Potable water heat exchanger

Abstract

This indirectly heated potable water tank makes available an appliance meeting all the requirements for safe potable water and gives the consumer a device with a high continuous output of hot water, even when demand is high. The improved device contains the following improvements: (1) vented double sided metal sheet heat exchangers which result in a significant increase in the temperature of the water, (2) vented heat exhanger tubes as a further means to heat the water, (3) a corrugated metal heat exhange sheet in the vent space to transfer heat through its surface to the water, and (4) a vented potable water temporary storage reservoir where the heated reservoir walls additionally heat the stored water. The properties of the sheet heat exchangers result in a very large inner and outer areas of heat exchange in contact with the water to be heated and the heating fluid and in a narrow inner flow space heating surface and large heat exchanger plates which results in the highest heat extraction from the externally heated water.

Dependencies are inferred from the claim text.