Thursday, March 26, 2015

8210 ASCO Valve Series - 1" - 2.5" Sizes

Anderson-Bolds and ASCO 8210 Series General Purpose Solenoid Valves
1", 1.25", 1.5", 2" and 2.5 Inch NPT valves (female threads)
The valves below are Normally Closed, energize to Open.
For a quote or Application help contact Anderson-Bolds HERE.

The ASCO 8210 Series is the most popular series for general purpose applications.  The valves are pilot operated, have diaphragms and have brass or Stainless Steel bodies and BUNA N (Nitrile) seals as standards.  The below valves are the bread and butter part numbers for most applications: 1 inch through 3 inch sizes.

8210G004 or 8210G4 120/60  (20077)  Repair kit  302280
1 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-150 psi water, 120 vac
20079 = Explosion Proof EF8210G004  120/60  VAC
20085 =  8210G004 240/60 VAC
20089 =  8210G004  24/60 VAC
20091 =  8210G004   24 vdc  (5-100 psi)
20078 =  8210G004MO 120/60 with Manual Operator

8210G054 or 8210G54 120/60  (21414)  Repair kit  302283
1 Inch NPT 2-way valve, Brass Body, Buna N seals, 0-125 psi water, 120/60 vac
21415 = Explosion Proof EF8210G054 120/60  VAC
00263 =  8210G054   24 vdc  (0-100 psi)

8210G089 or 8210G89 120/60  (21420)  Repair kit  302329
1 Inch NPT 2-way valve, Stl. Steel Body Buna N seals, 0-125 psi water, 120/60 vac
21744 = Explosion Proof EF8210G089 120/60  VAC - Stainless Steel Body

8210G027 or 8210G27 120/60  (21413)  Repair kit  302282
1 Inch NPT 2-way valve, Brass Body, Buna N seals, 0-300 psi water, 120/60 vac
21743 = Explosion Proof EF8210G027 120/60  VAC

8210G008 or 8210G8 120/60  (20102)  Repair kit  302280
1-1/4 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-150 psi water, 120 vac
20103 = Explosion Proof EF8210G008  120/60  VAC
20386 =  8210G008  24/60 VAC
20106 =  8210G008   24 vdc  (5-125 psi)

8210G055 or 8210G55 120/60  (21416)  Repair kit  302283
1-1/4 Inch NPT 2-way valve, Brass Body, Buna N seals, 0-125 psi water, 120/60 vac

8210G022 or 8210G822  120/60  (20132)  Repair kit  302284
1-1/2 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-150 psi water, 120 vac
20134 = Explosion Proof EF8210G022  120/60  VAC
20387 =  8210G022  24/60 VAC
20137 =  8210G022   24 vdc  (5-125 psi)

8210G056 or 8210G56 120/60  (21417)  Repair kit  302286
1-1/2 Inch NPT 2-way valve, Brass Body, Buna N seals, 0-125 psi water, 120/60 vac
21418 = Explosion Proof EF8210G054 120/60  VAC
00270 =  8210G054   24 vdc  (0-100 psi)

8210G100 or 8210G100 120/60  (20268)  Repair kit  302359
2 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-125 psi water, 120 vac
20270 = Explosion Proof EF8210G100  120/60  VAC
20275 =  8210G022   24 vdc  (5-50 psi)

8210G101 or 8210G101 120/60  (20276)  Repair kit  302355
2-1/2 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-125 psi water, 120 vac



Asco General Purpose Solenoid Valves



www.anderson-bolds.com
Since 1939 with ASCO
216-360-9800

Wednesday, March 25, 2015

ASCO 8210 Series Solenoid Valves - 3/8" - 3/4" NPT Size

Anderson-Bolds and ASCO 8210 Series General Purpose Solenoid Valves
3/8 NPT, 1/2 NPT, 3/4 NPT valves (All are female threads)
All valves are Normally Closed, energy to Open.
To get a quote contact Anderson-Bolds HERE.

The 8210 Series is ASCO's most popular series for general purpose applications.  The valves are pilot operated, have diaphragms and have brass bodies and buns N seals as standards.  The below valves are the bread and butter part numbers for most applications: 3/8", 1/2" and 3/4".

8210G001 or 8210G1 120/60  (20032)  Repair kit  302273
3/8 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-150 psi water, 120 vac
20034 = Explosion Proof EF8210G001  120/60  VAC
20036 =  8210G001 240/60 VAC
20039 =  8210G001  24/60 VAC
20014 =  8210G001   24 vdc  (5-100 psi)

8210G093 or 8210G93 120/60  (20221)  Repair kit  302272
3/8 Inch NPT 2-way valve, Brass Body, Buna N seals, 0-150 psi water, 120/60 vac
20224 = Explosion Proof EF8210G093  120/60  VAC
20222 =  8210G093HW 120/60 VAC
20228 =  8210G093    24 vdc  (0-40 psi)

8210G006 or 8210G6 120/60  (20093)  Repair kit  302274
3/8 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-300 psi water, 120 vac
20094 = Explosion Proof EF8210G006  120/60  VAC

8210G073 or 8210G73 120/60  (20194)  Repair kit  302271
3/8 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-125 psi water, 120 vac
20195 = Explosion Proof EF8210G073  120/60  VAC

8210G036 or 8210G36 120/60  (20176)  Repair kit  302326
3/8 Inch NPT 2-way valve, Stl. Steel Body, Buna N seals, 5-150 psi water, 120 vac
20178 = Explosion Proof EF8210G036  120/60  VAC - Stainless Steel Body

8210G002 or 8210G2 120/60  (20043)  Repair kit  302273
1/2 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-150 psi water, 120 vac
20049 =  Explosion Proof EF8210G002  120/60  VAC
20053 =  8210G002 240/60 VAC
20058 =  8210G002  24/60 VAC
20062 =  8210G002  24 vdc  (5-100 psi)
20048 =  8210G002V 120/60 and Viton Seals
20046 =  8210G002MO  120/60 with Manual Operator
21311 =  8210G002Q  120/60 and Quiet operating/high cycling

8210G094 or 8210G94 120/60  (20029)  Repair kit  302272
1/2 Inch NPT 2-way valve, Brass Body, Buna N seals, 0-150 psi water, 120 vac
20236 =  Explosion Proof EF8210G094  120/60  VAC
20243 =  8210G094 240/60 VAC
20246 =  8210G094  24/60 VAC
20248 =  8210G094   24 vdc  (0-40 psi)
20223 =  8210G094V 120/60 and Viton Seals
20231 =  8210G094MO  120/60 and Manual Operator

8210G015 or 8210G15 120/60  (20126)  Repair kit  302275
1/2 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-125 psi water, 120 vac
20127 =  Explosion Proof EF8210G015  120/60  VAC
20128 =  8210G015 240/60 VAC
20130 =  8210G015  24/60 VAC

8210G007 or 8210G7 120/60  (20095)  Repair kit  302274
1/2 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-300 psi water, 120 vac
20098 = Explosion Proof EF8210G007  120/60  VAC

8210G037 or 8210G37 120/60  (20179)  Repair kit  302327
1/2 Inch NPT 2-way valve, Stl. Steel Body, Buna N seals, 5-150 psi water, 120 vac
20181 = Explosion Proof EF8210G037  120/60  VAC - Stainless Steel Body

8210G087 or 8210G87 120/60  (20201)  Repair kit  302423
1/2 Inch  NPT 2-way valve, Stl. Steel Body, Buna N seals, 0-150 psi water, 120 vac
20204 = Explosion Proof EF8210G087  120/60  VAC - Stainless Steel Body
21722 =  8210G087  24vdc (0-40 psi)

8210G003 or 8210G3 120/60  (20064)  Repair kit  302279
3/4 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-150 psi water, 120 vac
20064 =  Explosion Proof EF8210G003  120/60  VAC
20076 =  8210G003  24 vdc  (5-125 psi)

8210G009 or 8210G9 120/60  (20107)  Repair kit  302277
3/4 Inch NPT 2-way valve, Brass Body, Buna N seals, 5-125 psi water, 120 vac
20110 =  Explosion Proof EF8210G009  120/60  VAC
20114 =  8210G009 240/60 VAC
20119 =  8210G009  24/60 VAC
20121 =  8210G009  24 vdc  (5-90 psi)
20109 =  8210G009 120/60 and Manual Operator (Kit # 302277-MO)

8210G095 or 8210G95 120/60  (20250)  Repair kit  302276
3/4 Inch NPT 2-way valve, Brass Body, Buna N seals, 0-150 psi water, 120 vac
20257 =  Explosion Proof EF8210G095  120/60  VAC
20262 =  8210G095 240/60 VAC
20265 =  8210G095  24/60 VAC
20267 =  8210G095   24 vdc  (0-40 psi)
20253 =  8210G095V 120/60 and Viton Seals (Kit # 302276-V)
20252 =  8210G095MO  120/60 and Manual Operator (302276-MO)

8210G088 or 8210G88 120/60  (20210)  Repair kit  302328
3/4 Inch  NPT 2-way valve, Stl. Steel Body, Buna N seals, 0-150 psi water, 120 vac
20213 = Explosion Proof EF8210G088  120/60  VAC - Stainless Steel Body
20211 =  8210G088E  120/60 and EPR Seals (Kit 302328-E)
21723 =  8210G088  24vdc (0-40 psi)





www.anderson-bolds.com
Since 1939 with ASCO
216-360-9800








Sunday, March 22, 2015

Air Curtain on Whole Building Energy Use

Summary of Energy use in Buildings with Air Curtains 

"The Best Air curtains on Earth Come From Mars"

The complete article with diagrams/graphs is HERE. (Click to view).


This study conducted the whole building energy analysis of the DOE medium office reference building for three different scenarios of building entrance:
  1. single door without vestibule or air curtain (hereafter, a single door)
  2. single door equipped with air curtain (hereafter, an air curtain door)
  3. single door with vestibule (hereafter, a vestibule door)
For the modeled medium office building, the major conclusions were found as follows.
  • The whole building annual energy use when the air curtain is installed is less in all the climate zones: it is less than the single door in the climate zone 1-3, and less than the vestibule door in the climate zone 3-8.
  • The modeled air curtain door is shown to reduce air infiltration significantly under the same conditions when compared to either the single door or the vestibule door.
  • The predicted annual pressure difference across the envelope of the modeled building is mostly within -10 ~ 10 Pa.
  • The modeled air curtain door is shown to provide comparable performance as the modeled vestibule door for the climate zone 3 – 8. Compared to the vestibule door, the air curtain door can save 0.3% ~ 2.2% energy for zone 3 ~ 8, corresponding to 1146 kWh ~ 18986 kWh. Better performance will be achieved for colder climate.
  • The major saving of the air curtain door comes from the heating saving so, although there is saving, the air curtain total saving in zone 1 – 2 is marginal, which is 0.0% ~ 0.1% (81 kWh ~ 132 kWh) when compared to the single door.
  • Building entrance orientation, building pressure, and door usage frequency all affect air infiltration/exfiltration and the resultant energy performance of the air curtain door. Particularly, the effects of building entrance orientation and the balance of the HVAC system cannot be overlooked and they were shown to be as important as door usage frequency.


Investigation of the Impact of Building Entrance Air Curtain on Whole Building Energy Use Executive Summary
BACKGROUND
The U.S. was reported to consume 19% of the global energy in 2011, and the building sector (residential, commercial and government buildings) accounted for about 41% of the primary energy usage. The top four end uses of the building sector are space heating (37%), space cooling (10%), water heating (12%), and lighting (9%), which sums up to about 70% of the buildings site energy consumption. For commercial buildings, air infiltrations can be as high as 18% of the total heat loss. Air infiltrations (or air leakages) are often caused by unintentional or accidental introduction of outside air into a building through cracks in the building envelope and/or entrance doors. Infiltrations through door openings become quite significant when the doors are used frequently such as in restaurants, retail stores, supermarkets, offices and hospitals (DOE 2012).
A common energy code solution to reducing energy loss from air infiltration through open doors has been requiring a vestibule rather than having a single door. Currently based on the American Society of Heating, Refrigerating and Air-Conditioning Engineers Standard 90.1 – Energy Standard for Buildings Except Low-Rise Residential Buildings (ASHRAE 2010), and the International Energy Conservation Code (IECC), in most cases, vestibules are required in climate zones 3 – 8. However, vestibules seem not to cater to building owners’ taste due to the concerns over space and construction cost. A vestibule could cost anywhere from $20,000 to $60,000. In addition, a vestibule becomes ineffective when both entrance doors open simultaneously during heavy traffic periods so as to allow cold outdoor air to penetrate.
Air curtains, which are typically mounted above doorways, separate indoor and outdoor temperatures with a stream of air strategically engineered to strike the floor with a particular velocity and position. The air prevents outdoor air infiltration while also permitting an unobstructed pedestrian entryway. An air curtain for a single six- foot-wide entrance/exit opening is often less than $6,000 plus installation costs. It also helps to block flying insects, dust, wind, cold/warm, and ambient moisture to achieve a better indoor comfort. Furthermore, building entrances equipped with air curtains are believed to be more energy efficient than the entrances with single doors and with vestibules as well. However, an exhaustive literature search reviewed that no previous studies to quantify the impact of building entrance air curtains on whole building energy usage.
OBJECTIVE
The objective of this study is to decide if air curtains can be considered comparable in energy performance to that of buildings with vestibules where they are required by building energy codes and standards in climate zones 3 – 8 by means of whole building annual energy simulations and computational fluid dynamics (CFD) modeling of air curtains. For the climate zones 1 and 2, where vestibules are not required by the codes, this study will also quantify the potential energy savings of air curtains compared to the baseline case of the building entrance without air curtain or vestibule.
RESULTS
The two tasks were divided into the following five sub-tasks.
Task 1 – Air Curtain Infiltration and Exfiltration
The determination of infiltration & exfiltration characteristics of air curtain is the key task. About 350 CFD simulations were conducted to model an air curtain under different settings of outdoor and indoor pressure and temperature differences by using the standard k-ε turbulence model. Both winter and summer operational modes of air curtain were considered. The air curtain jet is supplied with a 20 ̊ angle (outwards as shown in Fig. 1) at 15 m/s and 21 ̊C for the winter mode, and 15 m/s and 24 ̊C for the summer mode. The indoor design temperatures are the same as the air curtain supply temperatures, and the outdoor temperatures varies among -40, -20 and 10 ̊C in the winter mode, and 25, 30, and 40 ̊C in the summer mode. Different door opening angles were also considered including 90 ̊ (fully open), 60 ̊, 30 ̊ and 10 ̊ under the pressure difference (∆P) of -20, -10, -5, 0, 10, 20, 30, and 40 Pa for all the cases and -3.5, -2.5, -1.5, -1, and -0.5 Pa for some cases across the door. Fig.2 shows the three flow scenarios of the air curtain door when the air curtain is in operation compared to the single and vestibule doors during the occupied hours of the building. When the air curtain is not in operation during occupied hours, the air curtain door was modeled as a single door by using CONTAM’s control nodes and schedules. When the building is unoccupied, the building door was assumed to be completely closed and the leakages were zero for the single door, the air curtain door and the vestibule door.

The critical pressure is found to be ∆Plc = -3.3 Pa and ∆Puc = 6.9 Pa. The outflow (negative Q) occurs when ∆P < ∆Puc, and the inflow (positive Q) occurs when ∆P > ∆Puc.
 For the outflow section, there is a sharp increase of flow rate at ∆Plc when the flow switches from “zero infiltration” (Fig. 1a) to “exfiltration” (Fig. 1c) because the indoor air starts to exfiltrate under the air curtain jet as shown in Fig. 1c.
Compared to both single door and vestibule door, air curtain reduces air infiltration significantly under the same pressure difference across the door, especially for mild ranges of pressure difference.
 Air curtain also causes less outflow than the vestibule door for the negative pressure difference of -7.0 < ∆P < 0 Pa but creates more outflow when ∆P < -7.0 Pa. When the pressure difference ∆P < -15 Pa, air curtain could cause more outflow than the single door.
Task 2 – Building Pressure Difference
Pressure difference across building envelope is one of the major driving forces for infiltration/exfiltration. Nine CONTAM simulations were conducted to calculate the annual pressure differences and infiltration/exfiltration rates through the single door, the vestibule door, and the air curtain door for the medium office building with three scenarios of the HVAC system: a baseline supply and return system (hereafter, 100% supply system), a system with 5% less supply than return (95% supply system) or a system with 10% less supply than return (90% supply system). The 100% supply system is provided by NIST for the medium office building in the study of “Airflow and Indoor Air Quality Models of DOE Reference Commercial Buildings” (NIST Technical Note 1734) (Ng et al. 2012). The last two scenarios were created to consider the impact of the depressurization of the building by the HVAC system, which could cause more infiltrations than the baseline system. The door usage is the baseline case of 100 people/hr. The annual whole building analysis is conducted for 8760 hours including both occupied and unoccupied hours, and considering the on/off schedules of the HVAC system.
For the 100% supply system,
o the annually average building pressure difference across the entrance door is 0.8 Pa of a range of -9.5 ~
27.4 Pa with a median value of 0.2 Pa. The pressure difference is mostly -10 ~ 10 Pa.
o compared to the single door, the air curtain door reduces 62% of the annual total air in filtration and 3% of
the total exfiltration, and the vestibule door reduces 23% infiltration and 25% exfiltration.

For the 95% supply system,
o the annually average building pressure difference across the entrance door is 1.3 Pa of a range of -7.9 ~
29.6 Pa with a median value of 0.5 Pa.
o compared to the single door, the air curtain door reduces 65% of the annual total air infiltration and
increases 3% of the total exfiltration, and the vestibule door reduces 23% infiltration and 25% exfiltration; For the 90% supply system,
o the annually average building pressure difference across the entrance door is 1.8 Pa of a range of -6.5 ~ 31.5 Pa with a median value of 0.9 Pa.
o compared to the single door, the air curtain door reduces 67% of the annual total air infiltration and increases 11% of the total exfiltration, and the vestibule door reduces 24% infiltration and 24% exfiltration.
Task 3 – Whole Building Energy Simulation
The energy performance of air curtain is a combination effect of infiltration and exfiltration, which can be evaluated by whole building energy analysis. Nine whole building energy analyses were performed by the coupled TRNSYS and CONTAM model for the single door, the vestibule door, and the air curtain door for both summer and winter modes of Chicago, IL. The parameters in consideration include the baseline door usage frequency of 100 people/hr, the 100% supply, 95% supply and 90% supply systems. The air curtain fan power is 1.05 kW. The air curtain is equipped with temperature control and expected to operate only during the occupied hours, when the door is opened and at the same time the ambient air temperature drops below 10 °C for the winter mode, or increases above 30 °C for the summer mode. The major conclusions are as follows.
          Annual energy saving mostly comes from heating saving.
          Small penalty may occur for the vestibule, since during shoulder seasons the vestibule may block the free cooling from the ambient.
          Air curtain leads to better energy performance than the single door and the vestibule door.
          The annual total heating saving of the air curtain varies 7031 kWh (2.8%) ~ 11406 kWh (4.2%) compared to the single door, and 4383 kWh (1.7%) ~ 7359 kWh (2.8%) compared to the vestibule door.
The reduction of peak heating load by the air curtain varies 28 kW (5.6%) ~ 32 kW (6.2%) compared to the single door, and 18 kW (3.7%) ~ 19 kW (3.8%) compared to the vestibule.
 The reduction of peak cooling load by the air curtain varies 1 kW (0.3%) ~ 2.3 kW (0.8%) compared to the single door, and 0.3 kW (0.1%) ~ 1.3 kW (0.4%) compared to the vestibule.
          The annual air curtain fan energy is 371 kWh.
          Compared to the single door, the annual total energy saving of using air curtain varies 6660 kWh (1.4%) ~ 11085 kWh (2.3%).
Compared to the vestibule door, the annual total energy saving of using air curtain varies 4169 kWh (0.9%) ~ 7205 kWh (1.5%).
 The variation of the savings depends on how well the HVAC system is balanced. When the HVAC system is less balanced thus tending to cause more infiltration, the energy saving of the air curtain becomes better.
Task 4 – Sensitivity analysis
A sensitivity analysis of 72 whole building energy simulations was performed for the single door and the air curtain door for different climates: climate zone 2 (for cooling dominant climate, e.g. Austin), zone 4 (for heating & cooling climate, e.g. Baltimore), and zone 6 (for heating dominant climate, e.g. Minneapolis). The following key parameters are considered: building entrance orientation, building pressures affected by the 100% supply/95% supply/90% supply HVAC systems, door usage frequencies.
For climate zones 2,4 and 6, most of the saving comes from heating, and colder climate enjoys more saving from air curtain.
 All the parameters in the sensitivity analysis are important, the variation of which may cause at least 30% difference in terms of annual heating demand saving compared to the according sensitivity test components.
a. Entrance orientation
Building entrance orientation was evaluated for the north, south, east, and west directions. The door usage frequency is set to be 100 people/hr, and the building HVAC is the 100% supply system. The annual heating saving of the air curtain depends on the dominant wind direction for different cities.
For Austin (climate zone 2), the annual heating saving varies from 328 kWh (0.7%) for the north to 2514 kWh (4.9%) for the south; the annual cooling saving varies from 192 kWh (0%) for the south to 253 kWh (0.1%) for the north, when compared to the single door.
 For Baltimore (climate zone 4), the annual heating saving varies from 497 kWh (0.3%) for the north to 4933 kWh (3.1%) for the west; the annual cooling saving varies from -25 kWh (-0%) for the south to 217 kWh (0.1%) for the north compared to the vestibule.
For Minneapolis (climate zone 6), the annual heating saving varies from 5788 kWh (1.6%) for the north to 9023 kWh (2.5%) for the west; the annual cooling saving varies from 134 kWh (0.1%) for the south to 292 kWh (0.2%) for the north compared to the vestibule.
 The annual air curtain fan energy is 256 kWh for Austin, 331 kWh for Baltimore and 385 kWh for Minneapolis.
The annual total saving of using air curtain varies from 330 kWh to 2449 kWh when compared to the single door in Austin; from 383 kWh to 4709 kWh for Baltimore, and from 5695 kWh to 8822 kWh for Minneapolis when compared to the vestibule door.
 The annual total percentage saving of using air curtain varies from 0 to 0.4% when compared to the single door in Austin, from 0% to 1.1% for Baltimore when compared to the vestibule, and from 1% to 1.5% for Minneapolis when compared to the vestibule.
CONCLUSIONS
In this study, CFD simulations of air infiltration/exfiltration through the air curtain were conducted to obtain the corresponding correlations to be used in the whole building energy analysis of the medium office reference building by the coupled simulation of TRNSYS and CONTAM.
For the modeled medium office building with the 100% supply HVAC system and the door usage frequency of 100 people/hr, the whole building annual energy use when the air curtain is installed is less in all the climate zones modeled: it is less than the single door in the climate zone 1-3, and less than the vestibule door in the climate zone 3-8.
Specifically, the following key conclusions are found.
 The airflow rate through the air curtain can be characterized as the function of pressure difference across the door in three sections: zero infiltration, infiltration and exfiltration. Following Yuill’s method for the single door and the vestibule, the air curtain correlations can be obtained as the function of door usage frequency in people per hour in terms of the discharge coefficients and discharge modifiers, or the flow coefficients and flow modifiers.
 Based on the obtained air curtain correlations, the air curtain is shown to reduce air infiltration significantly under the same conditions when compared to either the single door or the vestibule, whereas it may cause higher exfiltration when the indoor pressure is higher enough than the outdoor pressure (e.g. ∆P < -15 Pa) when compared to the single door.
 The predicted annual pressure difference across the envelope of the modeled building is mostly within -10 ~ 10 Pa with the maximum of about 30 Pa and the minimum of -10 Pa for the case of Chicago, IL.
 The modeled air curtain is shown to provide comparable performance as the modeled vestibule for the climate zone 3 – 8. Compared to the vestibule, the air curtain can save 0.3% ~ 2.2% energy for zone 3 – 8, which corresponds to 1146 kWh ~ 18986 kWh. Better performance will be achieved for colder climate.
 The major saving of the air curtain comes from the heating saving so, although there is saving, the air curtain total saving in zone 1 – 2 is marginal, which is 0% (81 kWh ~ 132 kWh) when compared to the single door.
Building entrance orientation, building pressure, and door usage frequency all affect air infiltration/exfiltration and the resultant energy performance of the air curtain when compared to the single door and the vestibule. Particularly, the effects of building entrance orientation and the balance of the HVAC system cannot be overlooked and they were shown to be as important as door usage frequency.
Based on the results of the modeled building and the air curtain in this study, considering its lower initial cost and space saving benefit, air curtain should be a good alternative to the vestibule for the climate zones of 3 – 8. Note that the results from this study are based on the specific building, the specific parameters and the modeling method of air curtains.
Anderson-Bolds is the Mars Air Representative in Ohio and Kentucky.
216-360-9800




Saturday, March 21, 2015

Mars Air Curtains Replace Vestibules

Mars Air Curtains and Q'Mark Air Doors can replace Vestibules in New Construction


The Air Movement and Control Association International, Inc. (AMCA International) recently announced that air curtains are an approved alternative to vestibules. Following tests with air curtains in accordance with ANSI/AMCA standards and manufacturers' instructions, the 2015 version of the International Energy Conservation Code (IECC) will contain this new provision.

Specifying air curtains as an energy-saving, low-cost alternative to vestibules in new construction has already become a growing trend among engineers and architects. Air curtains work by creating an invisible sheet of air that bends and resists thermal exchange over an opening using the building's internal pressure. Vestibules, on the other hand, often detract from the building's aesthetics, consume valuable floor space and may impede egress in an emergency situation. Unlike vestibules, air curtains have less of a propensity to be negated by common situations, such as high traffic and propped doors, and still minimize the infiltration of airborne contaminants. For this reason, air curtains are approved by the National Sanitation Foundation for use in the food service industry as a means of insect control for customer entry doors, and service entry doors and windows.

Air curtains are now accepted by both the International Green Construction Code (IGCC) and IECC as an alternative to vestibules. The benefit of air curtains over vestibules was so apparent to P.A. Troyer, an architectural firm in Ft. Wayne, IN, that the company campaigned to amend the energy code to add air curtains as an alternative to vestibules at the state level.

In the past, Indiana energy codes required a vestibule, which takes up approximately 50 square feet, in every new building constructed.  This posed a challenge to smaller retailers because it meant the loss of valuable floor space. Many store owners wanted alternate solutions to the code requirements without surrendering precious floor space. P.A. Troyer turned to air curtains as the solution.

"After stepping back and considering the loss of space, the cost of the vestibule, and the inconvenience of going through two doors to enter the store, an air curtain seemed to be a logical choice," said Phil Troyer, architect at P.A. Troyer Inc.  "I was already familiar with air curtains used in grocery stores and drive-up windows to separate environments. After speaking with a local distributor in the area, we decided that an air curtain was the solution to solving the space problem."

Troyer presented the argument to the State of Indiana Planning Committee for six different sites. He was approved by the state for all six locations.  Today, the requirement for a vestibule has been resolved so that an air curtain is acceptable in a space that is less than 3,000 square feet, almost mirroring the IGCC and IECC requirements.

A recent study published by AMCA International evaluated the effectiveness of air curtains and confirmed that when compared to a vestibule, air curtains consistently meet or outperform vestibules in energy savings. The most recent study, Investigation of the Impact of Building Entrance Air Curtain on Whole Building Energy Use1, was conducted by Liangzhu Wang, PhD, assistant professor at the Department of Building, Civil and Environmental Engineering of Concordia University, Montreal, Canada.  Dr. Wang compared the cost effectiveness of an air curtain mounted over a single-entry door versus a vestibule using an approach that integrated three types of modeling software: ANSYS Fluent for the CFD simulation, TRNSYS for the energy modeling, and CONTAM for modeling building air pressure and infiltration.

The study illustrated that whole building annual energy consumption, modeled with the air curtain door, is less in all climate zones when compared to the modeled vestibule door.  The modeled air curtain door can reduce energy consumption by 0.3% to 2.2% in colder climate Zones 3-8, but marginal for Zones 1 and 2, as no changes were made to the operating characteristics of the air curtain. The study also established that the building entrance orientation, frequency of use and the balance of the building HVAC system (pressure) affect air infiltration/exfiltration, and the overall energy performance of the air curtain.

The IECC is published by the International Code Council (www.iccsafe.org), "a member-focused association dedicated to developing model codes and standards used in the design, build and compliance process to construct safe, sustainable, affordable and resilient structures."

By: Frank Cuaderno, vice president of engineering of Mars Air Systems, the international leader in high quality air curtains that help make buildings comfortable, sanitary and energy efficient. With more than 50 years in the business, and utilizing the industry-leading tools and services, Mars provides architects, engineers, food service consultants and other specifies with the most comprehensive air curtain solutions, while giving building owners the peace of mind of a reliable product and dedicated support. For more information, visit www.marsair.com or Anderson-Bolds.

Anderson-Bolds is the Mars Air Representative in Ohio and Kentucky.
216-360-9800

Chrysler AirTemp Compressor parts from RSI Supply

CHRYSLER / AIRTEMP  Semi - Hermetic Compressor Parts from RSI
Models 3020 (20 HP) Thru  3000 (100HP) and 2020 (20HP) Thru 2000(100HP) Open Drive.

ITEM  QTY         P/N             DESCR.                        COST        WGT LBS.
     1        85        2008358    DISC.VALVE ASM.       $140.30          5.0
     2        78        2007170    UNLOADER                  $113.25          1.5
     3        37        2007172    UNLOADER ASM.        $140.00          1.5
     4        51        2008437    BEARING ROUGH        $19.90           1.0
     5       214       2008438    BEARING ROUGH        $19.90           1.0
     6       34         2010897   VALVE PORT PLATE    $15.30           1.0
     7       12         2547252    CYL.LINER ASM.          $50.00           5.0
     8       34        2547253     DISC. VALVE ASM       $144.90         3.0
     9       63        2010884     PISTON & PIN              $16.47           1.5
    10     40         RSK326     END COVER BRG,       $50.00           1.5
    11     24          525504      PUMP BRG                   $38.25           1.0

ITEMS 10 AND 11 are used on WORTHINGTON  MODEL 3VN62 2 STAGE COMPRESSOR NAVY SPECIAL.

Call us for inquiries and orders at 1-800-221-1000
or email Al Switendale at al.rsihvac@gmail.com.
RSI Supply
23 Commerce Rd
Fairfield NJ 07004


http://www.rsisupply.com