How much energy does a hot water pipe lose?
Any object that is hotter than its surroudings will transfer energy to the surroundings. So, if you have a pipe carrying hot water from one place to another (e.g. from a hot water tank or boiler to your taps) some of the heat energy the water contains will be lost.
Normally, heat flows from warmer objects to cooler objects just as water naturally flows from high places down to lower places. If you want to force water to move upwards, you need to use a water pump. Similarly, if you want heat to move ‘uphill’ (i.e. from a cooler place to a warmer place) you need to use a heat pump. A refrigerator is basically an insulated cabinet containing a heat pump. Heat is continually leaking into the refrigerator (because the interior is cooler than the exterior) so the heat pump has to continually force this heat out again.
This article contains a list of simple low-cost / no-cost techniques for saving energy in the homes and offices. Not all of these techniques will necessarily be appropriate in all circumstances – the aim was to make the list as broad as possible.
CPUs are getting faster, hotter (and noisier due to more powerful cooling), and they consume more and more energy.
Most of the time processors are idling, so why not reduce their speed and voltage? This is where Cool’n’Quiet technology comes in. It allows the system to dynamically and automatically select CPU voltage and speed, depending on performance need. These changes can happen up to 30 times per second.
All AMD Athlon 64 CPUs have Cool’n’Quiet technology . You just need to enable it…