###### Abstract
The equipment uses heat pipes to capture thermal energy from the residual fluids transiting the evaporator zone and transfer it to the cold water transiting the condenser zone. The efficiency of the heat exchanger was tested in 9 scenarios by varying the temperature of the primary agent to 60, 65 and 70 \({}^{\circ}\)C and the volume flow rate of the secondary agent to 1, 2 and 3 L/min. The temperature of the secondary agent and the volume flow rate of the primary agent were kept constant at 10 \({}^{\circ}\)C and 24 L/min, respectively. The results were later validated through numerical simulations. This process confirmed that the equipment can easily recover waste thermal energy from used water with low and medium temperatures at very low costs compared to the traditional heat exchangers. The results were promising, revealing an efficiency of the equipment of up to 76.7%. On the same topic, the increasing demand for energy due to comfort requirements in the built environment, coupled with the development of road networks and the amplification of the heat island effect call for a comprehensive approach that can answer both issues. The lifespan of an asphalt layer is affected by surface temperature. The study of [PERSON] et al. [9] showcases the feasibility of heat recovery and its effects in terms of energy harvesting efficiency and asphalt surface temperature by creating a numerical model and validating the model based on onsite measurements at a laboratory scale. The experimental setup was developed at the Technical University of Civil Engineering in Bucharest, and measurements were monitored during the summer. The heat recovery system used for this study was made of copper pipes, and its material cost and layout optimization need to be addressed in future studies. The numerical model was validated using measured data. During this study, the authors obtained favorable results in terms of heat recovery, reducing both surface temperature and the selection of system materials. Heat transfer and its practical implications are of the utmost importance when storing electrical energy. In this context, supercapacitors (SCs) are electrical energy storage devices which have the peculiarity of storing more electrical energy than capacitors and supply it at higher power outputs than batteries. This, together with the fact that SCs are endowed with high cyclability and long-term stability, makes them very attractive devices for electrical energy storage. Thermal transfer around a novel arrangement of a module of five rows of SCs is discussed in the study of [PERSON] et al. [10]. A mixed aligned/staggered configuration is studied with the aim of exploring a new possibility that can improve heat transfer more than the other configurations previously studied in the literature. The maximum SC current rate current is 84 A, and the maximum temperature is 65 \({}^{\circ}\)C. The module undergoes both charge and discharge cycles. The current tests are performed up to 50 A for natural convection and up to 70 A in instances of forced convection. For the natural convection case, the SC located in the center of the module is the most critical from the temperature point of view, and the temperature evolution shows the necessity of a cooling system. The relative temperature reaches 27 \({}^{\circ}\)C for 50 A, and the permanent regime cannot be reached with a current greater than 50 A. Thereafter, the impact of position and current on the temperature of SCs in forced convection is examined. The airflow mean air velocity is 0.69 m/s. The temperature of the SCs located on the third and fourth row is very close. However, the last row is the least cooled. This low temperature rise can be explained by the change from an aligned to a staggered arrangement between these rows. Compared to the natural convection case, a significant decrease is observed for the relative temperatures. The difference between the highest and lowest temperature augmentation also decreases, but still remains high.