Heat pumps, specifically brine-to-water variants, provide an efficient alternative to traditional methods of heating and cooling production. These systems are versatile, accommodating various demands such as space and ventilation heating, cooling, and domestic hot water (DHW) production. However, the installation of brine-to-water heat pumps in existing buildings without hydronic distribution...
Achieving accurate performance forecasting of borehole heat exchanger (BHE) is essential for optimizing ground source heat pump systems, enabling optimal control, and facilitating energy-efficient operations with enhanced sustainability of the built environment. It is challenging to eliminate redundant input sensors without compromising the accuracy of the deep machine learning models. The...
Microgrids are considered as the crucial element in the integration of various distributed energy resources in buildings. They are capable of operating in both grid-connected and islanded mode and have shown immense potential in absorbing renewable energy. However, the widespread implementation of intermittent renewable energy sources, coupled with variable electricity pricing, has...
Further investigation is required into the operational performance of a trans-critical CO2 heat pump when integrated with various energy sources, such as shallow geothermal and solar thermal collectors. However, conventional physics-based models of this system demand substantial computational resources when employed for operational optimization. To allow faster system simulations, a surrogate...
The increased interest in hydrogen as a versatile and environmentally friendly energy carrier has led to its recognition as a potential solution for addressing environmental concerns and challenges associated with transitioning to alternative energy sources. However, working with hydrogen requires careful consideration of safety measures to ensure the safe handling, storage, and utilization of...
Underground natural gas storage (UNGS) is a means to store energy temporarily for later recovery and use. In such storage operations, carbon dioxide (CO$_2$) can be injected as cushion gas to improve the operating efficiency of the working gas and then be permanently stored in the same reservoir. A potential obstacle for widespread use of this technology is that the mixing of the different...
The present research dealt with the numerical simulation of nanofluid flow in a pillow-plate heat exchanger. Al2O3-water nanofluid and water are considered to be working fluids. A two-phase mixture model was used for flow simulation. The effect of the geometry properties on the hydrodynamic and thermal performance of the heat exchanger was studied. Next, the focus was placed on using...
