[TowerTalk] Oil For Dummy Load

[Roger (K8RI) on TT]

True as far as it goes.  Specific heat s based on mass, where volumetric 
gives different answers.  Like using a Hydrogen torch.  It has a 
relatively low flame temp, but because you can get so much of it through 
a small tip, there are a lot of clean BTUs.  As far as useful liquids, 
alcohol beats water, but requires a lot of extra precautions.

Too many HTML tags to sort through below.

73

Roger  (K8RI)


On 12/5/2015 12:55 PM, Patrick Greenlee wrote:
> *Some common specific heats and heat capacities:*
>  Substance      S (J/g0C)      C (J/0C) for 100 g
>  Air      1.01      101
>  Aluminum      0.902      90.2
>  Copper      0.385      38.5
>  Gold      0.129      12.9
>  Iron      0.450      45.0
>  Mercury      0.140      14.0
>  NaCl      0.864      86.4
>  Ice      2..03      203
>  Water      4.179      417.9
>
>
>
>
> *List of orders of magnitude forspecific heat capacity 
> <https://en.wikipedia.org/wiki/Specific_heat_capacity>*SI prefix 
> <https://en.wikipedia.org/wiki/SI_prefix> Factor     Value J 
> <https://en.wikipedia.org/wiki/Joule>·kg 
> <https://en.wikipedia.org/wiki/Kilogram>^−1 ·K 
> <https://en.wikipedia.org/wiki/Kelvin>^−1     Item
> deca <https://en.wikipedia.org/wiki/Deca->     10^1 94     Radon 
> <https://en.wikipedia.org/wiki/Radon>
> hecto <https://en.wikipedia.org/wiki/Hecto>     10^2 120     Uranium 
> <https://en.wikipedia.org/wiki/Uranium>
> 129     Gold <https://en.wikipedia.org/wiki/Gold>
> 130     Iridium <https://en.wikipedia.org/wiki/Iridium>
> Osmium <https://en.wikipedia.org/wiki/Osmium>
> 139     Mercury <https://en.wikipedia.org/wiki/Mercury_%28element%29>
> 145     Iodine <https://en.wikipedia.org/wiki/Iodine>
> 158     Xenon <https://en.wikipedia.org/wiki/Xenon>
> 240     Caesium <https://en.wikipedia.org/wiki/Caesium>
> 246     Ethanol <https://en.wikipedia.org/wiki/Ethanol>
> 248     Krypton <https://en.wikipedia.org/wiki/Krypton>
> 363     Rubidium <https://en.wikipedia.org/wiki/Rubidium>
> 377.48     Brass <https://en.wikipedia.org/wiki/Brass>
> 385     Copper <https://en.wikipedia.org/wiki/Copper>
> 420     Cobalt <https://en.wikipedia.org/wiki/Cobalt>
> 444     Iron <https://en.wikipedia.org/wiki/Iron>
> 480     Bromine <https://en.wikipedia.org/wiki/Bromine>
> Chlorine <https://en.wikipedia.org/wiki/Chlorine>
> 502     Diamond <https://en.wikipedia.org/wiki/Diamond>
> 520     Argon <https://en.wikipedia.org/wiki/Argon>
> 677     Glass <https://en.wikipedia.org/wiki/Glass>
> 720     Graphite <https://en.wikipedia.org/wiki/Graphite>
> 757     Potassium <https://en.wikipedia.org/wiki/Potassium>
> 824     Fluorine <https://en.wikipedia.org/wiki/Fluorine>
> 900     Aluminium <https://en.wikipedia.org/wiki/Aluminium>
> kilo <https://en.wikipedia.org/wiki/Kilo->     10^3 1030     Neon 
> <https://en.wikipedia.org/wiki/Neon>
> 1230     Sodium <https://en.wikipedia.org/wiki/Sodium>
> 1660     Pentane <https://en.wikipedia.org/wiki/Pentane>
> ≈ 2000     Oil <https://en.wikipedia.org/wiki/Oil>
> 2060     Ice <https://en.wikipedia.org/wiki/Ice>(0°C)
> 2100     Coconut oil <https://en.wikipedia.org/wiki/Coconut_oil>
> 3582     Lithium <https://en.wikipedia.org/wiki/Lithium>
> 3767     Heavy water <https://en.wikipedia.org/wiki/Heavy_water>
> 4186     Water <https://en.wikipedia.org/wiki/Water>
> 4700     Ammonia <https://en.wikipedia.org/wiki/Ammonia>(liquid)
> 5193     Helium <https://en.wikipedia.org/wiki/Helium>
> 10^4     14304     Hydrogen <https://en.wikipedia.org/wiki/Hydrogen>
>
>
> Roger, please give a couple examples of things with higher specific 
> heat (heat capacity) than water that are practical for using in 
> conjunction with a DL by typical hams.
>
> While I would never use water to fill a cantenna, a DL with provision 
> for liquid coolant could do well with water as the heat transfer 
> liquid.  Of the commonly available substances in my limited experience 
> only liquid ammonia (as used in old time refrigeration systems) would 
> do better but I HATE AMMONIA so would not go there personally.
>
> Patrick        NJ5G
>
> On 12/5/2015 12:00 AM, Roger (K8RI) on TT wrote:
>> one point:
>>
>> Water does not have high heat capacity, but it's great for 
>> transferring heat.  1 calorie will heat 1 cc of water 1 deg.
>> Heat capacity and the ability are quite different.
>>
>> 73
>>
>> Roger  (K8RI)
>>
>
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-- 

73

Roger (K8RI)


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