Pool heat gain by solar radiation versus heat loss by evaporation

In summary, the conversation discusses the use of a pool cover to reduce heat loss through evaporation. The speaker mentions that 70% of heat loss is caused by evaporation and that 85% of solar radiation can heat an uncovered pool. The speaker uses 22mm thick black EPE panels to cover their pool and is unsure if it is better to cover the pool or leave it uncovered on a sunny day. They also mention a transparent foil cover as an alternative but note its difficulty in removal and unsightly appearance. The speaker has noticed their pool is warmer since using the EPE panels but is still unsure of the best course of action for a sunny day.
  • #1
2
0
Hi,

On various websites I read that 70% of the heat loss of a pool is by evaporation, whereas up to 85% of the solar radiation can heat an uncovered pool.

We use 22mm thick black color EPE panels to cover our pool.
On a sunny day, is it better to cover the pool or to leave it uncovered ?

In other words ;
Is the reduction of heat gain (because of the EPE panel cover) compensated by the reduced heat loss by evaporation ?

Thanks for your help

Chris
 
Science news on Phys.org
  • #2
How about using a transparent foil cover? It let's the sun in, and keeps the vapor inside.
 
  • #3
Hi A.T

thanks, but I've had one of those before. there difficult to remove and you need an ugly big roll beside your pool.

Since I've been using the EPE panels my pool is a lot warmer too.
I just cannot figure out whether it's better to cover the pool during a sunny day or not

rgds

Chris
 

1. How does solar radiation affect pool heat gain?

Solar radiation is the primary source of heat gain for a pool. When the sun's rays hit the surface of the pool, the water absorbs the energy and warms up. The more direct sunlight the pool receives, the greater the heat gain will be.

2. Does the color of the pool's surface affect heat gain by solar radiation?

Yes, the color of the pool's surface can significantly impact heat gain. Darker surfaces absorb more solar radiation and therefore result in higher heat gain compared to lighter surfaces. This is why many pool owners choose to have dark-colored surfaces to maximize heat absorption.

3. How does heat loss by evaporation differ from heat gain by solar radiation?

Heat loss by evaporation is the process of water molecules escaping from the surface of the pool in the form of vapor. This process occurs when there is a temperature difference between the water and the surrounding air. Heat gain by solar radiation, on the other hand, is the absorption of energy from the sun's rays. While both processes affect the temperature of the pool, they are fundamentally different.

4. Can pool covers reduce both heat gain and heat loss?

Yes, pool covers can help reduce both heat gain and heat loss. By covering the pool, less solar radiation can reach the water, resulting in lower heat gain. At the same time, covers also prevent evaporation, which can significantly reduce heat loss. Using a pool cover can help maintain a consistent temperature and reduce energy costs for heating the pool.

5. Is pool heat gain by solar radiation a renewable energy source?

Yes, pool heat gain by solar radiation is considered a renewable energy source. As long as the sun continues to shine, the pool will continue to receive heat from solar radiation. This is in contrast to traditional heating methods that rely on non-renewable resources such as electricity or gas. Utilizing solar radiation for pool heat gain is a more environmentally-friendly and sustainable option.

Suggested for: Pool heat gain by solar radiation versus heat loss by evaporation

Replies
3
Views
307
Replies
6
Views
201
Replies
2
Views
1K
Replies
14
Views
1K
Replies
3
Views
911
Back
Top