In the case of heating the water of your pool, your pool boiler installation engineer will advise there are two kinds of systems you can choose from two types of systems: Primary and Secondary.
A basic system allows bathers to set thermostatic controls at a particular temperature generally between 22degC and 30degC. The heating system then continue to operate until the bath water is at the desired temperature, regardless of any external influences (i.e. temperatures, weather or sunlight etc.)
A secondary system can increase the temperature of water, however it is dependent upon external elements. Secondary systems are generally not able to guarantee the water temperature will be at the temperature desired and, being such, are typically utilized as a backup to the primary system.
If used together when used in conjunction, a primary and a secondary system can yield significant savings on operating costs. This is due to the fact that the secondary system kicks into action when external forces favor it and secondary system can step in when external circumstances are not.
Air-source heat pumps are an excellent illustration of this. If the weather is pleasant and the temperature of the air is high, these heat pumps function very effectively as a backup system. However, if the weather is bad and the temperature of the surrounding area is cooler and cooler, the heat pumps will not perform as efficiently. To counter this the problem, a gas heater (primary system) can be utilized to make sure the desired temperature is attained.
Primary Heating Systems
Here are a few primary heating systems that can be utilized to provide heat to the swimming pool.
High-performance fuel oil boiler for high performance
In a pool with a dedicated heater, domestic fuel oil is burned to heat the fluid in a closed loop until the highest temperature. The heated fluid circulates through a set of titanium or stainless tubes, which come in contact with the pool’s water and heat it up.
Advantages:
The source of heat is always at hand, regardless of the weather.
Rapidly warms pools.
Could be an opportunity for investment, especially in the event that the existing boiler is near that pool’s system.
It is a perfect fit with other systems (i.e. renewable energy systems that are secondary to the primary system).
Disadvantages:
The running costs are relatively high when being used as the sole source of heat.
The power source is fossil fuels, resulting in an enormous carbon footprint.
The rising cost of fuel oil.
High-performance gas boiler
High-performance gas boilers operate exactly the same way as an oil-based fuel boiler, but utilize natural gas or LPG and butane for the primary source of fuel.
Advantages:
The same benefits as the boiler that uses fuel oil (above).
Gas boilers are small and require only a small amount of space.
Emissions reductions from oil boilers.
Disadvantages:
The running costs are relatively high when employed as the sole source of heating.
If there’s no gas service nearby, cost of connecting can be high.
Note The Propane (LPG) and butane solutions have the same benefits in comparison to natural gas, even if gas supplies are not readily accessible in your area. However, the operating costs are about 280% more expensive, which means they are very expensive to operate when compared to natural gas.
Air/water heat pump.
As fossil fuels continue to be rising and heat pumps gaining significant media attention for their eco-friendly credentials as well as highly efficient performance. These are now becoming increasingly popular option for heating swimming pools.
How do they function
A heat pump that is air-to-water absorbs warmth from the atmosphere, and transfers it to the pool’s water. The air around you doesn’t need to be warm, even cold or cool air contains heat energy in it, which a heat-pump is able to extract. However, the more warm the air and the higher the temperature, the more energy the pump is capable of capturing and the more efficiently it can operate.
Natural energy generated by the surrounding environment is absorbed into the heat pump through the large fan. It is then absorbed by the heat pump’s initial heat exchanger, referred to as an evaporator, that is made up of a highly conductive frigerant cold liquid. A second pump is utilized to move the the heat pump and allow that the fluid to absorb in the surrounding air. When this happens the liquid transforms from cold liquid to the cool vapour.
The cool vapour is then passed through a compressor, which compresses it and dramatically raises its temperature. The hot vapour now is then pumped through a pool water heat exchanger, where the heat transfer to the pool’s water, which heats it up. After it has released its heat the hot vapour cools into the cool liquid, then going by an extension valve to transform to an icy liquid and starting the cycle.
The reason they’re great
The most notable feature of heat pumps is that they can generate more energy from heat than they use during their operation. This is called the ‘coefficient of effectiveness’ (COP) and explains the reason why heat pumps have more than 100% COPs..
A good example is an air conditioner with an COP of 5 indicates that it will draw 5 kWh of air heat for every kWh that it uses in power to operate. That’s effectively an output of 500 percent.
The most recent generation of air-to-water heat pumps, including those we have in our pools, can achieve COPs ranging from 5.22 to 5.73 (i.e. 52 percent efficiency and 473% output). In comparison to the maximum COO value at 1.09 in modern boilers using gas, it’s difficult to understand the reason why heat pumps are growing in popularity.
Advantages:
A low-cost system that offers a high return on investment when compared to heating systems that use fossil fuels.
Full-scale primary heating when the capacity of output is +0.35 kWh per m3 of pool water.
Excellent ecological credentials, and ideal for creating an energy-separate pool using photovoltaic panels.
It works by utilizing the heat of the air around it, which means it can heat your pool even when the sun doesn’t shine.
It is possible to heat water at night, and use electricity at lower prices at night.
Disadvantages:
It’s usually not feasible to utilize a heat pump to warm the water so that you can bathe in winter because its efficiency decreases as the temperature falls below 10 degrees Celsius.
Its benefits are vast, however, they are difficult to convey to an average person.
How do you choose the right heat pump?
Choose a model that has a the titanium exchanger. This type of material provides the highest heat transfer and is essential to the effectiveness of your heat pump. It also is resistant to most of the chemicals employed to maintain the water quality of the pool.
Request COP values of 15degC temperature. The top air-to water heat pumps have COPs of at minimum 5.2 for this particular temperature.
Request a written guarantee for five years. The minimum legal requirement is 2 years, but since components such as heat exchangers are expensive to replace, the best companies back their products with a longer guarantee.
Beware of products that are cheap. Although the initial price may be appealing, you’ll ultimately in the red in the event that the product fails or gets less effective over time.
Secondary Heating Systems
Solar panels
Solar panels collect the sun’s rays and, by using liquid, store the energy in the primary circuit. They convert this energy into heat using an exchanger before sending the energy into the water in the pool. Because they utilize the natural resources of the earth and are among the most widely-known types in renewable energy.
Advantages:
Frost-free system thanks to the addition of glycol to the primary circuit.
Aesthetic designs.
There is a relatively small area required as compared to similar solar system (i.e. 12-14m2 needed to heat 50m3).
Use diffused light, as well as the sun.
Disadvantages:
It is a very expensive system that takes an extended time to reach break-even (at minimum 12 to 18 years).
A costly heat exchanger plate is required to ensure yield in the months of spring and autumn.
Despite the investment being high it is able to achieve the expected results under ideal conditions (30deg slope that faces to the south).
EPDM PET Plastic or Rubber Sun Mats
The sun mats are able to be put on flat roofs or sloping roofs in the event that there is enough room. The majority of manufacturers recommend that 67 percent of the area is a suitable mat area. However, we believe that this is not true based on our experience, we suggest 100 percent is more realistic, and 150% is the more suitable area.
These mats absorb the pool’s water and then heat it up with their heated-up plastic covering. Simple measurement and control technique is used later to heat the water in the pool.
Advantages:
Heating system that is affordable.
Simple technology.
Aesthetic because of the installation on flat roofs.
Break-even period is limited (3 or 4 years).
Disadvantages:
Not the most attractive on sloped roofs.
Receptive to storm-related damage.
Only work only when the sun is shining.
Block any work that is needed to be repaired to the roof.
Do not permit temperatures of the pool to be controlled.
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