Smart Home Energy Management Based on Renewable Energy Resources

Abstract

The energy management system (EMS) can be used to optimize renewable energy resources and to monitor and schedule household appliances to reduce energy cost and Peak-to-Average-Ratio (PAR). This paper presents a smart home EMS with renewable energy sources and energy storage systems and shows how to use/ sell electrical power from/to the main grid (MG). Detailed information about the electricity selling/buying operation and appliances schedule at each hour during the day are shown. The main objective of the system is to reduce the daily cost and PAR and maximize the user’s comfort. The system achieved a reduction in cost by scheduling the appliances and optimizing the renewable and stored energy. Based on the day ahead pricing of electricity and available renewable and stored energy, the appliances are scheduled. The mathematical models of each component in the system and the daily cost, PAR, and user’s comfort functions are built in MATLAB. All constraints of the system are considered. Multi-objective optimization with a genetic algorithm (GA) is used to solve this problem. The EMS with PV renewable energy source and battery energy storage is applied on smart home appliances (shiftable and non-shiftable). The efficiency of the scheduled appliances is measured by the electricity cost. The results show that the system helps to reduce the electricity cost and PAR.

Thermal Performance of Earth Air Heat Exchanger for Geothermal Energy Application in Hot Climate using CFD Simulation

“…The effectiveness of EAHE expressed as the following equation [2] 𝜀 = 𝑇 𝑎𝑖𝑟 𝑖𝑛 −𝑇 𝑎𝑖𝑟 𝑜𝑢𝑡 𝑇 𝑎𝑖𝑟 𝑖𝑛 − 𝑇 𝑠𝑜𝑖𝑙 (15) In addition, the coefficient of performance COP is investigated by calculating the heat capacity (q) as follow [2] 𝑞 = ṁ× c p × ∆T (16) where ṁ= the mass flow rate of air in kg s c p = spesific heat of the air in kJlkg. K ∆T = air temperature difference between inlet and outlet.…”

“…Global energy security is one of the key concerns as it depends on the concentrations of the energy supplies political pressure from energy exporters [1]. The energy management system (EMS) can be used to optimize renewable energy resources as well as monitor and schedule household appliances to save energy costs [2]. Importance of studying renewable energy and employ its advantages to cope with climatic changes is significantly expanding.…”