What are the pros and cons of infrared quartz heaters using copper heat exchange? Also, is $300 a too much $$$
920164
Does the "promotional litearture" keep you warm?  Try burning it, that might produce some heat.\n\n$300 is too much, you need that money to pay your heating bill.  Anyway, I seriously doubt quartz is any more efficient than a cheap space-heater.  They're both 100% efficient at converting electricity into heat.  To improve on that you need a "heat pump".  \n\nThose are just an air-conditioners that are turned around, so that instead of pumping heat out in the summer, they pump heat inward in the winter.  To use one you need a source of heat that is above 40-50 deg.F, such as well water.\n\nYou can als:\ndress more warmly\nturn up the thermostat\nget another space heater\nadd insulation to your house
285099
I have electic heat and it can be very costly.  But I also have a wood burning stove.  I average about $100.00 a month in electic including tv's, freezer, refrig, lights, and etc.
994451
Ive never really heard about infrared causing any health problems, but at the same time, it is radiation coming from those little things (miniscule if im not mistaken). I think you'll be ok as long as your not like, pointing the remote control at your eye and pressing the button day or night.
188114
Passive Infrared Motion Detectors- These detectors are also known as PIR detectors. The technology they utilize is “passive infrared”. The device is mounted on a wall or in the corner of a room. It sends invisible fingers out into the covered area in several layers.\n\nThe top layer goes the furthest and averages about 60 feet straight ahead and 35 feet on the sides.The center layer of beams spreads the area about mid way and the bottom layer sweeps the room closest to the detector.\n\nThese beams individually measure the infrared temperature of what ever they land on and look for a clash of temperature against that point. For example if a beam lands on your couch and knows what temperature it is, when you walk in front of the couch your temperature is different and causes a violation. You would be hard pressed to match the temperature of everything in your home as you walk about and that makes motion detectors hard to compromise.\n\nPassive motion detectors have a microchip in them that will adjust the device for slow and methodical temperature changes. This way as your room warms up and cools down during an armed alarm period, you will not get a false alarm.\n\nSome motion detectors are designed to be mounted in the ceiling and spread a 360-degree cone downward. Some are recessed to replicate an electric outlet and various other combinations are available for the James Bond like clients. Most often the device is an aesthetically pleasing small device that is mounted 5-7 feet high in the corner of a room.\n\nPassive infrared motion detectors will not see through walls or windows as they will consider touching one of them as their final destination and begin calculating the temperature. The beams project forward only and will not bend around corners. If your device is placed where a beam can go into an area with an opened door, it will protect the interior of that area as well. Once the door is closed the beam will terminate on that door.\n\nMotion detectors are not going to protect every square inch of your home or business unless you invest in many of them to accomplish that. Instead you should intelligently place them as an interior trap in an area or areas most likely to be violated by the creep or creeps that want to take your belongings or worst off violate you personally. Usually one placed properly on the main floor and one on the lower level if you have one, will serve as good traps. Stairways are often a good thing to consider when placing the device, due to the fact that you will prevent unauthorized passage from one floor to the next.\n\nSee linked article for more info such as how some motion detectors are "pet immune".
623319
Copper is a tricky one, as there appears to be true demand from China and not that many new ways of digging up significantly more ore.  It might be that people who rely on copper decide to find ways to get around using copper.  Maybe aluminum cable instead?\n\nIn the case of zinc, there is a special price level maybe 10% or so above where it is now, where it is worth melting US pennies (which are 97.5% zinc).  At this price the zinc and copper in pennies becomes worth more than one cent per penny, plus the energy needed to melt it down.  There will then be a huge amount of illegal melting of pennies and demand will be satisfied for awhile.\n\nIn summary I think copper might be higher, but there is a lot of uncertainty due to the various things that could happen, such as a decrease in copper demand.  And zinc price could be limited by penny melting.  I wouldn't invest much in this area personally.
940199
those thermal imagers are state of the art. you do not have enough money to develop a product to outsmart the product. Stay away from crimes that would require you to not show up on a thermal imager
643126
LOTS!!  A 700 watt panel will run around 1000 bucks after shipping.  The cheaper ones are closer to 600.  Mitsubishi makes a large selection of panels.
929275
You would need the specific heat of the material.  The rate of cooling would be the total energy loss (E*A) divided by the specific heat.  This will be non-linear, and your value would be good for only the specific temperature given.\n\nWatts = Energy/time; one watt = 1 joule/sec.
548010
I haven't been able to find anything low price.  Fajima reccomends Pulse Microsystems software, but it is very expensive.  You might try browsing for "Open-source" (read free) software.  It is often designed for Linux/Unix users, but is also often ported for Windows users.  Just hope that some Linux users are also avid embroiderers.
1073633
i haven't heard of any but quartz is totally neutral so it's a pretty safe bet.
839084
Copper prices (LME) in US$/mt\napril, 28 = 7,285.00\naugust, 31 = 7,647.00\nnovember, 9 = 7,220.00\n\nfuture?\nIn two year, the forecast is =~ 6,220.00
386803
I can't answer your question with absolute certainty, I apologise, but may have something to point you in the right direction...\nThere used to be a show on HGTV called Modern Masters- there was a metal artist on there once, the cut 1/2 inch wide copper strips, wove them into a 'fabric', carefully folded it and placed it into a kiln (1500? 1600? degrees f), he let it soak in the heat for a while (can't remember how long), then took it out and placed it into a water bath.  I think part of the colouring process might have come from the rapid cooling?  The piece had the colours you were looking for, as I recall.  \nI like the sound of what you're doing...hope it all works out for you...
191053
There are lots of technology options, from all sorts of companies in all sorts of countries. My company has one, check out \nwww.compactpower.co.uk\n\nCADDET has a (not very recent - 1998) review of the advanced thermal conversion market, you can download it here\n\nwww.caddet.org/reports/display.php?id=988\n\nJuniper is consultancy that offers a similar report, but at a large cost.\n\nDon't forget to consider pyrolysis as well as gasification.
249911
You wouldn't want a conductor for a heating coil, conductors aren't supposed to heat. You would want a resistor that would generate heat but still conduct the electricity needed. Nichrome Wire is generally considered the best and most common heating element.
457474
check thermaltake and tagan\n\nhttp://www.thermaltake.com/\nhttp://www.tagan.com/
945879
The first method would be to compare you utility bills to see if there is a drastic change (or any) between last year at this time and the most recent bill with the insulation on.  \n\nFor an exact calculation, you need the following:\n\nThe R value of the insulation\nLength of pipe insulated\nTemperature of the water inside the pipe\n\nThen plug them into this equation:\n\nQ=UA(Tinside - Toutside)\nwhere Q is the amout of Btus \nU is the thermal insulation (or lack there of) expressed as =1/R\nTinside = water temperature\nToutside = air temperature (average) where the pipe is installed\nA = the surface area of the pipe\n\nOnce you get that for the insulation, do it once with out the insulation.  For the second R value without the insulation, use a R-value of 0.5.  The two different Q's you get will be the amount of Btu's you saved.  \n\nTo convert that to $, you need to convert the Btu's (Q) to kW.  Divide the Btu's by 3.412 to get watts.  That will be the amount watts you saved at your hot water heater/boiler or whatever is heating the water (assuming it is electric).  You then look at your electric bill to determine the cost $/W or $/kWh.  Take the number you got for watts and convert to kilo Watts by dividing by 1000.  Then multiply it by the cost off of you utility bill for $/kWh.  \n\nThis is all for a one hour period.  You need to calculate that for a month, day, or year (720, 24, 8765 hours respectively).  You now have what your savings for this project was.
137298
http://www.albireo.ch/temperatureconverter/