Proposed Domestic HotWater Storage System with PLC Control

The major problem the world facing these days is mainly concentrated in the shortage of water and energy resources. Renewable water resources and renewable energy resources are not capable yet to cover this shortage. Scientists are working hard to reduce the energy losses and increase systems efficiencies. As it is well known, the main losses of water and energy are found in the third world countries because of the poor technology available in these countries. In the goal of achieving reduction in energy and hot water consumption, this paper proposes a hot water management and control device (HWMCD) for the domestic hot water systems. The device is based on different temperature, pressure, and level sensors, check and solenoid valves, and pumps, integrated with PLC controller. The device has a monitoring ability of the available water for management purposes, and temperatures in the hot water tank to maximizing the solar energy gained from a solar collector, and managing the available hot water to maximize the amount of usable hot water delivered to the consumers. In this way, a reduction in hot water and energy consumption, and a maximum energy absorption from the sun will be will be achieved.