Quick Question About Heat the Volume of Water

  • Thread starter Ontophile
  • Start date
  • #1
15
0
Two questions

1) Say you had a small boat with no motor or paddles; no propulsive device save the one I'm about to describe: mounted on the boat's outer hull and submerged in the water, there is a water-heating-mechanism at the bow and a water-cooling-mechanism at the stern. Since heat makes water contract and the absence of heat makes water expand, would these heating- and cooling-mechanics propel the ship forward?
 
Last edited by a moderator:

Answers and Replies

  • #2
291
0
Two questions

1) Say you had a small boat with no motor or paddles; no propulsive device save the one I'm about to describe: mounted on the boat's outer hull and submerged in the water, there is a water-heating-mechanism at the bow and a water-cooling-mechanism at the stern. Since heat makes water contract and the absence of heat makes water expand, would these heating- and cooling-mechanics propel the ship forward?
Liquid water does expand and contract at room temperature, but not by much.

My observation:

The cooling system on the boat is going to produce more waste heat than it removes from the water; if that waste heat is "dumped" back into the water near the stern, then the area around the stern is actually going to WARM up, not cool off.
 
  • #3
Drakkith
Staff Emeritus
Science Advisor
20,991
4,810
Also remember that the change in water temperature is going to cause currents going down and up also.
 

Related Threads on Quick Question About Heat the Volume of Water

  • Last Post
Replies
2
Views
766
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
3
Views
569
Replies
3
Views
3K
Replies
2
Views
533
Replies
1
Views
653
Replies
3
Views
1K
Top