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  1. Peltier cells if properly dissipated, have an efficiency of 50-60%, this means that approximately 40-50% of the energy consumed is wasted. Now do not know the efficiency of a compressor type that used in refrigerators. The term energy savings, refers to the entire realization of the terrarium and not to the single cell Peltier. With 80 watts of consumption can refrigerate well a terrarium of 90 liters, reducing the temperature by more than 9 degrees Celsius, the equivalent of less than one watt per liter. To make understandable my project, I put the measurements done and reported on the graph. cool system Warm system By analyzing the performance of the chart, and taking as reference a range of 2 degrees, we can easily derive the phases on and off. Taking the reference of 17.5 degrees we can see the cooling phase that lasts about 40 minutes and the resting phase of 5 minutes. Certainly a compressor refrigerator with gas is more efficient, but also more noisy and cumbersome, not to mention the installation and the cost. However, my project is based on obtaining the maximum energy savings by using an electronic solid-state, with the least possible noise .
  2. Hello, this is my new project of universal terrarium. I want to share my very positive experience with the construction of multi-purpose terrarium, all controlled by electronic thermostat. For the refrigerant I used a Peltier cell, for the warm part, we used a heating cable. For the walls of the terrarium I used extruded polystyrene panels and front with double sheet of plexiglass. I will update the topic step by step, to be lighter on the initial topic. My project schema : cool Warm cooling assembly diagram A) tank with pump B) water cooler C) cooling fan D) rubber tube E) Peltier cell block: peltier + heatsink + water block F) internal fan G) double glazing plexiglass H) polystyrene slab Prompt
  3. Some of the advantages of LEDs are: equal lumens consume about half of the current of other lamps not require reflectors because the cone of light is about 140/150 degrees the distance from the plants can vary, just add or remove additional lenses The cost of a 10-watt LED is now less than a CFL lamp The brightness can be adjusted according to the needs The supply voltage is low voltage and is not dangerous The light emitted is devoid of heat, the only heat emitted is on the opposite face of the light beam their brightness decreases over time (we're talking 50 years and older) The disadvantages are: require an electronic driver (only for power LED) require a heatsink the spectrum of white light, not cover all the frequencies I hope I have been of help to your reflections Ciao Prompt
  4. It is sufficient that cover only the contacts with silicone or with varnish or nail enamel. For the body of the LED does not need any protection. Prompt
  5. I use LEDs without protection with humidity around 80%, it never happened a problem. From my experience, the moisture in the air does not create any problem to the electronics, while the condensate is more insidious. The LEDs still operate at low voltage, and then pure water and moisture do not create damage. If the water is rich in salts, then the question changes. Prompt
  6. Follow the indications of the mobile, the heat is very dependent on total power strips. Also, the more the temperature of the led chip is high and more their efficiency decreases. Another important factor is the power supply, the LED strips are manufactured to operate at 12 vdc stabilized. If the plants do not take color, it means that they do not receive enough light, so you can buy lenses that reduce the cone of light from 120/140° to 80 ° / 60 ° degrees or approaching the plants to the LEDs (, in according to the size. Prompt
  7. Not only for Nephentes, you can also cultivate other species under this light intensity Prompt
  8. If you use only linear fluorescent lamps and / or CFL, you need a power of about 400 watts / 450 watts. Prompt
  9. Hello Vincent, hygrometers measure the humidity from 0 to 100%, I have seen no hygrometers that measure different moisture. We growers do not need professional hygrometers, most of us, use digital hygrometers low cost found in any oriental shop, supermarket or electronics stores. I use a digital thermometer/hygrometers with probe, paid 8 euro. Prompt
  10. If you write the area you want to illuminate I can tell you how many total watts are needed. Prompt
  11. The lack of color is due to many factors, the most important: Distance light plants Type of light is not suited to plants I suggest you put the cfl phytostimulants, especially with accentuation of the red band. Prompt
  12. Yes, you can put it to 1.5 meters, RE: Valcarnivores but then you need to cover all the surface with a consumption of 130 watts? It is better to opt for a different lamp? If you write the area you want to illuminate I can tell you how many watts are needed. Prompt
  13. hello, for highland nepenthes are too much, for these plants are sufficient 9000-10000 lux. A lamp that exceeds 10,000 lux may burn your nepenthes, I suggest you buy a lamp where you can adjust the light output. It is also not very correct measure in lux led blue and red, the lux is recommended for white LEDs. Ciao Prompt
  14. Hi Mobile, The Peltier cells are efficient only if liquid cooled, I have made some ​​very interesting tests with terrariums not insulated, you can see them here, : "" before long my next test will be on a new type of terrarium insulated, which will no doubt be much more efficient. Prompt
  15. here are the pictures, 14Watt ceiling lamp with 5050 smd led :)
  16. Prompt

    plants under 5050 smd led

    plants under 5050 smd led