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Bachelor thesis:Design of Algorithms for Electric Water Heater ( PDF )
Author:Hubík Martin
Supervisor:Ing. Ondřej Novák
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Abstract:The main goal of this thesis is to present a method of approximation of the amount of hot water stored in domestic water storage heaters based on analyzing information from electricity meters. Only the heaters that are powered electrically and are controlled by remote control signal provided by electricity distributor are considered. Results from simulations show that the value of the real amount of hot water lies within the interval (-72,~72)~[l] around the current estimate with the probability 0.95. This result was obtained from empirical distribution of an error of the estimate. Deviations from the actual value are predominantly due to the stochastic nature of hot water consumption in dwellings. The process used to develop the estimate incorporates following steps. We need to find out at which phase the heater is connected and what nominal power input it has. We need to detect periods when the heater is on. By knowing the above information, we can approximate the average hot water consumption over a desired period. We then take typical daily hot water consumption as a function of time and adjust it with respect to approximated overall consumption. By knowing at which period the heater is on and how much hot water is being used at a particular time, we can approximate how much water is left in the tank, which is the desired result.
Submited:May 2013
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