Did I miss something or was the fact we need to figure this for a moving object not addressed? The R factor will plummet as speed increases. It will also vary wildly with the aerodynamics of the object (laminar vs turbulent flow).
Not a simple problem! Many zillions of hours of computer time are spent calculating things like this with CFD codes. Very Good stuff though .. Cheers! Frank T-Y's iPhone > On Oct 13, 2013, at 9:08 AM, "Hoegberg ." <[email protected]> wrote: > > I think this "Another method of heating an Ev" - story below was interesting, > but I did not understand it first, as I was reading it to fast. But not > even so after second slow reading could I make it trough this message. No > offence, It is not bad, Its just me. > > > The SHORT: > > Sugestion: > -Again, no offense all people of other small unknown cultures, ..but some > Irony might have been added. :-) > > As this is an international list, please can we try to use the normal units > that we all(almost) have used now for 100+ years) And many have used them > since year year 1795 just to to clean up the international bad-unit-mess that > we had way back then over 100-200 years ago. Please try hard and your very > best now and not fall back to the older, harder and highly local unknown ones > and/or other bad habits. > > Of Course We can also continue to cripplecode some messages, but I dont think > you will like for example all our older local Swedish units. :-) > > > > Let The LONG unit rant begin: > (for a deeper understanding of the problem, ..or not.. :-) > > F = it seems not linear. Please use Celsius or kelvin ? > BTU = use Watt and Hours(?) > USATU = Watt and Hours > HP = please we must KILL all the indicated, british or braked or the invented > electrical Horses.. > > For example: > lets measure the A/C equipments cooling capacity in parts of a highly unknown > animal. Really?? Cant be the very best method, or is it? > > R-factor = I dont know about this, but I assume it IS international for > insulation calculations? Local here it was "K-value", but nowdays I think it > is "U-value".. :-) > > 300 W of cu bi heating of unknown or generic gas(probably not the > Super-"gas" they have in gas stations) = ? > complicated! > > 4 wire = ? Maybe an easy calculation, but I dont know it. > > > > But what about MILES? > > mile = Hmm, Is it English, brittish or imperium (is it the same imperialistic > mile?), or is it the local states in 1 other countrys roads, or maybe > texas-land area-mile, or international nautical miles or ..is it just a > normal(NEW) Swedish mil? :-) > Who knows, > > Ok, But how LONG is this "international" mile? > = 1852 I guess! As it seems to be the only commonly used mile nowdays, > > -Cool! So Can we use this? > Well, yes we can! ..BUT this sometimes seems to be mixed up with The > Imperialistic (UK) nautical mile someone might refer to...., That is exactly > 6,080 international feets = 1853,184 m but abandoned in 1970, so all older > references are now converted to 1 85_3_,000 meters exactly here.. > > The USA-mile was 1853,248 metres here before. > (6,080.20 U.S.A feets, based on the definition of the foots recently in 1893. > it was also abandoned. and their feet grows bigger when they get richer and > can buy more food) > > English usage of sea mile varies from about 1,855.3 metres to to about > 1,849.1 metres I beleve, So you must know exactly where you are at the moment > (?), to know how long you have traveled. But in "average" you are close to > almost correct if you use 1,85_2_.3 metres average, but you will probably hit > the ground hard sometimes.. > > > > -Ok, puh.. Is it really that HARD for us to agree to keep one mile distance? > > Yes, and then there is the geographical "mile"... > It is the length of one minute of longitude along the Equator, about > 1,85_5_.4 m (on the International (1924) Spheroid )or about 1,855.325 m on > the WGS 84 ellipsoid. (Bowditch defines it as 6,087.08 feet, which is > 1,855.34 metres. But it looks close to the English seamile? -Yes, in some > places, sometimes..) > > AND PLEASE Do not confuse this with the similar-sounding unit the > geografische Meile, in German measurements. The length of FOUR minutes of arc > along the equator, standardized as 7,421.6 metres. > > In the USA nowdays a "Metric Mile" is exactly 1600 long. (?) > But all other countries just ignore them, as it is known to be 1500. > > In Germany, the Mile , Uhr or Stunde > typically refers to 24,000 local feet = the distance one might walk in an > hour (Stunde) if he likes to do that.And sadly there is also the tactical > "mile" or data "mile" used by some navies = 6,000 of local(?)feets of > somewhere, but known to be (1,828.8 m) . In the Royal Navy, this is also > known as a data mile.- SO.. seems a bit complicated with this "mile"-thing > ! Therefore I suggest that WE ALL now agree to use the Swedish "Mil" > instead! It is the perfect Mile!! Also I am most used to this one, so I > assume that all of you must agree on this, it is clearly the future of units. > > > > ""The traditional Swedish mil spanned the range from 6000–14,485 metres, > depending on province you had to visit. It was however standardized in 1649 > to 36,000 Swedish feet.. or 10.687 km. The Norwegian mil was 11.298 > kilometres. When the metric system was introduced in the Norwegian-Swedish > union in 1889, it standardized the mil to exactly 10 kilometres. Mil is still > commonly used when measuring fuel consumption in vehicles; e.g., 0.5 litre > per mil."" > > > And there is *a LOT* of other "miles" out there, for example the Roman > imperium mile, or 20+ (?) other ones here: > http://en.wikipedia.org/wiki/Mile > > I beleve Finland have also had at least 3-4 different "mile", depending on > who invades their country for the moment, maybe some mil from .se, and some > of the .ru miles and also the local Finnland-mile, -Jukka, is this correct? > > > > > wow.. > > Here is some other local units, that might ,or not, have been used here on > the list: > > " 1/231 us-inch of 100 Gauges of copper wire" = how many mm^2 is that? > > How many Swedish "verktum"-inch will it be compared to us-inch? > > square fots of unknown size per punds of usa-inches = ? > > > > Gallons in a mile of electricity, "eGallon" (of unknown local usa-sizes?) = > ? > How many kWh / 100km is that? Or how many kWh / Swedish mile ? :-) > > gallon per mile (uk) = ?? > > Psi(PascalPer..local inches in nice squares) = unknown sized inch ? > 100000 Pascal =1Bar , > or use maybe inexact but close enough: kg/cm2, or Atm that is more easy to > relate to. > > quarterpoundr (Kilogram) per usafoot (meter) = N m ? > > mile of roads (usa)=1.6xxx km > mile of maps or land(United states) =1.xxxxx km > mile (United kingdoms) = 1.xxxxxx km ? > mil (United Sweeds) = 10 km > > mm 0.001 meter > meter = 1 meter > km =1000 meter > > ton =1000 kg > kg = 1000 gram > > > > -But what is 1 lb / sqft = ? > Its easy: > " libra or libbra (lb)a traditional unit of weight in Italian, Spanish, and > Portuguese speaking countries. The libra was the Roman unit from which > the English pound is descended; the symbol "lb" for the pound comes from > this unit. The Roman libra contained only 12 unciae (ounces) and was > about 0.722 English pound. The traditional Italian libbra was often of > similar size, but a wide variety of libbras were used in Italian markets > over the centuries. The Spanish and Portuguese units are larger, > generally in the range from 1.011 to 1.016 English pound (very close to > 460 grams). The Spanish libra equals 16 onzas, and the Portuguese libra > equals 16 onças. The word "libra" is sometimes used now for the kilogram, > a much larger unit." > > No, of course it is just the Swedish "lb" beeing used here: > = SkeppsPund "ShipPound" = 1 skeppund = 20 lispund , as well known that 1 > lis pund = 20 skålpund and if you know that 1 <lb> = 1 skålpund will be = > 32 "lod", ..as 1 lod = 4 kvintin (or "quarts"?). Now it is very easy to > just do the math, as we all know 1 kvintin was ~= 10^-2.47874 kg > > Then we just have to devide that by 1/6 (maybe) of the email-senders countrys > average humans height at some agreed year. (we are toold in school that > sometimes in some foreign old cultures feets (foot) is 1/6 of the > lenght(height) of their older humans(but they are all dead now, so we cant > really measure that) ) and then we put them all in 90 degrees and multiply > them? ..Or someting like that, I cant really describe it but seriously we > all know exactly what we mean, so I assume we can finally all agree on THIS > one, at least? ..right? > > > > Great! > > -Now I only need to find my new EU-banned 60 Newtonmeter per second of metric > light-bulbs for my kitchen, so I can see what I make for dinner.. > > > / John > > > > > > ---------------------------------------- >> From: [email protected] >> To: [email protected] >> Date: Fri, 11 Oct 2013 09:31:58 -0600 >> Subject: [EVDL] Another method of heating a EV >> >> Receiving my first EV call Transformer I which was a converted 75 Chevelle, >> The company, Electric Fuel Propulsion added some additional heating systems >> for my car which was to driven in Montana and steep hills. >> >> The power to drive the heating system or the A/C system does not come from >> the main battery pack which was 90 cells lead cells rated at 2.2 volts 180 >> volt battery pack. If you let the battery cold soak down to 30 degrees which >> I did only one time to see what the effects it would have. >> >> At a 80F - 30F temperature differential, I can actually add about 25 volts >> to the normal charging volts of 225 vdc at 80F to about 250 vdc to the >> battery at 30F. >> >> Before the EV would leave the garage, which the walls were insulated to 55 >> R-factor, the ceiling to 110 R-Factor and the garage door is a foam door at >> 20 R-Factor. The heat lost at 30 below 0 maintaining a inside temperature of >> 70 F becomes about 1200 btu's per hour is about a 300 watt heating or a 1/3 >> cu bi feet of gas heating. >> >> Having the main charging cable plug in all the time which is a 4 wire >> 125/250 vac, the on board heater of 640 watts come on about 15 minutes >> before I leave. The inside temperature will be at 80 F degrees when I leave. >> I do not have to use the on board power for at least 2 miles of my drive. >> >> I have the option of switching the 3 position selector switch from >> Commercial Power to the on board Inverter Power. Because of the roller >> coaster hills we have, the on board power only comes on when I let up on the >> accelerator. This activates a relay which turns on a contactor for the >> heating system which consist of a 640W, 860W cabin heat and a 1000 watt >> water heater. >> >> Going down hill the motor still turns which drives a 7 kw inverter >> alternator. At this time when I look at the gages, my motor and battery >> ampere is at 0 amperes and the inverter voltage is at 120 vac 60hz at 8 amps >> for one heater and about 20 amps for all three heaters. >> >> The inverter alternator is a Delco unit design for utility vehicles. It will >> also provide 12 to 15 volts DC up to 135 amperes. This 12 volt system was >> also back up by a Honey Well motor generator which the motor is driven by >> the 180 v battery pack. This unit had two pilot shafts that drives the >> vacuum pump, power steering and A/C. >> >> Remove this motor generator and now belt only the A/C and Inverter >> Alternator off the main motor pilot shaft. These units are off line when the >> motor is under load and off when the motor is on load. >> >> Roland >> >> >> >> >> >> >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20131011/3cd29f2b/attachment.htm> >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> For EV drag racing discussion, please use NEDRA >> (http://groups.yahoo.com/group/NEDRA) > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA > (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
