34
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NATIONAL BUREAU OF STANDARDS REPORTNBS 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 speclfl-
ir 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 AirConditioning: ciecftion, Building Technoloi^y Uivision, ^atlorial
of -^tanQ»rdSj in behalf of the h-ecbjinio^il ^:m;ineeringdivision, Beadquartere, :!«arte»ast«r 'General -i^mmrch andrevelopEiont Coms&and, U. ,,S* this report covers ap^:‘rim!, of isonths, 'it has bean proposed and be-tween KBS and "Wt E I'i that future” pro^re-s'.?. reports willcover period# i3o ^Toater than' ©ne^quarter year*
Th® aervieoa of fotirteen isemhera of the ataff of the-Beating and Air Conditioning -.^otioE and specialised facil-ities of that ^mip located in six bi?i.ldlngig at the f^etlonaXBureau of ^^tandards have been direetly otiSlsed m required •
to further th® work reported# The services and facilitiesof other sections at KB3 have boen dr^m on as required# "heprincipal activities on this pro^mm &re itemised below, to-gether with a discussion of 'tfee progress during the pre:^entreport-iiif; period or their status mt the end of the reportingperiod#
itofe: 1# mvicda tnmms^ mfont
^*'^*A* Eeport ho. 2956, cowring activities? in the p^^riodfro® July 1 through hov^^ber 30,1953 wa« subasltted on DecesborA, 3953*
2# .haiFii.i2 imrm^ mH
The final report Keport ho# 30,5?* entitled *^hor-fors^ance of Erl frees rrier© in a Freon-12 H«frl^<irj^tin?? ;-:ya-.
t«&,” was submitted on January 15, 1954. it covered resultsof t«8v® and investigations ®ade of a proprietary device forremovlriij moisture frop. a refri >*«rating syataia, asanufacturedby the Bema ^wporatlon, '-’Ichgiond Hill, hew York, and mar-keted uniler the tr-ade cuvse ^^tJrifreea .hehydr^itor,"’ CelciuiBCar'bide was employed m the desiccant faaterial arid the teat
'
program was arran<5«d to detemine characteristics in threeaspects;
1. brylng tests2. MmrdB3# “assistance to vibration
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An of l'rlfr©«£ -.rier is contaimd o« 39 ofreport ??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^stsof a Prototype 1/2 HP F^lve-Ciylinder l^adlal wass«b?tltted on 11, 1954*
this Oo^pressor appeared to have potential ¥alue beoau«eof Its’lii^t weight and sRall si«e* Undesirable oharaoteris-tlcs were his-h power conTOEiptiioii, porosity of th® casing, andvibration.
if’,.-
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iteir u, 1/2 rm Pim^m% mi?
'fbe previous prog:ress report presented the essential re-sults observed free tests of a I -IO fhttrmo ^In.^ nlug-type g»s engine driven refri .aerating mi t Ts^en ererated over& rah^e of spoeds.
,
A first, dr3^ft of the final report of these tests has beenccffiploted* ^ ";
Tl,e objeot-lve Of these tents ms' to deterndne the practic^slrang-e of oapiEcities for 10*F and 35*7 refrii^erator te^paratoresat an aasbiont teasperatwre of 110*^ F obtainable by vary! n^r theoperative speed of the ms engine* '.?he oondenaer and evaporatorfans v;«re I'^et coairolled at a cooftaat spe^d for the range ofteots but were operated at speed?? proportional to the ^asoltneeu^-ine by the belt drive lncorporat.^d in unit*
It figs 5, 1/3 bHlT, ( :X^}
k T1. 0r£iO Elr4^ hodel ^4, 15 pitig-type gasoline driv-
en refrigerating unit was? tasted mder conditions as renerallyreferei-ced m-:’er discussion of' th^ 1/2 tor unit* (Item 4. ofthis progress report)*’ ' Fan 3?peeds were sfiaintalned constantat each of two valtiea while engine speeds (and compressorwere varied over a considerable range for one series of t^stsand 'were operated proportional to 'ipeed char^^es by i. e^msof the belt drive for another *»cries of tests.
17;e increase in net refrl ;«?rating capacity as cof»!r^ared toproportional speeds was algriifiC'aJifc and has been reported *re-
vioualy. A decision to curtail further ‘^uch invusti^'ation oi
this particular unit in this rejffird waa made and the fi.nal re-port of this worV is nearin-- completion.
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compl^^ea pr^vloua to tbls re- ortic?t perio<5 ofa *.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 aui-
biaat teisteratisres of 70®F, 90* ? ,llO^F and 125*^1 and at re-
fri«r#ration toiEn^raturos of lO*"?* 35*"^' lowoat obtain-able for each ambient.
Tl-.e ca. aclty ran4ja<J fro«J 9700 BTUAj^* at 35*1 refrigsmtorte^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^r-ator 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 tilsr«^perting period to determine capacity at ambient feosiperaturesof 70*F, 90*F, 110*f and 125*F and. at refrigerator tosperaturesof O^F, 35*^ and lowest obtainable In the test 'mmhouQe, wfe-
served c&pacilles .ran:':ed fro® 2100 STC/hr at 70*'F amMent temp-erature and-23*F, rcfri|;:erato.r twartture to 10,300 BTl^/hr at70*F assbient tp-sperature md 35*7 refrigerator teisperatwre* -.t
ll0*F ambient t-eir^perature the capacity ran^^d 2750 BTt/hrat -10*F refrlforator teasperatiura to f750 ImJ/hr at 35*h refrig-erator 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@nair eonditloninp'r unit desli^ned for use %dth Ys«m type trailersand .mamifactored by General hJactric Co&psny v/ere completedorior 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 Inafeeysnce pending « decision by the manufacturer to modify theunit. 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 entireunit within the eondltioned space, the entire -init outride theconditioned space ana with the i^nlt divided, i.c. with ;.-he
Cvondsnslng unit outsi^'e and the evapor.';tor unit with in t* econditioned «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
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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 andthe type of air flow sisa«ur.ing' devices to b€ u;?ed ,Iiav*e beenselected* i ai?aulated food load consl^^tin* of 1*1 cii* ft*cases of eo®bat food rations has been placed in the trjiilerand the trailer has been Instoll^-d In a teet ar#a suitafclc forthe tests proposed* %rk can be resated, at any tin:©*
Itfir 10* .TEHT HUTSif, ripD
In extended serSea of of various eoispanents of threefasoline fired tent hosterd were essentially cosjpleted priorto this reporting period and eQ^t of t>e information requestedhas beer relayed to interei?ted repra.?enti,tivc3 of fhofinal report for this mrim of ia nstirly completed*
kneh of this work centered around the used to .tovethe beat.-ing air through the hcatar assembly and iucladed mchittJBS os position of the fame 5.,n the shrouds, pressure 'Gropthrough the beater, coiapari son of oomp^ .fans, eairo-'ration of test ducts, calibrutio,n of tsoasuriui; ele-ments, as well as dtterminlnf?, air s^ovlna ability and- horserequirements of these vrtrious fans*
Ttem n. .fS2»^E0iTI^a ClhGUC’:^J3fIC3 1-TCi UT’iT
This project was instituted prior to this rsportin^: per-iod to determine the cfear&ctsristlcs of ttee present oefro stingarrangc3:snt of the thermo hir^ !^odel 51 g-^sol ine drivenwarehouse refrigerating us;it ao tH^^t .direct co.itp»ri.son couldba laade vvlth proposed .modi.ficat ions of this system*
'erk was Guispleted earl.i^?r on ..the first phase of t'-G^etests, with an empty 600 cu. ft. prefabricated warehouse usedas 4 calorimeter# The second phase, with a simulated loudconsisting 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 withinthe ^var*hou.^5e during dcfrosiiiv:, and the time required for froto 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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Tfs© 51 1‘hfiTmoi Einr g>j.6olin« en;-’i»e driven unitref©renc©r’ in Iter, il was convertffd to electric imtor drive byraeans of a canvorsiou kit inainjuTactured for this pur|?o??« byIK d, Control Cotspmy» It pre .turned that this eon-version was deai^^^ned to proc'uo® capacity equivalent to the r»a»-
oline eri?^ine drive* The eo&ipresj3or operated at 2400 rpm-
desi(js speed vinder gas engine ’ drive but the electric convoraioridrive op©rated it at 1750 rpm* fehile ihla prevented directcomparison, ssignlf.leant op<&ratir4g data was ^’.erlved fro® tr,eaetestiS*' It is probable that the results of these t-dJl bereported in conjunction with oth^r ^ork currently in ,pro^fr^ssconcerning 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 asriiodificfition of the 1-ton f,aa engine pliif-type Vfarshouse refrig-erating imit* ''rhree hodel K...- 51 ^hor^o Ting tmits aro currentlyat 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 xromColmbua -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 con-verted to electric asotor drlvo uik! which was used ir* the de-frosting studies* The second CiS.l 101^-54) is currently 'beiafjg
tused in the rodifi cation st:w!i®si# The third imtt ha® apparentlynot bees opcr:’ted It was originally packed for ship2i«Rtby the factory*
*'ork Is currfsntly In nrogrese os modification of who sec-ond unit 101^-54) along, linens outlined by the fefrl .aravionHquipjscmt Brands. A prototype heat e^xeban .'.er was fabricatedand tested to deterMs® feasibility of ejttracting waste heatfrom the gas engine exhmuagt and intx’odueing it in the x'ofrig-erant circuit as a aourc® of hm% for either defre-sting of therefrigerated coils or heating of the refriger?ited apace. ‘.^:e
results of these prelljalsary tests were reported in a lettert-o fr. David I, 'Fiske d.ated July 30, 1954*
The co»r5onent® and installation outlined by the Eefri.r-er-ation Equipment Branch at a betv.^-^en group andrepresentatives of the .eating and .-'-ir v^ondltlonlng ’ection,
et ICatlcky Bass., on >:ay 6, 1954, (reported as Itesi 14.1have 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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eonr-Tois «Bd autoff-atic i rovii.H.nf ttuto:.;«cic cr • ^rcifor control of both cooIic". &r-d ag nno i<;ftcts;v (orresuJt-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 chid-ing sr-o^^m proisds®* Vbis iTivestiiJiaoion is heir;: coxit ir-ue-- *
14-« td&fc'fl’i'iU iiT i'i Jt ai 6j
; r. P^» -* Pill, Chief, >« *:-* hcbenbacl, .nss*t whiel, and*. ihlliipe, y®ch. Lngr# of the iicating -und .^ir C-ontlitlosing
deefcion, Jd38 «et with Ir. •'«l#ch t, •diittlecey, Chief, Refrig-eration F.quipaient ''-ranch, I ilitary riarming I.dvlsion, ,
1 St B CofiiR’and end others of Ms organisation at their officesSit 1-a.tick, -f -iss., on l-my 6, 1954* e general of tiemeetlri? v^eret
1* ’ renentntlon of ooellng, defrost and feating re-quiremantf
•
2* ‘•'resentatlon of Veardley -fslth’s report on defrost •: nt^.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.
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( 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-senta ined ) • T-ao llelc:trips by rep.r« sentat i-ve» of h 1. 9, liiJl nnc ublic loctiing ..d-
Ainistration wre ssiade. Hie easential pwrpoae of theso ' tripswar. to »eok out the lirset opinions of r-ev^sr I tanaf^cturar-s ofrefrivf.erators in regard to c- "Xf-nt and pror-o.'V.-d tre la theproducts! 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 toand Ineludlnu 15 cubic feet, sr oul •." te ccv*»red by u ‘.'©r.u.r.^'. especifIcation 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,.>rdto the domeiSaic vefri:-.«sratorrj« a*; .ifact, or-m-d Visited uxiriti'z
the two tripn were - =^.^1 :? rj -.rid.riiro, =-rt3ley, ^nv.crnu-tlonal larve te.-, .d:.^.^&}.
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these conferor cf?6 are curroivtly wetuq r-nurd'in-i’.f d with '^'^Ir-r
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df>ttr?iiiriSitlon of ^ satisfactory te^sp^r^ture level for the freeserco!?:part.?uent in a domeetic refrliberator, cossspanles, eating-house end have offered to saEsple® of currentlt«iJ3 for atudy. An T cubic foot fri^lhalre ’’CyclotiWitic'’ (self-defroeting) refrigerator ha^ bmn received and i» currently beingtested 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^ouidbe added to the present draft was prepared at a sneeting July12, 19*51, at MBS between represeBtatives of the heating andCondi tier ini;; •ection, KBd and ii.r* J* f* t^avlds©rii|, A@cb, wfig* ofthe'^l^efrlgeratioti Iqulpisent Branch j EQ, Cb% H 4 n Corwand incharge 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, . hiHipsto Kioet with hr. Freak Reinhardt, Chiefs Ori'anic ilaaticaSection, livlslon of Crganl© and Fibrous i’^-aterials, on *iUf-
ust 5, 1954 to outline the grethed of proviolng for the use ofacceptable plastics in certain parts of refrigerator construction.
Iten 16. m^El HSO n.m.Q KIKG
On request of Fr. ;#jittlosey, assistance waa rendered toa reprev^entative of the patent Section, C-.M in regard to the1/3-ton fos engine driven plug-type warefcouse s*efriderating,manufactured by H. S. 't’henr^© Contr^^l Company, Finilft’apoli®, • inn-©ecta and eeiploying a combination starter-generator In conn-ection with the gas engine, rescriptive Inforsati an and photo-iraphs were furnished m reqnest#d.
Files of the heating and Air uendltloning Section coalin'wi.th various items of portable gas engine driven units manu-factured. 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 quickrefer 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 inccimection »sflth hearings belnp held in ••asJ^lnPton reletlve toi.he cosibination starter-generator.
Iteiv 17. ROTAtABi.g dlFUiTAfRCito HhAf aHl- OR TK^hytbt,
A program:, for tb© continuation of the studies of watervapor tr&namiasion in refrigerated wai-ehouaes was prersred andapproved during this period* T- e insulate<ri panel required forthis pro r«Ki was constructed at the hatick Laboratory cf l
,BAD and shipped to tils ureau. i* is panel is currentlybeing inctslled in the rotatable arparatuij for of watervapor i'.oveaent in Its cons«truction.
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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&ndC, PbiUips )
KinortJ Fujii. j
John W. Orlmes ]
The pMTpo&m of thia isemorandum S@ fco enwi^rate the itemsor ar«£i» ^ncerning Federal ^ipeelfication kk^IimZXlc t45l€fe needmodification or wiicb should be added to the present draft*The ideas presented are tboae whioh there has teen essen-tial agreeamRt on the part of representatives of the variousmanufacturers contacted on the tiso recent trips s'iade for thispurpose by representatives of UMj^ HBd end hubiic HousingAdministration* As, presented, these items are not euggeebedwording for the .pro|«sed- draft hut, are item© which must be treat-ed in the proposed draft.
1* Tbs present draft of Aii-ii-2ilc deals with both com-mercial and doraestie refrigerators* It is generally agreed thatthis ahot^d be divided into two separate specificationa*
2* The dk^mestic specification Cor household,} ahotild la-el 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 coa-ditioae of o^^eration seem to be the appi^reat dividing linebetween suitable and unsuitable freeser storage* la regc^^rd todimensions of freeaer compartments, freeaow capable of msia-tainlag temperaturee below 12 des^rees may occupy a maximum of
30^ of the total food storage volunie and shell be a miaimua of10^ of the total food storage volume* evaporators not capableof it^eintainiiif 12 degrees esay not occupy in excess of ISF^' ofthe total food storage voltme# The fropoeed Siothod of select-ing refrl Iterator* with or without frosen food storage would beby means of options available to the procuring authority*
4* SlBsenaions of refrigerators can be reduced from presenttable values except for depth* Consideration of door ^ thicknessmust be included in establishing the overall depth* Consider-ation must be given to listing; depth as the Bjinimuw openingthrough which the refrigerator can be t^ken vdth or without the
door Tincluding hardware) depending on the ease of removing the
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door or hardware* The depth of the ceblnet In any event ebouldnot exceed 25-1/2 inches fro» the overall rear projection (con-denfor duct, etc.) to the door e3o3iir© face. Iliie la to con-foriB to the standard cabinet er work surface depth. The appar-ent trend In refrifez*ator xioors i» to a thicker door (usuallyvlth door ehreJves) which It hinfod In «t*eh a ranner that Itcould not be opened if the door Itself were contained betweencabinet edges or >mlls, etc.
5. The u$e of pia^tlcs mmt be permitted for general usefor breaker stripe, aGceti5orieSj door liners, baffles, etc. butnot for inn^r liners.
‘ "' ' 6, Inner liner* of cteel shall be flalahed with ngircelalRenamel. Consideration ehotild be ^ivan to the use of other £2.at-
crlals for Inner liners. There BmmB to be general agreossetitthat steel finished with or*ianic enas^^el i« ni#ser deeirabienor natiafactojry for this application.
7, Cne-coat organic enamel exterior finish ie satisfac-tory if in accord with a suitable performance specification.It is understood that this gpeclflcation will have to be deter-mined.
I?. Iresent ineulation requiremetit referring to or *0"
factors^ sl ould be ell»inated In T’.referenoe to heat tr8«efer per-formance 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 sub-ject of electric refrigerators shall be Incorporated whereierproctic&l without change, to avoid industry confusion. It launderstood that KBS wlil conduct certain teste to detert^-lne theadvisability of recomsiendlnr the use of theae Standards, or atleast the test portions of tmm ^tiindards, entirely as presentlywritten*
10. Values for minlmusi shelf area must be established andincluded In the tabular data for the various sieee to he Hatedin the apociflcatioR.
11. 3ultable definitions^ Ksust b«* estebliahed for describ-ing the function of the evaporator section (or froaeu food ator-a«^e section) within the rofriverator* 'rh« isethed of alloc/lnv
the purchaser an option to procure a refrigerator in whichthere Is a froeen food storage section, a® compared to one in
which there Is a normal iee-ujaVlng or evaporator section, muetbe determined. It appears that at present there 1« no e^bls-factory arnreement, either written or Implied, as to the properdivision between the two basic types of evaporators. The gen-
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cral opinion to be that froE«« food mintalned at or be-low 12 vflll be 8’f^itablo for Bt&rm® period s of threeweek® to a moistb
i":vbereao the tfp« of eyaoorfitor which will
permit the fro^seis food t© rl30 aWvo 12 degrees as a result ofcyclio^ operation or which will m% reduce th©. temperature offroaon 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 onlythrough. 12 cubic feet. Conslderjition must be given to the mar-her o.f 8ise« to' be lleted as well as the to.lerance below Ii.sti-
ed slees wtdeh will constitute acceptable totsd food storagevcluTse. Minus tolerances in the order of 5^ or i/2 cubic foot,w^)icbever 5.e Sfsalleri will c.np4irently mrk no aerlouis herdrbipon the product© thtis far i^urveyed in this project.
13. Automtic Ibifwsting. 7'he subject of defrosting canapparently be best met by definitions of acceptable systetis.’autoviatic" defrosting systems controlled solely by need fordefrosting have been observed. Principal systems obsserved were:(a) ifi^^uual, in wliich the defrosting cycle was Initifttcd by theuser: Cb) initiated by nuisber of door openings, operatingtime, etc.} (e) defrostlnf following each cycle of thesystem. Iteae! (b) and IcT constitute the majority of the so-called autGi&i^tic systems currently available. Tf-'C «|ue3tion ofnec«!^.'?lty for defrastlng freeser comp&rti?«?iits needs furtherstudy*
14. Packing Requirefsonts* Hestilts of field investigationsshow that all manufacturers Interviewed object to certain pres-ently required packing specificatlans f^md reqtiested consider-ation of the use of a performance type requireraent permittinggreater latitude in packing isethoda in which eornsricrcial, packingas presently employcx'l can b® u?sed*
25. Colors, the revissed specification must incorporatesome r?©ans for perse.itting the use of colored exteriors 'iOd in-teriors. i'i’hataver method, of selection at suitable colors, un-less otherwise specified, ®11 refri -erators on a single orderid'iould be the as.m® color.
16. Ice,. All Kanufaeturers InterTiewed stated pres^ert
mi.niiRum ice requirements is greatesr than employed in currentdomestic shipmetst, and this reqiiireifjent should be lovi?er®d ac-cordingly.
17. Csoor Oa^skets* The present specifications should bebroadened to include polyvinylchloride as well as natural andsynthetic rubber*
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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#
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4* 1 Fork truck, Clark ftlactric .Kod. 2024 3«r 2^0 {kB3 15-50).^, .
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5. 1 TberfR© linr 1/3 tor gan’' engine drS’ff'en plug type refriger-ating mit 1%4* ai5^^ ,Ser. |X' (SBS 54-51)
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6. 1*1/3 "ton gaa ©nglne drlvan plug type refrigerating, CarrierKoael D731 'Serial g9444 (iiS 53-51)
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7* 1 tc® Cub® (MB.l' 39-50)
1 1/2 ton driVen plug type refrigerating
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King i‘od#l 0-35 3#riml 124^" (UBS 16-50)
9* 1 600 cti« ..ft. refrigerated wfarcbaust prefabricated, r5.®SiO'unt-
abl c Buoi5!^!an, t x 8 x 12 (Jf'iil 15-50)'v
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1 150 cu. ft. :re.frl .gtrator ,walk-in, t>©rt^ble, Brofeii ^*odel
^«50 ^.^erlal #‘^565 65-51a)'
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11, ' 1 1/3 ton electric mtor 4riwm thermo King plug type re-frigerating 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?? '®r-lal #32603 U^B3 94-52)
15* 1 Heater, Tent, Oasolinc, ^il«int <31ow ?-od®l 30 3077 -sr-lal 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, de-mount a.fele, Heco, Identified as "<H«eo-Fab Metalply ireezeCooler^ {KB.'S ^0-52)
IB. 1 3000 cu* ft. refri,(r.erat«d warehouse, prefabricated,
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Flywood (MdS 102-53) Mote: T; Is warehouse sent to hi. si foruse ss field test structure.
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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,-»' unitl‘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 unitTher»>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©: Thisunit from Army stock at Coluii>feus Depot.
24. 1 ditto 22 -^odel 1*151 Serial #199 (i^BS 110-54). Kot©: thisunit from 3. Yeardley Smith, Jialtiiaore, i'-d.
25. 1 SI ©Ctrl e drive conversion asseislly for MQ51 therruo Kingrefrigerating unit# (IBS 107-54.) Botes This convcr^iivnhas b«^®a asse^afeled into Thermo K^lng Model K.,51 --'erial
#0^200 (MBS 101-53) iR rlace of the original iSiOdified Gros-ley gasoline engine.
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