What happens with transistor outside max temperature range?
Suppose I have an IGBT transistor rated for 60A, that has junction temperature range of -55 to 175C. What happens if I do not exceed max current, but I do exceed max temperature? The characteristics in...
View ArticleClik here to view.
Connecting Solid State Relays To AC Heating Elements – Is this circuit correct?
I’m converting a 1500W toaster to a reflow oven with PID control, but I’d like to focus on the hardware aspect. I’ve pulled the switches and controls out of the oven and I’m left with something like...
View ArticleHow do I keep the temperature constant in a Boyle's Law experiment?
I’m trying to get a head start on our lab experiment next week about Boyle’s Law. The set-up is we have an air chamber can immersed in a pot of boiling water (which is kept boiling over an electric...
View ArticleOil temperature for flavor extraction?
A little context: I make craft chili oils for friends and family. I use a two-step infusion process. First, I infuse the oil for flavor with spices. Second, I add dried chili flakes into the flavored...
View ArticleOpen systems (Conservation of Energy): is a temperature change possible if a...
Full question: consider an perfectly thermally isolated cylinder. Water is flowing through this cylinder from the entry to the exit. Is it possible for the water flowing through the exit to have a...
View ArticleMacBookPro temperature inconsistency
I have a 15″ MacbookPro with a Windows 7 Bootcamp partition. I check the temperature when using Windows but I think it doesn’t report the right temperature. I shut down Windows with a temperature...
View ArticleHeating 2 sets of 1L water vs 1 set of 2L water [closed]
Can heating 2 sets of 1L water or 1 set of 2L water have a variation in terms of fuel efficiency? Can one be more fuel-efficient than the other? (migrated from chemistry site)
View ArticleHow to arrange many thermal sensors in series?
Is there a kind of thermal sensor that only changes resistance if it is above 50′C and that can be wired in series? I want to wire 50 thermal sensors on 50 batteries so that i can see if any one of...
View Articlepower failure and a slow cooker
I put a beef stew recipe in to my crock pot this morning at 7 am and set it for 8 hours on low. At 1 pm, the power went out for a few minutes. When power was restored, the slow cooker did not come back...
View ArticleWill a DIY Air Conditioner help my HVAC Central Air system?
So the husband and I just moved to Texas. We went away for the weekend and turned our HVAC central air from 68F and ON to 75F and AUTO. For some reason when we got home the AC wouldn’t drop. Now I know...
View ArticleThe temperature in space is about 3K, however there are almost no atoms in...
My understanding is that heat is essentially atomic vibrations. If there are almost no atoms, how can there be residual heat? Also, as I understand in space there is no heat transfer via convection and...
View ArticleCan a single particle be “heated” by radiation?
From the point of view of statistical thermodynamics, a single particle doesn’t have a phase (state of matter), nor temperature. What would happen if heat is transported to this single particle via...
View ArticleWIll aluminium foil get hot in microoven if I wrap it with paper?
A aluminium foil doesn’t get hot easily because of it’s heat conductivity. Will it get hot in microwave oven if I wrap it with paper?
View ArticleShould I install a doorway fan or dehumidifier?
I have central air in a rancher (one floor), and the living room is on one end of the house. That room is on a slab, and has always been noticeably hotter in the summer and colder in the winter than...
View ArticleTemperature of system in canonical ensemble
Upon reading Reif’s explanations relating to systems exchanging energy and the canonical ensemble (Reif, Fundamentals of statistical and thermal physics, p. 95ff and p. 202ff), I am led to conclude...
View ArticleEquilibrium temperature of closed system
Body X of temperature 0° C is brought into thermal contact with body Y of temperature 100° C. X has specific heat capacity higher than of Y. The masses of X and Y are equal. By my reasoning, the final...
View ArticleFast detection of transient temperature change.. RTD? Thermistors?...
If I want to detect temperature changes on the order of 10ms, what is the best technology to use (besides IR)? I know Thermocouples and RTDs are pretty slow.. not sure about Thermistors.
View ArticleIf a US recipe specifies 'vegetable oil' what type of oil should I use in the...
The recipe requires heating the ‘vegetable oil’ to exactly 375 degrees Fahrenheit with the aid of a candy thermometer. But aren’t most oils made from vegetables? Some have a smoke point less than 375....
View ArticleElectrons and photons at absolute zero?
I know that molecules can’t move at absolute zero (hypothetically of course). But what happens to electrons and photons?
View ArticleTime to decrease water temperature by 5F from different initial temperatures
Is the time to (naturally) decrease temperature of water by 5 degrees the same, regardless of the initial temperature? Imagine 3 glasses of water (a, b c) in a room temperature of 70F. There are 3...
View Article