Thermoelectric cooling of cabinets with water heat rejection

The cooling of cabinets containing electrical and electronic components that have an air temperature above that of an available liquid is examined to determine temperatures where thermoelectric units increase heat evacuation compared to passive heat exchangers. A nondimensional coefficient is used for the comparison. The useful range of cooling generally corresponds to cabinet temperatures not exceeding that of an available liquid by more than 10K. A thermoelectric air to water cooler that fits into a 19 inch rank is described. It provides efficient cooling for liquid temperatures 5 to 10K below or above cabinet temperature and has the advantage of being static, highly reliable, and capable of operation with any type of water, even seawater