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NATIONAL BUREAU OF STANDARDS REPORT

NBS PROJECT NBS REPORT

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

The publication

unless permlssi( 25,D,C, Such

cally prepared

Approved for public release by the

Director of the National Institute of

Standards and Technology (NIST)

on October 9, 2015.

I or In pait, Is prohibited

f Standards, Washington

a report has been speclflir report for Its own use.

50

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^
T>eces;'b9r 1, 1933 - 31, 19%

1. lff1;Rr^r.tiCTTr'

?hi» report umraarlaea acttvitiets of the iieatim* larid Air

Conditioning: ciecftion, Building Technoloi^y Uivision, ^atlorial

of -^tanQ»rdSj in behalf of the h-ecbjinio^il ^:m;ineering

division, Beadquartere, :!«arte»ast«r 'General -i^mmrch and

revelopEiont Coms&and, U. ,,S* this report covers a

p^:‘rim!, of isonths, 'it has bean proposed and between KBS and "Wt E I'i that future” pro^re-s'.?. reports will

cover period# i3o ^Toater than' ©ne^quarter year*

Th® aervieoa of fotirteen isemhera of the ataff of theBeating and Air Conditioning -.^otioE and specialised facilities of that ^mip located in six bi?i.ldlngig at the f^etlonaX

Bureau of ^^tandards have been direetly otiSlsed m required • to further th® work reported# The services and facilities

of other sections at KB3 have boen dr^m on as required# "he

principal activities on this pro^mm &re itemised below, together with a discussion of 'tfee progress during the pre:^ent

report-iiif; period or their status mt the end of the reporting

period#

itofe: 1# mvicda tnmms^ mfont

^*'^*A* Eeport ho. 2956, cowring activities? in the p^^riod

fro® July 1 through hov^^ber 30,1953 wa« subasltted on Decesbor

A, 3953*

2# .haiFii.i2 imrm^ mH

The final report Keport ho# 30,5?* entitled *^horfors^ance of Erl frees rrier© in a Freon-12 H«frl^<irj^tin?? ;-:ya-. t«&,” was submitted on January 15, 1954. it covered results

of t«8v® and investigations ®ade of a proprietary device for

removlriij moisture frop. a refri >*«rating syataia, asanufactured

by the Bema ^wporatlon, '-’Ichgiond Hill, hew York, and marketed uniler the tr-ade cuvse ^^tJrifreea .hehydr^itor,"’ CelciuiB

Car'bide was employed m the desiccant faaterial arid the teat

program was arran<5«d to detemine characteristics in three

aspects;

1. brylng tests

2. MmrdB

3# “assistance to vibration
mA to 2rcst

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An of l'rlfr©«£ -.rier is contaimd o« 39 of

report ??o. 3057 referred to fibore* ;

It erf. 1.

T«sr?t3 vor© coraplofcod in tho last report period of t>’e

prototype radial c--:iT;prer.jjor*

final report," HB-i Report tio* 3341| entitled ^valori®eter t^sts

of a Prototype 1/2 HP F^lve-Ciylinder l^adlal was

s«b?tltted on 11, 1954*

this Oo^pressor appeared to have potential ¥alue beoau«e

of Its’lii^t weight and sRall si«e* Undesirable oharaoteristlcs were his-h power conTOEiptiioii, porosity of th® casing, and

vibration.

if’,. -

’

iteir u, 1/2 rm Pim^m% mi?

'fbe previous prog:ress report presented the essential results observed free tests of a I -IO fhttrmo ^In.^ nlugtype g»s engine driven refri .aerating mit Ts^en ererated over

& rah^e of spoeds. ,

A first, dr3^ft of the final report of these tests has been

ccffiploted* ^ ";

Tl,e objeot-lve Of these tents ms' to deterndne the practic^sl

rang-e of oapiEcities for 10*F and 35*7 refrii^erator te^paratores

at an aasbiont teasperatwre of 110*^ F obtainable by vary!n^r the

operative speed of the ms engine* '.?he oondenaer and evaporator

fans v;«re I'^et coairolled at a cooftaat spe^d for the range of

teots but were operated at speed?? proportional to the ^asoltne

eu^-ine by the belt drive lncorporat.^d in unit*

It figs 5, 1/3 bHlT, ( :X^}

k T1. 0r£iO Elr4^ hodel ^4, 15 pi tig-type gasoline driven refrigerating unit was? tasted mder conditions as renerally

referei-ced m-:’er discussion of' th^ 1/2 tor unit* (Item 4. of

this progress report)*’ ' Fan 3?peeds were sfiaintalned constant

at each of two valtiea while engine speeds (and compressor

were varied over a considerable range for one series of t^sts

and 'were operated proportional to 'ipeed char^^es by i. e^ms

of the belt drive for another *»cries of tests.

17;e increase in net refrl ;«?rating capacity as cof»!r^ared to

proportional speeds was algriifiC'aJifc and has been reported *revioualy. A decision to curtail further ‘^uch invusti^'ation oi

this particular unit in this rejffird waa made and the fi.nal report of this worV is nearin-- completion.

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compl^^ea pr^vloua to tbls re- ortic?t perio<5 of

a *.iJ5g 1/3 toa plu.,:^tyne l':,od©l 1. 13 «l«'C*trie wsotor

firiv-aa r0frijr,er4iting iiait md. approxi^^ate capac5ti®a at auibiaat teisteratisres of 70®F, 90* ? , llO^F and 125*^1 and at refri«r#ration toiEn^raturos of lO*"?* 35*"^' lowoat obtainable for each ambient.

Tl-.e ca. aclty ran4ja<J fro«J 9700 BTUAj^* at 35*1 refrigsmtor

te^tper^^tyro and 70*F asibiost tojtperafcure to 2400 BTU/hr at

refrigerator and ?D*F aiiblent* At 110*F a®^.blent ters^-

eraturd the capacity ri^ngcd frote 2900 B?t-/br at 2.5*F‘ refri;r^rator ta®pi^ratJire to 6750 BTtJ/br at 35®F refrigerator ter*r®rs.-

t!3re.

^ final report will fee ;sub?s.ltL-eti on this s^eries of tef.ta.

Item 7. , 1/3 ?o^ tiuc-Tir^, ma.T |c/;rh..,i: 'U

Jx 1/3 ton gasoline engine , drIvon pliag-type r©fri;.:eratin^

uTiit itanufact^red by Carrier Corp..wa@ tested prior to tils

r«^perting period to determine capacity at ambient feosiperatures

of 70*F, 90*F, 110*f and 125*F and. at refrigerator tosperatures

of O^F, 35*^ and lowest obtainable In the test 'mmhouQe, wfeserved c&pacilles .ran:':ed fro® 2100 STC/hr at 70*'F amMent temperature and-23*F, rcfri|;:erato.r twartture to 10,300 BTl^/hr at

70*F assbient tp-sperature md 35*7 refrigerator teisperatwre* -.t ll0*F ambient t-eir^perature the capacity ran^^d 2750 BTt/hr

at -10* F refrlforator teasperatiura to f750 ImJ/hr at 35*h refrigerator tsmp-eriiture.

g final report on this iseries of t®gte will i.-e aub;i5ltted.

•-i Itei^ g!. 1^,000 Iitt/hr,.^i.-CTIOhhl, , XR G€hi.:i, iPi'::;'; of a prototype sectional 2 hr electric motor dr.lv@n

air eonditloninp'r unit desli^ned for use %dth Ys«m type trailers

and .mamifactored by General hJactric Co&psny v/ere completed

orior to this reporting period, t'.ring the p«.rlod of ' test.ln.^''

difficulty wiis experienced *^lth flexible lines, excessive ..ir

leakage and r®frlg«r^i,nt control, '^he te$titi?i ws$ held In

afeeysnce pending « decision by the manufacturer to modify the

unit. Before anythl.ng was dene In thia regard, fr. R.

'•'tiles, of indicated that no further teats be made,

final rcT^ort of this t«>at series thas was coj«pleted will be

^.ub^itted. 'Vh@se tests included opr/rat^ior. with the entire

unit within the eondltioned space, the entire -init outride the

conditioned space ana with the i^nlt divided, i.c. with ;.-he Cvondsnslng unit outsi^'e and the evapor.';tor unit with in t* e conditioned «p«ce*

iMs unit was sJf'il^'r to, bnt ^:!mailrr thai*, ^'...o 3 gv

prototype sectional van tyte air conhltlorln'^ units, one ranu-
r

“to J .•;.i»iif4>“x^ Jb#vdlqj«c«>

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Corp,, tested during the saaie period for tVe Office of the

Corps of Soiiiineers , fort BeXvoir,

Tter^ 9 . iin tfXsniBmon ju iisf‘wtnKtz^ mAnj:2S:

Ko work done on this project during this reportin?!:

period# 'tl^e trailer hs^s ' been equipped with thonsocourles and

the type of air flow sisa«ur.ing' devices to b€ u;?ed ,Iiav*e been

selected* i ai?aulated food load consl^^tin* of 1*1 cii* ft*

cases of eo®bat food rations has been placed in the trjiiler

and the trailer has been Instoll^-d In a teet ar#a suitafclc for

the tests proposed* %rk can be resated, at any tin:©*

Itfir 10* .TEHT HUTSif, ripD

In extended serSea of of various eoispanents of three

fasoline fired tent hosterd were essentially cosjpleted prior

to this reporting period and eQ^t of t>e information requested

has beer relayed to interei?ted repra.?enti,tivc3 of fho

final report for this mrim of ia nstirly completed*

kneh of this work centered around the used to .tove

the beat.-ing air through the hcatar assembly and iucladed mch

ittJBS os position of the fame 5.,n the shrouds, pressure 'Grop

through the beater, coiapari son of oomp^ .fans, eairo-'

ration of test ducts, calibrutio,n of tsoasuriui; elements, as well as dtterminlnf?, air s^ovlna ability and- horse

requirements of these vrtrious fans*

Ttem n. .fS2»^E0iTI^a ClhGUC’:^J3fIC3 1-TCi UT’iT

This project was instituted prior to this rsportin^: period to determine the cfear&ctsristlcs of ttee present oefro sting

arrangc3:snt of the thermo hir^ !^odel 51 g-^ sol ine driven

warehouse refrigerating us;it ao tH^^t .direct co.itp»ri.son could

ba laade vvlth proposed .modi.ficat ions of this system*

'erk was Guispleted earl.i^?r on ..the first phase of t'-G^e

tests, with an empty 600 cu. ft. prefabricated warehouse used

as 4 calorimeter# The second phase, with a simulated loud

consisting of I.l cu* ft* casus of combat rations, was corn- pi et.»c duriag.this reporting period.

As was expected, there was less t-empGrature r.:se within

the ^var*hou.^5e during dcfrosiiiv:, and the time required for fro

to accumulate to the extent :.hut the warsheuse could not be

held at 0” * was increased*

Theae results - ill be reported as a basis for coiaparlfton

with future results in cvefro’^ting of the modified 1-ton unit*
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rs<4t*'. *••»? la 7‘ ifS'-’y^l.(*'-' 0* ».-?.Cx/>*?»'^
,mn 12. EI.K0TH1C Uul^V^EiK;!^ i-0^ l-Torf HAkmAy.^c IHuT

Tfs© 51 1‘hfiTmoi Einr g>j.6olin« en;-’i»e driven unit

ref©renc©r’ in Iter, il was convertffd to electric imtor drive by

raeans of a canvorsiou kit inainjuTactured for this pur|?o??« by

IK d, Control Cotspmy» It pre .turned that this eonversion was deai^^^ned to proc'uo® capacity equivalent to the r»a»- oline eri?^ine drive* The eo&ipresj3or operated at 2400 rpmdesi(js speed vinder gas engine ’ drive but the electric convoraiori

drive op©rated it at 1750 rpm* fehile ihla prevented direct

comparison, ssignlf.leant op<&ratir4g data was ^’.erlved fro® tr,eae

testiS*' It is probable that the results of these t-dJl be

reported in conjunction with oth^r ^ork currently in ,pro^fr^ss

concerning tht edification of the l^odel 51 fher©o* Kii'i((£ wnit*

Item 13* ES7?IRd^ 0mE (l-TOM R£FElil:vaAtIMO mif)

*i’’ork being done under this It^ can also te® Identified as

riiodificfition of the 1-ton f,aa engine pliif-type Vfarshouse refrigerating imit* ''rhree hodel K...- 51 ^hor^o Ting tmits aro currently

at BBS in connection with this work* th® first unit, ••erlal

lio# -IS. 200 101-53) shipped frosa Colur^bud lepot in 1953

1

the second, Serial Bo* 196 C'hB3 10^-54) was also shipped xrom

Colmbua -Depot , but in 1954 1 and the third, :-©riaI ^o* 199 fhc ^ 110-54) was received froiis S* T^^rdley Ss^ith of B-mItlr=or@, Kd*

'he first unit {BB3 101-53) the one which has been converted to electric asotor drlvo uik! which was used ir* the defrosting studies* The second CiS.l 101^-54) is currently 'beiafjg

tused in the rodifi cation st:w!i®si# The third imtt ha® apparently

not bees opcr:’ted It was originally packed for ship2i«Rt

by the factory*

*'ork Is currfsntly In nrogrese os modification of who second unit 101^-54) along, linens outlined by the fefrl .aravion

Hquipjscmt Brands. A prototype heat e^xeban .'.er was fabricated

and tested to deterMs® feasibility of ejttracting waste heat

from the gas engine exhmuagt and intx’odueing it in the x'ofrigerant circuit as a aourc® of hm% for either defre-sting of the

refrigerated coils or heating of the refriger?ited apace. ‘.^:e results of these prelljalsary tests were reported in a letter

t-o fr. David I, 'Fiske d.ated July 30, 1954*

The co»r5onent® and installation outlined by the Eefri.r-eration Equipment Branch at a betv.^-^en group and

representatives of the .eating and .-'-ir v^ondltlonlng ’ection,

et ICatlcky Bass., on >:ay 6, 1954, (reported as Itesi 14.1

have been Installed and ter^ts are currently in r>ro,?rre.'>s. i'he

results will be transaitted as tbi« work rrorresse^.
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av&IuruIob of U:e propo««d .• or rl .'.n/, t.if'Xtiic

eonr-Tois «Bd autoff-atic i rovii.H.nf ttuto:.;«cic cr • ^rci

for control of both cooIic". &r-d ag nno i<;ftcts;v (or

resuJt-nt) control of engine sf ^oc- a« rvife&ti© of C'Apacity .o4*

ulatior* for both cooling and hearing in cwrreotly in ^ro- ress,

c*uo of the areas requiring cc:sid ©ration outilrted iii a

letter to Con tiittlosae/ Cone 1€, 1954*

^ith v^’rySng -engine coupled aitt ce»apiot® unici-xlii^^ ri;

the ©oa.pressor at conditions requiring neither Veatir./. ..<r chiding sr-o^^m proisds®* Vbis iTivestiiJiaoion is heir;: coxit ir-ue-- *

14-« td&fc'fl’i'iU iiT i'i J

t ai 6j

; r. P^» -* Pill, Chief, >« *:-* hcbenbacl, .nss*t whiel, and

*. ihlliipe, y®ch. Lngr# of the iicating -und .^ir C-ontlit losing

deefcion, Jd38 «et with Ir. •'«l#ch t, •diittlecey, Chief, Refrigeration F.quipaient ''-ranch, I ilitary ri arming I.dvlsion, , 1 St B CofiiR’and end others of Ms organisation at their offices

Sit 1-a.tick, -f -iss., on l-my 6, 1954* e general of tie

meetlri? v^eret

1* ’ renentntlon of ooellng, defrost and f eating requiremantf

2* ‘•'resentatlon of Veardley -fslth’s report on defrost •: n

t^.ethods*

3* i roiTientfotlor' af ... propoa«il for C:iclo leitin

1, ;.eeotiaiendativ>fie for pro^rat; t*t ,

5» Cstablishaeist of- target dates .for coapietion.

3 t- 1 * !.• ;.... ..A. . j, i ,C I, 4 J,-w .:-» i. j 1 C , ( i-.oi’ri •; orators, .electric, .^elf-tontained)

dork hav«i cr^ntinuvfd on chc revision of .fader : 1 ^ 1 ;»©c5 fu catic.-

n.A-l-2ilc { fc •^.iVigeratore, electric, f. elf- sen ta i ned ) • T-ao llelc:

trips by rep.r« sentat i-ve» of h 1. 9, liiJl nnc ublic loctiing ..dAinistration wre ssiade. Hie easential pwrpoae of theso ' trips

war. to »eok out the lirset opinions of r-ev^sr I tanaf^cturar-s of

refrivf.erators in regard to c- "Xf-nt and pror-o.'V.-d tre la the

products! covered by tr 6 e -bjoct f?rjffCif.lcf.ticru irao^nt ti-iuKinf'

is" that the domestic, or hn.>,fM?}.;oir-t 5

' e, refri f“r..-t::-r3, up to

and Ineludlnu 15 cubic feet, sr oul •." te ccv*»red by u ‘.'©r.u.r.^'. e

specif Ication fro«p. the cotii'^;orci.oi or ia^ui tutionul-ty refri^-

erutora v'.'ldcl ntru;:e up- to iOO cuvi.c Iv.t-.t* i-ccordi^^ly

,

factureri^ via It ad tc w'crc ooujiawL.t«Hi primarily in re,.>rd

to the domeiSaic vefri:-.«sratorrj« a*; .ifact, or-m-d Visited uxiriti'z

the two tripn were - =^.^1 :? rj -.rid.riiro, =-rt3ley, ^nv.crnutlonal larve te.-, .d:.^.^&}. , i.nu '^f.ural lU'^'str^c, of

these conferor cf?6 are curroivtly wetuq r-nurd'in-i’.f d with '^'^Ir-r recoraiBendstlor-

nu u.f 1 1;.® n;uT v :) hr re - .lwed 5.:; the
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df>ttr?iiiriSitlon of ^ satisfactory te^sp^r^ture level for the freeser

co!?:part.?uent in a domeetic refrliberator, cossspanles, eatinghouse end have offered to saEsple® of current

lt«iJ3 for atudy. An T cubic foot fri^lhalre ’’CyclotiWitic'’ (selfdefroeting) refrigerator ha^ bmn received and i» currently being

tested tii- cieteroine the degre® to which existlug S\,.i,A» sjid Uc,

;.?tari<iardfi for ratini^ and testing hou:-j®hold refrigerators sr>oyid

be referr«<5 to or 4ncorpar>it#d into the proposed revision,

A f.©feior?a'iduia mvm»rating the or parts of ifedtsral

„>peclfiaation which ne^d i^difloation or wTvich el^ouid

be added to the present draft was prepared at a sneeting July

12, 19*51, at MBS between represeBtatives of the heating and

Condi tier ini;; •ection, KBd and ii.r* J* f* t^avlds©rii|, A@cb, wfig* of

the'^l^efrlgeratioti Iqulpisent Branch j EQ, Cb% H 4 n Corwand in

charge of Uftia project. A copy of this K»e&.orandufii i;# attached

^’lans have ,-been fi^aoe for l-r. l^vldeon .^rtd C. A, . hiHips

to Kioet with hr. Freak Reinhardt, Chiefs Ori'anic ilaatica

Section, livlslon of Crganl© and Fibrous i’^-aterials, on *iUfust 5, 1954 to outline the grethed of proviolng for the use of

acceptable plastics in certain parts of refrigerator construction.

Iten 16. m^El HSO n.m.Q KIKG

On request of Fr. ;#jittlosey, assistance waa rendered to

a reprev^entative of the patent Section, C-.M in regard to the

1/3-ton fos engine driven plug-type warefcouse s*efri derating,

manufactured by H. S. 't’henr^© Contr^^l Company, Finilft’apoli®, • inn-

©ecta and eeiploying a combination starter-generator In connection with the gas engine, rescriptive Inforsati an and photoiraphs were furnished m reqnest#d.

Files of the heating and Air uendltloning Section coalin'

wi.th various items of portable gas engine driven units manufactured. by y. S. Xhers'iO Control vompany, and tested for C..F-\0

by this section for th.e past ton years were prepared for quick

refer nee in response to a request of F.r. J. •' * Cillard, thief,

fech&snicai ^engineering t>:‘. vision, 11., H, h 4 D C-os?m..and in

ccimection »sflth hearings belnp held in ••asJ^lnPton reletlve to

i.he cosibination starter-generator.

Iteiv 17. ROTAtABi.g dlFUiTAfRCito HhAf aHl- OR TK^hytbt,

A program:, for tb© continuation of the studies of water

vapor tr&namiasion in refrigerated wai-ehouaes was prersred and

approved during this period* T- e insulate<ri panel required for

this pro r«Ki was constructed at the hatick Laboratory cf l

, BAD and shipped to tils ureau. i* is panel is currently

being inctslled in the rotatable arparatuij for of water

vapor i'.oveaent in Its cons«truction.
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ti«w iBvert«<! ’fa»oHt[<p^1aifttf*'rn si?rv1c«a and anandard ^nsy gaaolifi«f l&nt«rr»ha^ te«en worked

OMt coo«?<ir«.tilon ^.th repr«8#nt®tiY^-’S ,of the R-ft ' .

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df /kS^dllite ’^'re''ree^tt#a. fe# ^ome preXls*

Ittsry taafe® a^leidt ^eMrAerature are beinf made to «£valttste the perfoolite presawe ref^ttlatln^ valve in the

inverted lfentef*n,

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for the iiecord

Revision cf Fererai Jpeaiflc&tion

(Eefrigerex.or»y Sleetric, ^elf-eontaiiif?d)

Meeting *j/X2/% At RBS, ivashiiigtoK, D* C,

Present! !'r* J* V, Bairid®on, QM Cossm&nd

C, PbiUips ) KinortJ Fujii . j

John W. Orlmes ] The pMTpo&m of thia isemorandum S@ fco enwi^rate the items

or ar«£i» ^ncerning Federal ^ipeelfication kk^IimZXlc t45l€fe need

modification or wiicb should be added to the present draft*

The ideas presented are tboae whioh there has teen essential agreeamRt on the part of representatives of the various

manufacturers contacted on the tiso recent trips s'iade for this

purpose by representatives of UMj^ HBd end hubiic Housing

Administration* As, presented, these items are not euggeebed

wording for the .pro|«sed- draft hut, are item© which must be treated in the proposed draft.

1* Tbs present draft of Aii-ii-2ilc deals with both commercial and doraestie refrigerators* It is generally agreed that

this ahot^d be divided into two separate specificationa*

2* The dk^mestic specification Cor household,} ahotild lael ude refrifor&tors up to mi iacl-udiag i^i cubic feet*

3, Definitions of freeser coaditioas must be clarified.

Temperatures of the frosex! food below 12 degrees for all coaditioae of o^^eration seem to be the appi^reat dividing line

between suitable and unsuitable freeser storage* la regc^^rd to

dimensions of freeaer compartments, freeaow capable of msiatainlag temperaturee below 12 des^rees may occupy a maximum of

30^ of the total food storage volunie and shell be a miaimua of

10^ of the total food storage volume* evaporators not capable

of it^eintainiiif 12 degrees esay not occupy in excess of ISF^' of

the total food storage voltme# The fropoeed Siothod of selecting refrl Iterator* with or without frosen food storage would be

by means of options available to the procuring authority*

4* SlBsenaions of refrigerators can be reduced from present

table values except for depth* Consideration of door ^ thickness

must be included in establishing the overall depth* Consideration must be given to listing; depth as the Bjinimuw opening

through which the refrigerator can be t^ken vdth or without the

door Tincluding hardware) depending on the ease of removing the
b-soOftM $»iU'

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odd j^tvodiO'f le odd no ,'?fifcbKiS»q»b {orievbTji^A ^ntbuloal) toob
z

door or hardware* The depth of the ceblnet In any event ebould

not exceed 25-1/2 inches fro» the overall rear projection (condenfor duct, etc.) to the door e3o3iir© face. Iliie la to conforiB to the standard cabinet er work surface depth. The apparent trend In refrifez*ator xioors i» to a thicker door (usually

vlth door ehreJves) which It hinfod In «t*eh a ranner that It

could not be opened if the door Itself were contained between

cabinet edges or >mlls, etc.

5. The u$e of pia^tlcs mmt be permitted for general use

for breaker stripe, aGceti5orieSj door liners, baffles, etc. but

not for inn^r liners.

‘ "' ' 6, Inner liner* of cteel shall be flalahed with ngircelalR

enamel. Consideration ehotild be ^ivan to the use of other £2.atcrlals for Inner liners. There BmmB to be general agreossetit

that steel finished with or*ianic enas^^el i« ni#ser deeirabie

nor natiafactojry for this application.

7, Cne-coat organic enamel exterior finish ie satisfactory if in accord with a suitable performance specification.

It is understood that this gpeclflcation will have to be determined.

I?. Iresent ineulation requiremetit referring to or *0"

factors^ sl ould be ell»inated In T’.referenoe to heat tr8«efer performance under a suitable high hmidity test condition. Tixts

is sofTieti.sses referred t© as a sweating test.

9. l>xlsting hWA end Ahk itandares dealing wl.th the subject of electric refrigerators shall be Incorporated whereier

proctic&l without change, to avoid industry confusion. It la

understood that KBS wlil conduct certain teste to detert^-lne the

advisability of recomsiendlnr the use of theae Standards, or at

least the test portions of tmm ^tiindards, entirely as presently

written*

10. Values for minlmusi shelf area must be established and

included In the tabular data for the various sieee to he Hated

in the apociflcatioR.

11. 3ultable definitions^ Ksust b«* estebliahed for describing the function of the evaporator section (or froaeu food atora«^e section) within the rofriverator* 'rh« isethed of alloc/lnv

the purchaser an option to procure a refrigerator in which

there Is a froeen food storage section, a® compared to one in

which there Is a normal iee-ujaVlng or evaporator section, muet

be determined. It appears that at present there 1« no e^blsfactory arnreement, either written or Implied, as to the proper

division between the two basic types of evaporators. The gen-
blssofi^. vnA at to •3>'^’T .»^^swbtiit^ to loob

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cral opinion to be that froE«« food mintalned at or below 12 vflll be 8’f^itablo for Bt&rm® period s of three

week® to a moistb i": vbereao the tfp« of eyaoorfitor which will

permit the fro^seis food t© rl30 aWvo 12 degrees as a result of

cyclio^ operation or which will m% reduce th©. temperature of

froaon food below 12 d«p:r©e s' under norssal operation should riot

be considered as tru3.T ^frosen ;'food storum***

•i,

‘ •

- 12. -kt present, Tyt'M t refrSt*:erators are listed only

through. 12 cubic feet. Conslderjition must be given to the marher o.f 8ise« to' be lleted as well as the to.lerance below Ii.stied slees wtdeh will constitute acceptable totsd food storage

vcluTse. Minus tolerances in the order of 5^ or i/2 cubic foot,

w^)icbever 5.e Sfsalleri will c.np4irently mrk no aerlouis herdrbip

on the product© thtis far i^urveyed in this project.

13. Automtic Ibifwsting. 7'he subject of defrosting can

apparently be best met by definitions of acceptable systetis.

’autoviatic" defrosting systems controlled solely by need for

defrosting have been observed. Principal systems obsserved were:

(a) ifi^^uual, in wliich the defrosting cycle was Initifttcd by the

user: Cb) initiated by nuisber of door openings, operating

time, etc.} (e) defrostlnf following each cycle of the

system. Iteae! (b) and IcT constitute the majority of the socalled autGi&i^tic systems currently available. Tf-'C «|ue3tion of

nec«!^.'?lty for defrastlng freeser comp&rti?«?iits needs further

study*

14. Packing Requirefsonts* Hestilts of field investigations

show that all manufacturers Interviewed object to certain presently required packing specificatlans f^md reqtiested consideration of the use of a performance type requireraent permitting

greater latitude in packing isethoda in which eornsricrcial, packing

as presently employcx'l can b® u?sed*

25. Colors, the revissed specification must incorporate

some r?©ans for perse.itting the use of colored exteriors 'iOd interiors. i'i’hat aver method, of selection at suitable colors, unless otherwise specified, ®11 refri -erators on a single order

id'iould be the as.m® color.

16. Ice,. All Kanufaeturers InterTiewed stated pres^ert

mi.niiRum ice requirements is greatesr than employed in current

domestic shipmetst, and this reqiiireifjent should be lovi?er®d accordingly.

17. Csoor Oa^skets* The present specifications should be

broadened to include polyvinylchloride as well as natural and

synthetic rubber*
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flcatlon for'boUMboXd*ty|i!0 ®ioetric,„r#frir?«rators# It is'bo^d

that 'they will sMiryo as"’ a

' practlcar' .ttiid©- to thoa« areas which

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I5»."n-— .-y^
lUf OF m B a 0 JtBmB at of 7/25/54

to rocall^tmFer property accountability *

X* X ^elfraot 6(K5 0 Disbwasbing: l^{.ac|?iise ;>©r #1100

2, 1 10 KW Ouar ^ntine-^'eoerator Kodel ^WC 4«10«r*2 (MBS 2?-50)

5# 1 Therm-^O-Katic Ice Cub® f^alrer (no* JBS, I'o#

)

.r - :/ jh-

<a . . 4* 1 Fork truck, Clark ftlactric .Kod. 2024 3«r 2^0 {kB3 15-50)

.^, . • v’r'.

"

if''"

' ; “

'

'

5. 1 TberfR© linr 1/3 tor gan’' engine drS’ff'en plug type refrigerating mit 1%4* ai5^^ ,Ser. |X' (SBS 54-51)

: 'j^' is

' > - 6. 1*1/3 "ton gaa ©nglne drlvan plug type refrigerating, Carrier

Koael D731 'Serial g9444 (iiS 53-51) , if > t ^ -ff- .... 7* 1 tc® Cub® (MB.l' 39-50)

1 1/2 ton driVen plug type refrigerating

King i‘od#l 0-35 3#riml 124^" (UBS 16-50)

9* 1 600 cti« ..ft. refrigerated wfarcbaust prefabricated, r5.®SiO'untabl c Buoi5!^!an, t x 8 x 12 (Jf'iil 15-50)

'v ^

• “* '

4.-., '? . ^'‘

j'

10,

1 150 cu. ft. :re.frl .gtrator , walk-in, t>©rt^ble, Brofeii ^*odel

^«50 ^.^erlal #‘^565 65-51a)

' '

11, ' 1 1/3 ton electric mtor 4riwm thermo King plug type refrigerating unit Podel 6 15F, ilerial |6?9 (HIsS S5-51B)

12. 1 1/2 HP iengatreth compressor (ItSS 77-52) •

13* 1 better, Tent, f^asollnc, ffersi-^m Mol son lodel ?B 3077 C"i

’Serial 1103 (IBS 93-52)

14. 1 Heater, Trot, Herman k'odel OT-30?? '®rlal #32603 U^B3 94-52)

15* 1 Heater, Tent, Oasolinc, ^il«int <31 ow ?-od®l 30 3077 -srlal 1352 Im-B 95-52)

16. 1 set of test ducts for use with Heater, Tent, Oasollne,

apr.'rox. 1# pieces in all (KBS 93a-f-52)

17« 1 690 cu. ft. refrigerated varebouse, 'prefabricated, demounta.fele, Heco, Identified as "<H«eo-Fab Metalply ireeze

Cooler^ {KB.'S ^0-52)

IB. 1 3000 cu* ft. refri,(r.erat«d warehouse, prefabricated , i’. • Flywood (MdS 102-53) Mote: T; Is warehouse sent to hi. si for

use ss field test structure.
i'

to -kA r Ij TTIJ

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List of Ql" R & D Iteiss at ^8S Continued 2

19. 1 1/2 ton gas engine driven plu^ type refri?ceratin,-»' unit

l‘h«rn^ Kodel KIO Serial #aB109Q3 {n^S 100«53)

20 . 1 7 X/Z ton 2’-wheel semi- trailer, refrigerated, 3ro'^ -odel

var^lU Serial #453«T533-21? 103a- 53)

21. 1 1/2 ton gas engine driven plug type refrigeratinr unit

Ther»>o ling ^^odel CCQS Serial #2 (BBS 103B-53)

22 . 1 1* tftn gas enriij© driven plug type refrigerating unit Thersio

King Bo^ei K-i^l l.erial #Q^206 101-53)

23. 1 ditto 22 Model MQ 51 serial #196 ims lOB-54) ^?ot©: This

unit from Army stock at Coluii>feus Depot.

24. 1 ditto 22 -^odel 1*151 Serial #199 (i^BS 110-54). Kot©: this

unit from 3. Yeardley Smith, Jialtiiaore, i'-d.

25. 1 SI ©Ctrl e drive conversion asseislly for MQ51 therruo King

refrigerating unit# (IBS 107-54.) Botes This convcr^iivn

has b«^®a asse^afeled into Thermo K^lng Model K.,51 --'erial

#0^200 (MBS 101-53) iR rlace of the original iSiOdified Grosley gasoline engine.
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