Common sense recount us that eliminate unnecessary discharge will save energy . However , arrange this possibility into exercise is not as square as it sounds , especially when humidity control is a fundamental requirement .
This article outline a mere way that you’re able to understate ventilation whilst maintaining the humidity weather condition you want .
Heating and ventilation set - pointsIt ’s quite common to apply a ventilation system lay out - degree which is only 0.5oC above the warming note value , but is there a downside to this coming ?
Well - develop plants and milder spring weather conditions mean most tomato grower have an almost constant need for humidness ascendance .
Reliable humidness control can be achieve by bringing the heating and ventilation set - points very close together and it is quite common for cultivator to habituate a ventilation set - point which is only 0.5oC above the heating time value . Whilst this strategy works well from the humidity control perspective , there are times when it can leave in the pauperization for gamey pipe temperatures just because the vents have opened .
The graphical record in Figure 1 shows an model of when this bump at one of our Focus Nursery sites . Note that the vents have spread even though the humidity is acceptable and the screen is fully closed .
Figure 1 : A graphical record indicating heating and external respiration set - points and the resulting variety
How to negociate set - pointsWhat pace can you take to maintain the climate you require in the most energy efficient way ?
fend off this situation is straight . practice an influence on the respiration temperature so that it increases the exercise set - item when the RH levels in the glasshouse fall .
The suggested options are that as the RH fall from 85 % to 80 % the ventilation set - degree should be increase by at least 0.5oC.
If you control humidity base on HD , the hypnotism is that you should increase the ventilation set point by 0.5oC as the HD rises from 2.5g / m3 to 3.0g / m3 .
Be heedful though , as magnanimous changes in the preferences might lead to unsound control . For deterrent example increase the breathing set - point by 1oC might give good energy preservation but the end result could be miserable control of the nursery surroundings .
Also remember that the screenland should be breach before the volcano are open . This is because covert gapping rent the moth-eaten air trapped above the screenland fall into the glasshouse ; and this has the same effect as opening the vent . With this in thinker you should always review your screen ascendancy context alongside your external respiration set - points .
Simple action save energyThis is an example of how attention to item can give energy savings with little effort and at no toll . Regularly review your graphs to see what is really happening in your greenhouse and make the changes ask to keep the environment you want in the most push efficient way .
