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Introduction
Ana Picallo took a degree in Mechanical Engineering and her PhD is based on thermoeconomics. It was done under Dr Sala’s supervision at the Department of Thermal Engineering at the University of the Basque Country in Bilbao. Her research areas are related to testing, analysis and optimization of building energy supply systems, thermoeconomics and diagnosis application in buildings.
Publications
Publications (67)
Hybrid energy systems have proven their efficacy in improving energy sustainability. This paper focuses on the
design and evaluation of various hybrid energy systems for hot water production in the experimental plant of the
Laboratory for Quality Control in Buildings. The experimental facility was created to test and control various
systems for ene...
In recent years, the European Union has promoted the concept of collective self-consumption and the so-called energy communities, with the aim of involving citizens in energy management and offering measures to improve energy efficiency. Spain, following the EU directives, promotes a shared use of energy, especially in urban environments. Therefore...
Los sistemas de monitorización de edificios proporcionan grandes volúmenes de información y existen herramientas avanzadas de análisis de datos. Un problema de detección y diagnóstico de fallos (FDD) en los sistemas energéticos de los edificios también puede considerarse un problema de aprendizaje automático puro. El objetivo de este trabajo es pro...
This work, analyzes ventilated façades through the first and second law of thermodynamics. In addition to the energy-balances, it presents the exergy-balances on the interior and exterior surface of a façade, taking into account the different mechanisms of heat exchange. It proposes two new indexes (EQC and ExQC) to characterize the behavior of ven...
Klima-aldaketaren eraginez, tokian-tokiko energia-eskaria aldatzen ari da. Honek, energia-eskaria asetzeko sistemen dimentsionamendu eta operazio moduan eragiten du; batez ere, epe luzerako proiektatzen diren sistemetan. Hala, jatorri berriztagarria duten energia-iturriak ezagutzea, modu jasangarrian ustiatzea eta ustiaketa klima-aldaketaren eskaki...
In this work thermoeconomics is applied to a central thermal system covering three buildings that consists of a cogeneration engine, an aerothermal heat pump and a natural gas condensing boiler. Cogeneration systems integrated with renewable energy technologies are very attractive solutions in the building sector. Nevertheless, the use of cogenerat...
This work defines and analyzes the performance of a polygeneration system in five different locations in Spain to maintain the thermal comfort and air quality of an office building. The facility is based on a chiller and a CHP engine with PV panels that provide almost all the electricity demand of the chiller. According to the energy performance an...
This work describes the project submitted to the University-Society-Business 2021 call for proposals whose aim is to integrate the knowledge and university practices in the field of energy in buildings into secondary school students. The aim is to define the energy strategies to be implemented to strengthen the relationship between secondary educat...
Before applying energy improvement strategies to real energy supply facilities, it is necessary to have an accurate model of their dynamic energy behaviour in order to predict and optimize the results. However, contrary to experimental facilities, in real operating facilities, budget constraints and fast access to recorded data limit the number of...
This work develops a software to control and diagnose building thermal facilities based on thermoeconomics. It is tested with the data obtained from three building blocks in the Basque Country (northern Spain) with the aim of detecting the potential energy saving points and mitigating environmental impacts. Some obstacles, solved, are related to th...
Lan honen helburua da eguzki-kolektoreen egungo egoeraren informazioa ematea, eraikuntza-sektorean. Energia trantsiziorako giltzarri bat da eguzki-energia termikoa eta, horregatik, iturria ustiatzeko teknologiak eta horien funtzionamendu-tarteak ezagutu behar dira, kontuan hartuz, batez ere, Espainiako eguzki-energiaren egungo egoera eta eraikinen...
Thermoeconomics combines the concepts of economics and thermodynamics to assess the cost formation process of thermal systems. It has great applicability in the allocation, optimization and diagnosis of product costs. However, some aspects need to be gathered and solved, to have common criteria for its implementation. That is precisely what happens...
This work tries to present some reflections that help to understand the bases and the interest of the application of the exergetic analysis method and of thermoeconomics in buildings, both in what refers to their envelope and to their facilities. A brief introduction is made to the concept of exergy and the interest in incorporating the exergetic m...
This work analyses deeply and critically the behavior of a heat recovery device of the ventilation system, in a dwelling of the Basque Country, under the energy and the exergy point of view. The aim is to show the different results that come from both perspectives. Heating period was monitored and data of the velocities and temperatures of the extr...
The purpose of this paper is to apply thermoeconomics in a HVAC&R facility in order to implement the dynamic behaviour as well as to solve the direct problem of diagnosis. New methodological aspects of thermoeconomic applications are developed, such as a new method for setting the productive dynamic structure, in particular to define the commonly u...
In order to achieve a sustainable society, the energy consumption in buildings must be reduced. The first step toward achieving this goal is to detect their weak points and analyze the energy-saving potential. to detect the units with higher consumption and cost. Exergy is very useful for analyzing pieces of equipment, systems or entire buildings....
This work applies the Dynamic Advanced Exergy Analysis (DAEA) to a heating and domestic hot water (DHW) facility supplied by a Stirling engine and a condensing boiler. For the first time, an advanced exergy analysis using dynamic conditions is applied to a building energy system. DAEA provides insights on the components’ exergy destruction (ED) by...
Thermoeconomic analysis allows for a deep understanding of the cost formation process within an energy system, providing insights into the possible routes for improvement. Several thermoeconomic approaches are well-established for application in systems with steady operating conditions, such as power plants, while a limited number of applications t...
Microcogeneration systems guarantee the reduction of primary energy consumption and greenhouse gas emissions in residential sector, by reducing fossil fuels demand and grid losses with respect to conventional energy conversion systems. Energy, environmental and economic benefits can be obtained sharing the cogenerated thermal and electric energy am...
Thermoeconomic analysis of building energy supply systems are usually performed following the input-output approach, where the supply chain is divided into several subsystems directly related to each other. However, in this paper Symbolic Thermoeconomics has been applied and a dynamic analysis and comparison has been performed between the old and t...
This paper analyses a microcogeneration system used to satisfy electric, space heating and domestic hot water demands of two separate buildings in a load sharing approach. It consists of natural gas fuelled internal combustion engine with a thermal and electric power of 12.5 kW and 5.5 kW, respectively. A high efficiency auxiliary boiler with a nom...
Se trata de una instalación de calefacción y producción de ACS a partir del aprovechamiento de la energía geotérmica de muy baja temperatura mediante una bomba de calor BC agua-agua de 68 kW, en un edificio de 26 viviendas en el País Vasco. La generación cuenta con un sistema de apoyo mediante caldera de condensación CC a gas natural para las punta...
El 50% de la energía final consumida en Europa es utilizada para calefacción y refrigeración, de la cual el 75% proviene de la quema de combustibles fósiles (derivados de petróleo y gas natural). El 45% de la energía para calefacción y refrigeración es empleada en el sector residencial. En el caso de la Comunidad Autónoma Vasca, el 53% de la energí...
To achieve an efficient use of energy in building energy supply systems not only an adequate design of the equipment is required, but also the detection and immediate determination of the costs of the products through the appropriate sensors. The comparison of these costs with the reference ones will allow us to detect the failures and establish th...
The paper is based on the exergoeconomic study of an installation which covers the heating and DHW demand of a 176 dwellings nZEB in Vitoria-Gasteiz. It is composed by 2 cogeneration engines, 5’5 kWe and 12’5 kWt each and two 5’5 kWt each auxiliary conventional boilers.
The novelty of this paper is that Symbolic Thermoeconomics (ST) is applied in t...
Concerning the building environment HVAC facilities, even if a great effort has been made in developing components and systems with high nominal efficiencies, less attention has been paid to the problem of system maintenance.
The main objective of the thermoeconomic diagnosis is to detect possible anomalies and their location inside a component of...
Application of Thermoeconomics in the diagnosis of building energy supply systems allows the localization and quantification of an abnormal operation, which can cause significant increase in energy consumption to obtain the same product. To do that, a comparison between the real operation of the energy system and the reference operation must be don...
In order to improve energetic efficiency and reduce environmental impact (and therefore, improve the sustainability of buildings), new tools are being developing for the building sector, which are commonly used within the industrial field. Thermoeconomics in one of those new science, which is the one that connects the physics of buildings with econ...
The advantages in applying the exergy concept and exergy efficiencies to evaluate the performance of energy systems in the building environment, contributing to the reduction in the use of high quality energy sources is currently known. Although Thermoeconomics has been widely applied in energy systems at building level Symbolic Thermoeconomics has...
