 316L stainless steel versions also available if required.
Normally Panel Coolers are mounted on the top of control cabinets but if there is no room, side mount systems are available.   A Thermostat and Solenoid valve package or Electronic Control System will turn the Panel Cooler on or off as required saving compressed air.  In very dirty environments, where a small amount of compressed flow is desired in the enclosure for purging (to keep out a dirty environment) and optional ByPass System is available.

Dimensions

Dimensions

mini cabinet cooler dimensions
medium cabinet cooler dimensions
可选款型

可选款型

Panel Coolers, Panel Cooler, Panel Air Conditioner, Cabinet Enclosure Cooler, Electrical Panel Air Conditioners, Cabinet Cooling Solution, Cooler Master Cabinet, Panel Air Conditioner, Adjustable Thermostat, Electrical Panel Coolers, How to Cool Electrical Enclosures, Electronic Temperature Control

机箱机柜冷却器配有一个精度为5微米的过滤器,带自动排水功能(316L不锈钢款除外),确保了吸入的压缩空气的洁净、干燥。同时配有一套空气分配软管,让冷空气在箱柜内得以均匀分布。

我们还有温控配件,客户可自由选择是否购买。

如果您有长时间恒定地冷却和吹扫需求,推荐使用不带温控器与电磁阀的持续运行款。有必要时,还可给它外接一个调节器来减少气压,以便降低冷却效果,节约能源。

温控器与电磁阀只会在内部温度达到临界水平时,才会启动调节功能,节省进气量。可调式温控器的默认临界温度为95℉,您可根据实际需要重新设定。

针对那些产热起伏非常大(如,变频驱动器等)或者没有持续吹扫需求的环境,我们推荐使用温控器与电磁阀系统。在持续系统中也可以加入温控器与电磁阀“套装”,或者选择日后再补充加入该套装。还可以使用电子温控器系统来替代温控器与电磁阀系统,通过控制器来“设定”温度(即ELC系统)。

如果电控机箱的顶部无法安装机箱机柜冷却器,也可将其侧面安装(316L不锈钢除外)。机箱机柜冷却器必须要竖直安装在机箱/机柜的顶部或侧面。

Contact Nex Flow™ for assistance in sizing cabinet enclosure cooler – Frigid-X series. See Below for Sizing Specifications

MODEL NO. VERSION BTU/Hr. cooling*(WATTS) dBA at 80 PSIG (5.5 bar)
61004A NEMA Type 12 (IP-54) Continuous Operation 290 (85) 64
61008A NEMA Type 12 (IP-54) Continuous Operation 580 (170) 66
61015A NEMA Type 12 (IP-54) Continuous Operation 1100 (322) 72
61025A NEMA Type 12 (IP-54) Continuous Operation 1800 (527) 73
61030A NEMA Type 12 (IP-54) Continuous Operation 2100 (615) 74
61040A NEMA Type 12 (IP-54) Continuous Operation 2900 (849) 76
63004A NEMA Type 12 (IP-54) Continuous Operation 290 (85) 64
63008A NEMA Type 12 (IP-54) on-off control 580 (170) 66
63015A NEMA Type 12 (IP-54) on-off control 1100 (322) 72
63025A NEMA Type 12 (IP-54) on-off control 1800 (527) 73
63030A NEMA Type 12 (IP-54) on-off control 2100 (615) 74
63040A NEMA Type 12 (IP-54) on-off control 2900 (849) 76
61004R NEMA Type 3R (IP14) Continuous Operation 290 (85) 64
61008R NEMA Type 3R (IP-14) Continuous Operation 580 (170) 66
61015R NEMA Type 3R (IP-14) Continuous Operation 1100 (322) 72
61025R NEMA Type 3R (IP-14) Continuous Operation 1800 (527) 73
61030R NEMA Type 3R (IP-14) Continuous Operation 2100 (615) 74
61040R NEMA Type 3R (IP-14) Continuous Operation 2900 (849) 76
63004R NEMA Type 3R (IP-14) on-off control 290 (85) 64
63008R NEMA Type 3R (IP-14) on-off control 580 (170)) 66
63015R NEMA Type 3R (IP-14) on-off control 1100 (322) 72
63025R NEMA Type 3R (IP-14) on-off control 21800 (527) 73
63030R NEMA Type 3R (IP-14) on-off control 2100 (615) 74
63040R NEMA Type 3R (IP-14) on-off control 2900 (849) 76
61104X NEMA Type 4-4X (IP-66) Continuous Operation 290 (85) 64
61108X NEMA Type 4-4X (IP-66) Continuous Operation 580 (170) 66
61115X NEMA Type 4-4X (IP-66) Continuous Operation 1100 (322) 72
61125X NEMA Type 4-4X (IP-66) Continuous Operation 1800 (527) 73
61130X NEMA Type 4-4X (IP-66) Continuous Operation 2100 (615) 74
61140X NEMA Type 4-4X (IP-66) Continuous Operation 2900 (849) 76
63104X NEMA type 4-4X (IP-66) on-off control 290 (85) 64
63108X NEMA Type 4-4X (IP-66) on-off control 580 (170)) 66
63115X NEMA Type 4-4X (IP-66) on-off control 1100 (322) 72
63125X NEMA Type 4-4X (IP-66) on-off control 21800 (527) 73
63130X NEMA Type 4-4X (IP-66) on-off control 2100 (615) 74
63140X NEMA Type 4-4X (IP-66) on-off control 2900 (849) 76
60115X-316L 316 L Stainless Steel NEMA Type 4-4X (IP-66) on-off control (customer supplies own filter)** 1100 (322) 72
60125X-316L 316 L Stainless Steel NEMA Type 4-4X (IP-66) on-off control (customer supplies own filter)** 21800 (527) 73
60130X-316L 316 L Stainless Steel NEMA Type 4-4X (IP-66) on-off control (customer supplies own filter)** 2100 (615) 74
60140X-316L 316 L Stainless Steel NEMA Type 4-4X (IP-66) on-off control (customer supplies own filter)** 2900 (849) 76

** In 316 environments customers will normally have special filtration systems  already in place.

*Cooling effect based on 95°F temperature inside cabinet, 100 PSIG (6.9 BAR) compressor inlet pressure, and 70ºF (21ºC) inlet temperature.

BTU/hr. figures rounded to nearest 100 BTU/hr (1 WATT).

All Continuous Operation models include the cooling unit, filter with auto drain and cold air distribution kit.

All On-Off control units include the cooling unit, filter with auto drain, cold air distribution kit, solenoid valve and thermostat.

Calculating Heat Load

Calculating Head Load

Total heat load consists of the heat transfer from outside your panel and from the heat dissipated inside the control unit.

Useful terms and conversions:

1 BTU/hr = 0.293 watts
1 BTU/hr – 0.000393 horsepower
1 Watt = 3.415 BTU/hr
1 horsepower = 2544 BTU/hr
1 Watt = 0.00134 horsepower
1 Square Foot = 0.0929 square meters
1 Square Meter = 10.76 square foot

Typical fan capacity:

4″ fan: 100 CFM (2832 LPM)
6″ fan: 220 CFM (6230 LPM)
8″ fan: 340 CFM (9628 LPM)
10″ fan 550 CFM (15574 LPM)

BTU/hr. cooling effect from fan 1.08 x (temp. inside panel in °F – temp. outside panel in degrees F) x CFM.

Watts cooling effect from fan: 0.16 x (temp. inside panel in °C – temp. outside panel in degrees C) x LPM.

Calculating BTU/hr. or Watts:

  1. Determine the heat generated inside the enclosure. Approximations may be necessary. For example, if you know the power generated inside the unit, assume 10% of the energy is dissipated as heat.
  2. For heat transfer from the outside, calculate the area exposed to the atmosphere except for the top of the control panel.
  3. Choose the internal temperature you wish to have, and choose the temperature difference between it and the maximum external temperature expected.
  4. From the conversion table that follows, determine the BTU/hr. per square foot (or watts per square meter) for the temperature difference.
  5. Multiply the panel surface area times the BTU/hr. per square foot (or watts per square meter) to get the external heat transfer in BTU/hr or in watts.
  6. Sum the internal and external heat loads calculated.
  7. If you do not know the power used in the enclosure but you can measure temperatures, then measure the temperature difference between the outside at current temperature, and the present internal cabinet temperature.
  8. Note size and number of any external fans. Provide this information to Nex Flow™  to assist in sizing the appropriate cooling system.
Temperature Difference in °F BTU/hr./sq. ft. Temperature Difference in °C Watts/sq.m
5 1.5 3 5.2
10 3.3 6 11.3
15 5.1 9 17.6
20 7.1 12 24.4
25 9.1 15 31.4
30 11.3 18 39.5
35 13.8 21 47.7
40 16.2 24 55.6

Example:

The control panel cooler has two frequency drives totaling 10 horsepower and one module rated at 100 watts. The maximum outside temperature expected is 105°F or 40.5°C. The area of the control panel cooler exposed sides, except for the top is 42 square feet or 3.9 square meters. We want the internal temperature to be 95° or 35°C.

Total internal power is 10 hp x 746 watts/hp – 7460 plus 100 watts = 7560 watts.
Assume 10% forms heat = an internal heat load of 756 watts.

Or

Total internal power is 10 hp x 2544 BTU/hp = 25440 BTU/hr plus 100 watts x 3.415 BTU/hr/watt = 25782 BTU/hr.

Assume 10% forms heat = an internal heat load of 2578 BTU/hr.

External heat load: The temperature difference between the desired temperature and the outside is 10°F or 5.5°C. Using the conversions (and interpolating where necessary) we multiply the area by the conversion factor:

42 sq. ft x 3.3 – 139 BTU/hr or 3.9 sq. m x 10.3 = 40 watts

Total Heat Load: 756 + 40 – 796 watts or 2578 + 139 – 2717 BTU/hr.

You would use a Model 61040 for constant operation or a Model 63040 for one-off control. (Rated at 2900 BTU/hr or 849 watts).

Pricing

Prices are in US dollars – ex works Cincinnati, OH, USA for orders

in USA and Richmond Hill, ON, Canada for international orders.

Tel : +1-416-410-1313   Fax : +1-416-410-180 or +1-716-626-3001

website : www.nexflow.com

email : sales@nexflow.com


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