Buy Peltier Unit
The first real advantage that thermo-electric dehumidifiers have over compressor based or desiccant dehumidifiers is in the fact that they produce very little noise, even less than desiccant dehumidifiers. The only part of a thermo-electric dehumidifier that produces noise is its fan. As we described above, on most units this is nothing more than a small brushless fan.
buy peltier unit
Compressor based dehumidifiers have a compressor and much larger fans which produce much more noise. Desiccant units have large blowers that produce more noise than the small 12V fans found on thermo-electric dehumidifiers.
Most thermo-electric units are rated to remove between 8 and 20 ounces (0.5 to 1.25 pints) of moisture per day. Compare this moisture removal rate to 15 to 20 pints per day for the average residential desiccant dehumidifier and 50 pints per day for the most popular compressor based dehumidifiers. A thermo-electric dehumidifier is simply not an option if you need humidity removed at a high rate. Only use one of these dehumidifiers if you have the patience to let it dehumidify over very long periods of time.
I have a 450 sq ft camper. Im looking for either one compressor unit or 2 Thermo electric units. Which one would you recommend for being in different environments and the least amount of noise. Also have to consider the separate areas of the camper as far as rooms
I have noticed that at least one manufacturer (Vremi) claims that their large-capacity units (30 and 70 pint/day) operate using Peltier cooling. I have been trying to get clarity on whether this is in fact correct, but nobody (in the massive Amazon community, or so far from Vremi customer support) has been able to give me a straight answer so far.Is this credible now (6/19)?
Yes, the dehumidifier should work very well for the application you specified if you position it the way you specified as long as its a high enough capacity unit. We recommend a 70 pint unit for the square footage you specified.
500cu ft, equals about 8x8x8ft,This would be about the size of a regular bathroom.A peltier dehumidifier does an excellent job in a small bathroom.However if the room is not very humid, it would make sense to run this on a timer, and only a couple of hours a day.
We have plans for units that use an aquarium air pump to circulate air from the top of an engine into a silica gel, then back to the bottom of the engine crankcase. Moisture is from combustion blowby, so internal relative humidity is low at shutdown, then rises as the engine cools until it condenses on the metal and drips into the oil, where it is slowly released with diurnal heating and cooling. Users claim an internal relative humidity of less than 15%.
They differ from the peltier dehumidifiers above as they use a built-in compressor to cool down the coils as opposed to just the electric current from your mains. The compressor allows for coils of a much larger size to be chilled, and this larger surface means a lot more water can be condensed and collected.
We recommend looking at the energy factor of your dehumidifier, which is the number of litres of water it removes from the air per kilowatt hour (kWh) of electricity used. The more it removes per kWh, the more efficient your unit is.
If you are worried about the cost and only need to dry a small space, mini dehumidifiers typically cost between 30-60. These are referred to as peltier or thermo-electric models and will extract anything from 200ml to 1 litre per day. They also use very little electricity - making them cheap to run.
The peltier plate in a standard portable thermoelectric cooler consumes 3-5 amps. It is capable of temperatures that are about 40 degrees Fahrenheit lower than ambient temperature. This means, for example, that if your cooler is sitting outside on an 80 degree day, the coldest it can get is 40 degrees. Unlike refrigerators, thermoelectric coolers are only capable of differential cooling -- the hotter it is outside the warmer your cooler will be inside.
PRO: Thermoelectric coolers last a long time. At some point, the peltier plate in a thermoelectric cooler will wear out, but it shouldn't be for a very long time (years of use is probable). In fact, many truck drivers buy and use one single thermoelectric cooler daily for years at a time. They'll work just fine for occasional use camping, boating, etc.
CON: Thermoelectric coolers can't get wet (inside or out). Regular coolers - as well as most portable refrigerators - work just fine if they get wet inside. You don't have to worry about ice melting and ruining either. But if you put some ice inside your thermoelectric cooler, and that ice melts, it can damage the peltier plate in your cooler and ruin it.
Until fairly recently, almost all refrigerated laboratory incubators used a compressor-based cooling system. While these systems are still very prevalent, some units now use a Peltier cooling system instead. Each of these types of systems comes with its benefits and drawbacks, including those related to cost, performance, and practicality.
Peltier systems require more energy input than comparable compressor-based systems. However, while heat is emitted from Peltier systems, it is comparatively less than in compressor-based systems. This means that there may be some savings in terms of air conditioning load in the area where the unit is housed, which could help offset the energy efficiency differential.
Compressor-based cooling involves the use of vapor compression to cool a unit. This is the most commonly used type of cooling system found in both domestic and commercial refrigeration systems. Indeed, most of our refrigerators and freezers, as well as other refrigerated systems, including cooled lab incubators, use a compressor-based cooling system.
In the emergency medicine, icing has been used as first aid treatment to the patient of head injury. By reducing cerebral temperature, prevent the generation of secondary brain damage such as discharge of neurotransmitter, and the reaction of free radical. The average boarding time is 15 minutes in an ambulance, however by icing treatment quantitative temperature control is very difficult as it always occur insufficient cooling or excessive cooling. Icing for 30 minutes or more has the danger of frostbite. As an other problem homeostasis, which happens when icing is stopped is suggested. Therefore, the issue is how and quickly cools an injured head without generating any secondary damage. In this study, we have developed a cooling unit using Peltier device. A Peltier is a thermo-electric semiconductor device that generates heat surface on one side and cool surface on the other, when passes electrical current. By adjusting passing current, heat controlling can be made easily. Other advantages are small size, light weight, vibration and noise free. A Peltier device is also harmless to the environment as it does not use any material like Freon. We have fabricated a helmet type unit that can cool a head from the surface. As a fundamental evaluation we have investigated electrical properties as well as cooling ability, and response time. The result of our investigation showed a uniform electrical properties without getting any interference of ambient temperature while use water as heat radiation coolant. An 80 watt device (39.6mm X 39.6mm X 3.94mm) is found sufficient to cool a helmet around 15 degree C. Only 30 second is necessary to reach the expected temperature when direct-current stabilization power supply of 11V-15V was used.
Peltier cooler usage for air temperature control in space and medical engineering is considered in this paper. The Bradford experience of Peltier unit application in cooling devices integrated in Glove Boxes is generalized. Examples of already existing for space applications designed devices, which use thermo-electrical principle for thermal control, are shown. Simplified engineering methods, which have been proven to be effective in practical applications, are given. For Thermo-Electrical Unit optimization the appropriate computer program has been developed. It has been shown that the optimal condition of power supply of the Peltier elements, integrated in the system (having Water Cold Plate, Air Heat Exchanger etc.), does not coincide with its own optimal condition. Besides the optimal power supplies voltage, there is the optimal amount of Peltier elements, if the heat exchangers characteristics are already known (i.e. the Heat Exchangers operational mode, boundary conditions and dimensions are limited with system requirements). The application of own software and software of the Peltier manufacturer is discussed. The results of a diagnostic experiment are shown also using correlated PC-model.
DESCRIPTION (provided by applicant): The broad aim of this proposal is to develop an advanced tool for neuroscience research that is designed to facilitate critically important systems-level neuroscience research with long term goals of further advancing our understanding of brain function as well as ultimately improving therapies for patients suffering from neurophysiological disorders. The device described here will integrate advanced state-of-the-art technologies into a single, cost effective ensemble single-unit recording/inactivating (lesioning) device. Developing this integrated recording/lesioning tool will facilitate complex systems-level neurophysiology experimentation in small mammals that is efficient, well controlled, reliable, and repeatable. The device will consist of 3 major sub-assemblies: 1) a movable array of 16 ultra-fine wire, high impedance microelectrodes; 2) an ultra-compact microdrive capable of precise movement of the electrodes; 3) a miniature Thermo- Electric cooling unit, built around a commercially available Peltier device, that is capable of reversibly inducing functional inactivation of focal regions of cerebral cortex by local cooling. This device will allow simultaneous ensemble recordings and focal inactivations to be performed within multiple interconnected structures in a neural circuit. This will allow sophisticated systems-level neurophysiological experimentation to be performed that is not possible using other currently available techniques and/or methodologies. The device will be functionally tested in vivo, through a series of experiments, including acute implantation in primary somatosensory cortex of anesthetized rats, and chronic implantation in primary motor cortex of awake behaving rats. Successful development of a device such as this would provide an important new tool for neuroscience research that would have a very wide range of applications that extend from basic neuroscience research to clinical applications. An advanced, state-of-the-art recording/inactivating research device is described that is designed to facilitate our understanding of a number of important questions related to how our brain functions. Understanding these critical neuroscience related questions will facilitate development of improved therapies for a wide range of neurophysiological disorders. 041b061a72