Persona: López-Rey García-Rojas, África
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López-Rey García-Rojas
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África
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Publicación Pico turbines, the solution to self-supply energy to the water supply network. A case study in Las Palmas de Gran Canaria(Elsevier, 2021-08-15) Borge-Diez, David; Godoy Deniz, Juan Manuel; López-Rey García-Rojas, África; Colmenar Santos, AntonioThis paper describes the integration of the pico turbines in the drinking water network of the city of Las Palmas de Gran Canaria (Spain). World's drinking water supply companies need updates his infrastructure and technology to turn existing networks into smart water networks, to preserve people's health by ensuring the potability of water for human consumption. The essential parameters for water quality (such as chlorine level, pH, turbidity and others) can be easily measured using sensors inserted in the pipes and in the storage and distribution tanks. Access to this information in real time and immediate action is essential to ensure the health of the people who access this vital element. It is therefore essential to increase the number of sensors and the analysis of the data they provide in order to detect anomalies, correct them and anticipate their consequences. Some of the objectives are the correct measurement of meters to detect leaks and anomalous consumption, saving water and energy, avoiding water and air pollution, achieving efficient supply to the consumer and achieving profitable, efficient and environmentally sustainable urban hydraulic systems. All systems require power, the pico turbines inserted in the network can supply power without affecting the normal operation of the network. Pico turbines are highly efficient, low cost and easy to install systems, but they are not widely used. The case exposed in this city could be replicated in many urban systems, it is novel that there is no literature of massive applications, existing a wide capacity of implantation and development of this technology. When it seems that the locations for the installation of hydroelectric plants have been exhausted, it is time to commit to the development of this mature technology on the micro-scale of the infrastructures already created, the novelty is to continue discovering those places where there is untapped energy potential. There is capacity to grow in very small hydroelectric systems with immediate profitability. The researchers in this article describe the first phase of an investigation that has gone hand in hand with its validation and actual exploitation. The aim is for managers not to forget this technology, which has a very wide growth field to satisfy the small demand for distributed energy in water networks of all types. The authors hope that the results of the research carried out will motivate other technicians to apply the energy potential of their water networks for the self-sufficiency of their control, remote control, chemical dosage and water analysis systems. The applications they carry out will be immediately profitable.Publicación Reduction of water and energy consumption in the sanitary ware industry by an absorption machine operated with recovered heat(Elsevier, 2021-01-25) Cuviella-Suárez, Carlos; Colmenar Santos, Antonio; Borge-Diez, David; López-Rey García-Rojas, ÁfricaWater scarcity is a real problem that affects directly over one third of the world population, and greenhouse gases only worsen the situation. Due to this, action must be taken against the over exploitation of resources. Water accounting and saving should be mandatory for a proper sustainable industry. In this regard, the sanitary ware industrial sector, as an intensive consumer of water, should make a social commitment to contribute to stopping water overuse. Sanitary ware manufacturing delivers an amount of water equivalent to the half of the total production weight via evaporation. The aim of this research was to find a green process to reuse the evaporated water and thereby reduce the overall water consumption level as well as promote a cleaner technology with low environmental impact. The key point in supporting sustainability restriction is to match water condensation with heat recovery to avoid any energy surplus. The thermal energy recovered from kiln exhaust gets transferred into a cold flow, which condenses the evaporated water by an absorption cycle. Computational modeling was used to thermodynamically analyze and optimize the performance of this novel technology. The proposed model was applied to the most extended technologies to reduce natural gas usage by 25% and total water usage by 16%. Besides, the surplus of condensed water from combustion and from air moisture has been quantified to be added to savings. The present research provides a practical tool for the sector to use in designing more efficient, green manufacturing plants while supporting a more sustainable business model. It demonstrates and quantifies the potential of water saving in the sanitary ware industry, which had never before been tackled.Publicación Heat recovery in sanitary-ware industry applied to water and energy saving by multi-effect distillation(Elsevier, 2018-12-28) Cuviella-Suárez, Carlos ; Colmenar Santos, Antonio; Borge-Diez, David; López-Rey García-Rojas, ÁfricaSanitary-ware industry, as a sub-sector in the ceramic industry, is a great consumer of energy and water, although there are some opportunities to reduce the global consumption, especially for factories based on resin molds technology. This research aims to show the way to reduce drastically water consumption by recovering waste heat into a multi-effect distillation system to re-use most of the flushing water. This solution improves both, the environmental and economic performance of this industry. The proposed configuration is a multi-effect distillation (MED) adapted to run with recovered heat from the kiln exhausting. The efficiency of the system is improved by recovering the heat of the gas mixture leaving the first effect in the pre-heater of the feeding water. The research lays on the computerized simulation of the coupled systems run under different parameters. Mathematical and thermodynamic models have been developed to simulate the behavior of the system. The obtained results show the optimal configuration depending on the thermal variables which could achieve up to almost 92% of the needed water against conventional technology. The system can be applicable to new or existing factories based on resin molds technology and this research may contribute to reduce consumption of resources and thus, the environmental impact.