s

NATIONAL BUREAU OF STANDARDS REPORT

f NBS PROJECT NBS REPORT

1003-20-4838 Jtily 21, 195^ 3^70

PROGRESS REPORT ON ENGINE AIR CLEANERS

by

Carl W* Coblentz

Heating and Air Conditioning Section

Building Technology Division

to

Office of the Chief of Transportation

Dejartanent of "ttae Arji^y

<^BS>

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

The publication, rep

unless permission is 25.D.C, Such perr

cally prepared If th

Approved for public release by the "

Director of the National Institute of

)orf has been speclfi- Standards and Technology (NIST)

on October 9, 20 1 5.
/* ' V
wmsmaa mws m aib cismis^

A tboa'Qugb Of %he "iwAlio«tl«no to the

> --a" VMU‘ oi aostaiticm eiaginoo du£» to ^buit in the Inti^ alx saata/veA tbftt

particXM of 10 to 8;^ a&&iepgm Olao couesd tho amt Oaxaags p^i

mXt V8l#t<

A.

' -fi It ojppimrs pzvlmble ti»t » p&rconta^ of th» smaller

CiSSNlS ;V^

. , _. of tbe Oust» nsy pass tl» convontloml *1^’ aloamrs csus® esc*

<;sssive veor of lislia^ter englnss* IMS aonsidsmtiosi indicated

the nseessltor to investi^te not only tjse ovofall officieaxsy of t^

.-i mix. clesaners tut the aove.ml seps^mte in mr-iOM Sast

- 4 - .A-O' StrSrBlO©^

^ site ranges* ^:&“

DiB>le 1 is a susascry of the ;^‘oports of 19 Oi^^gine air' cleanertesta mi^ at '^le .Detroit Ai'senal and i?oo@ived ASOA. Of

these 19 clssnsrs onjy t passed the acesi>'tsm.4.Ns SQpsciiricmtioris^ and

all bat did' pass the .ro^^iUiod offiaisiiey test* All other filters

fSlXed to smt either tSu» oofacity or the restriotior. lo^rcsaents.

0BO air cleaasr^ "Code A»6^ ms lOund to have a hi# restriction

to air flov thst no foxthar tests mi's sade of this igp^aiaieri. Ihe

afficlencies mrtod froa 95*^^ to 99«^j 97^ --^ the sirdisim

efficiency is^xlred for t2^te tests^ sad it is fslt that a tetter

f. difftrentiatioa is desirable than the • £^> total mriation ng;)oxted

OR all the mrlsiks models* '''
aXA mo® BO TSW8C , ,, M of siBlaJto^2»« 0mUmU^ t© n©Ji#^«ma xignoxoci# A

hmca$ h±m ssii* «i»tlj^ 3©£ta*#efc»&

^ law

'{«<{ iaoK lHM&»> «oiji

^ ^

01

^ mXoU^jiq J'SciA

ftWa^awMi »^w»q«o #I

$si^m SM&»

^

1» isttit#-5.e« .a«wa * iAttO

«*» s«»«> Aaa ‘tiui wJ#

^ ^

*s^»i.«fe£«se^> «M2? i*Jh|cw>K*d

^ «vi»Md

a^ Ibo XiUrs^ i6i;a® 4N» of M

swab mml'-yjm &k «» ^wrf •‘SAtsaals

^

aslA

-ieaifc£i^^ AoJUfisi® ^ ^ T«w* » •! X

to *AITO^ Aa« XttGKmA .JJteh^ «» $m'9bm sS9^

hm ^moltmi^ko9na^ swtaafrqe&swii ««ftf iiewAq ifiXao W'imsml^ ^ tmsdS

Wivshu ^jomt Uk •^3W# ^aateiam® AtOj^j «rt^ a«A5 AXA 4 XX#

t fsfikt^©jb&J#ts^ wia “SO oO A#XlAt

aakt^^Ottm etnJtd m Ototm mM toi^S AA »AttD ^xpomln -Jtl# ms^

«j£S .a«Edts»^ aJUtt- to aAoo rao wOmtOf^ "odS^ oat ocXl iXo oX

fsttcOoiia «tf# iioj iST® os aupn Aotr^r? «®XoaoX3nio

BSa^SJUitd St ,biaeS mtaSS urt im^tupm va^otomo

aoUJ^xm XMwf ^ • wSU^ o»» *£i£oxl»ol» ol ia>fcrot^ao««rtmA

,wLsbem mjoXw 9dS JJjs a>
2

• ,-»•;• '.-' " • .i c'^-j .T,, V i. 4

•

^ , , ,

, ., Sujwfci-y or y# S. Ajfajy 5fe»1» m.

BS » eiaaewr*

mm

m

C0db& A«^X m

'"ISO ^

v-Aii -1 vv.?-;.;

ZjO

accept!®®

Code A*$

" A-6

A«10 S>TM jj ‘4

to vo*^ fei# ;c«-

' ©trletlaCi co further

^ to«t« wei-o iBBde

‘ ' l^p?riOeiitRl lasd^X

SSjiperlB»ntol

node! 95 *7* • • -

<1/ :;r HO

A*^

* A-3X 97.S2 tso Ok 00

9^-^*9X*^ Gk .. , m . ... tio

9T'*3T ok ok eu?<i;oa>tad

A-33 96.96

'-•»r:: . '.^::r - -i rz: ilQ ok « •'« HO

' *• ' <

« A*3^ . , 96.04* ok CO

-.*.V‘ » A-36 S7»o .

. V*" -su :: £10

..-V-'-; '‘"':- ;.-<. .. i».. CO

M A"^*Z

: 4v V ; wS&i'W ?? UQ

«?S?5S7<-- CO

.f

tt A»5'+ 9Ba CO . .. . ./**

’£'?"v]*

' V-; 00

* did not neet roqulswawito
- s -

mr- ... . X

e«^-

^ ^ ^ f. :‘^-J‘ iSmp'Wff^ A^' m wMlt iffik ^

JS^1» t^mim

4

'}

.MX

«

I

- ", »V.

> .j ' 1

4l^Pr- X^A «(&00

•^'

%i^y

w

V <»® ^

mrnm^

j%M 't^m

^

w^hMt oa «£seX#9l^e^

«»j|fl» ®#«»?

ii^m ^#

$-A •

*»n:s^i5S^ ^

£5X«A

**

%> 4MW^r ^

ik }

'^^

m

* vZ te #|.- 4a‘ m* *i

^A

aa j6# •» m <w , ib

i$SW' »4 iS*}4' 0bi^A «

'.*

(yy lA[^ SB* *v

,K .sfev^ . mm A^A .••^a

•'

«; AM Att «a .

.('iativ 'i ‘5.,. C^ 1

n ^

j«

3e- 36S!g.k?.'3tM «*1»" 5f'.r 'M •

m-Mrnrm^ X0M ^ m0 m>^ <>£ « «i» ^ Oil - «B 0b “• ''

9^imKi&x.fMtm S9m tfoa AiA
«* 3

Tb» diet«rKlaatl<Ki of tbe i» th««o tests M&& l»sed

.w^83'i " ;, '':? •...'^-. &a tim assuaj^tlon sOl 4ust fftm»ing tbs flXtsr -»ss /:ot4i,lrffrd in

a flaxmX cjLo^^'lQStsllsd dou&strssm tibat the i«oi#t istcrsase

^

this cloth, dHed 'imtom said after test, the

wsl^t of the esca^ied ^ost. the emluatioe of this Si&thod

’ is 'i^ry si%ls it 'has two setbaoksi

i* it s^pi^esj^s t^t the riemel cloth viH xotain

a hi# of aoall dust particles* hi# elticishcy of

' oil«lai»ihiiaest clsassere lai'ie sloe pai^^ticles s^goars conooix^

' 1!herefOire'~^ if ’11:^ so-^salled #80342te jpasses a portioa^ of

• V- -Xtev .: 9n«i'' -ivi C;i' ''

'

' the asifcll particles, th^ the wi#t retaimd there is m loa^r

dleative fez* the ssouzit of dust that passed the clearer*

^. ' -%yM f>^:-\‘g' :< •!•- ^' '•*' - - ^'' . vrf- -- S« 1!lie hez^itig aod i«ei#icg of the filter cloth of up to 30

<4 - >?. , . -r--

'-^'' '

3.'- ' V- --5

f' •' * ihcl^ diaeniter mty <smim J£>m of a certain mcmit of dost tdiich

also ter4S to' d^tort results*

ifroposed ^Ssmt %thad

Based on th«.Se r&servatioic^ it is piti^posed that three diffemrt

msd iodepehdent snthods #aXl be uji^ to fieteiisiQe the air elsaaer

^PHaimoy* ' 1hese''ita8thods my be laodlfied, later, as e»^ri^ce is

{pined, and dm or the other my be conpletely deleted*

i# Hie owmll sfficieasy will be dete'xsdned hy dreasin^ under

nditl^ a flroaU flow of air fron downstx'ees the cleaaej:^

'.?/• Hiiou# 0*3 iflicrooi'^^asa fibre paper, wltich retains particles

*'V>. isObiZMStlc

above the site of tSse fibre
i

• c

-

ol i^eW* %o «®P

eUl *sasl»>»i ma» ‘wtXn «» *««* JU» *5ii» aaii^SMWMl «» ao

iswwia

aljt^

^ i*s£# «k^ '2»» '>aK W

-Ki. Wtf' M. 8i^s«Baa T-ia-r »£ ,••,•

£jm7MCt

^

it *1

3?8i.«&j34*sa!K SS^'^S4lX '‘*@>1

4» aa&«<^ vB^J^ s*St' ^#*jeo<5»^<i^'

«^j|::i*iE^^|^^|. <!!3ss ai' .Sasjsifci^'-i ls%Sw «i# ^sss^ Xiao# ww

mMmiP

Qt

^ ’2« 511^X1^ S^ 'ia a<ai“4|^«w

^

BCl.C^c*l ««£? »i . .. .

s(»ftS» »B ^»Ki» aianao * *i« a»a£ a® s«w» its® ta*fiia»i» »«Ssm

^'’ '''

ta^X&aMTJi nh>so$ ©al»

-rk: -f*—^J.- ^r

4»">s ;^mz9Vik& rnrm ^immn ^ ?»^.t so ^»«ae

zmmli» tjui

^ Ib^ »S -Uoete #i>6«iStNB 4'ias6ae<i^Ji iwo

al ©»3©i*n£«»fi» «a ^x%Um ^

3ft««0»»

'^. ‘ — y^ktifJ9Tjti l)®(cifiip-4ii(!i^'li> ®®f IXIw ij|^.aIs>’I^XaR ilflnwvo #iff al

tfiCMjaX© w^i «wa»7i^iR»iofe laO'sTt tio ''ia aol'i iiJiB# « «K<i^i2iwop sl^wiisfiD#!

li» »aw«« ^tmm mttt tmJ& 0W9» S.O *»«««»»

acitf ”ia -«?i*l4i ^diSr
^ it • viH ^

cln8«iri@d in tmr nim 'by vm&

of ft Cftftcade Is^pftctcr* % tJb® air xspstrsm iSamrntrmsa.

the filter th« nuuftxtr of 4a®t pfti-*ticle« of eoch four «lfl»

atiL he detenalned for a imown TnOlitzas of air, by <?ountis^,

3. 'She IhUlVPrlOB ®a»t a^ot te«ter shall hs iwed to

the dtffftrenee of the cotitcerstxatiosi upstreasi suid the

filter by Taeans Of the dlacolomtiosi' lart^iod.

tvhais u«lii|‘ dust of •yse se8?e toai'^ "the ^ri»etrlc:ftlly date);--

mined effleltey''iilll he related to'^tfee cubes ""of the diftieters'of

ttoe'^'^au^ partliiles idiersea

^

dlaeoloi-atlor* aetisod refers to th»

of the duat particles* It is plmmed to <3^-tals

0f these tvo isethods by me^m of dust count fresn the Caaced^ i^gact&x-.

The test apparatus heing set up Is designed to test air alaane^iB

fwr ex^nes as snail as 50 H* to the B«*lB30 iiitb 1^)0 H« f • and

to handle a pressure drop across the air clueemr of to 2^ in 0«

The dust feed m» designed to supply dust at a cmstant ^ate

from 10 lag to 35 Mg per au. it* of air at any desl^.’od air flow iste*

The use of three dix^rent dusts for the first series of tests is

conteeq^ted, ^isasly A* C* ^^rkplug Co. 'dusts and **fine”

Bxd Cottrell px^ipltate.

All test eq^pment ItMt been ordered a^d the oallbratlon

of the «ppa.-&baB is about to be ooDsaenced. Frovided all testine

eqpudpfaent vlll be on hand as scheduled preliMimxy tests can be

started early in August.
^ -

saisi iSiQlX jaU wf Xtlw «® *S

£aa«ra«<jwol) ib«> a ‘So

a^«ar. ©^e ‘:^AKa i^cJaiss ad4 -rotm 8f<St

liijaB» <?4 4;X«^. •>.»sJiW!^’ 4^ »ST 4

SK^ lis«o s?4# «<Jtf

oik^

, r^-^jE«sfiaS^ «wi«p Xi^. igaca^a^ l^swX#

t^OE^, S^m stmrG^ «4#

U $l *«s»Xa4f^J6iQ 4m^ ®4r

^

”i« ««3ww ^ aiisoi^^oa

^

S‘5«»tf®Xa» sX* 4m4 m4 »sa«rf efff

&s» ,t !! mi ^13? OSaX^ M I. 0| ,«0 Xl^ »» ^X3<» ..4 - • r ,0 ai 4JS «M 'So \»fis*al«> -sXii cobwiao ferai^ ro«W^ » ®0»*i

tttfari ^«Bt*aoo ff» _««? W »e®

«©n %XB sy»xMi^^ $» 'OA lEo *n_ jfQ m ^ >94 mj^ »tn%

_ «£ 9ir»&? ito m 94m^ ^iwmnXJ^ esraaid- ^

«w» «iS

AfSM ’"so^AOO** «#eol> #S #A j^Xaaaa

.. t,«.

**

mUmiiSUm mS4 to .yiw»^tm>»J^' tox«a^ xxi

*< <

' '.4 v- - V* S«M»»# a« 6«Mw!S! -»9<waiBB6o Wf «* '*»»»,« rnoa-rn^. •& te

ittf SM^ >p(«AaJUKSXvii4 *M ^EUli 4K) ftcT XXtV j^iWBgt^gMi

»«ssjiQ^ oi >(to»
«• 5 »»

At pxmwmxt, tests HLffe belag csaaluictod m a mvl^ designed

rotating flltsi'* A pilot aodel this filter oliossd efflcslsncles

In sxcsss of 90^ Khsn nslng tbs flm QottreH dnst» IMs

flltdr is designed as a pra-filtar for oil-bath cleaners and is

eaq^cted to be sugperlor to «ynion type fUtar in both efficiency

asd flew resistence.

Aa early coejfersice with representatives of the Office of Uie

CSilef of Tmaa^rtAtim, 0. $• Ax«^, wiU b® wel-so^ t©

mlues (tesirsble flow resistance^ t^ast bolding

physic siae or the air eXsaner^ etc*
yj'

,'.jr'i'“

I

« r

MtsKMiam* irnim wtttS «t)i> » 4#«b *»«« *a«»*«

»n«--.,*s«e- ,..*«» •*®?**.?*

ta rnfiim «K^

^ twMMsitMMgp., Htpl. ^fsm b*,^^

' "

-; ;7- SS ^iwjl- mnp^

>% >^' %/-n?^fe(gsi^C);j' 'ia^-f ^ Jd^^^njuf ^

'''-'

:.i^ ^

>i.^ . - ' '

, ; ;, V.-. - ^

J.t., . . V- ’"m'pm ,;=S'^

*-)t5

*/ i<^ *

££v<*^-

L

fn

*

k «