Numerical Simulation of Energy Systems to Control Environment Microclimate

Genco, Angela; Viggiano, Annarita; Viscido, Lucio; Sellitto, Giuseppe; Magi, Vinicio

doi:10.18280/ijht.34s249

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…This was also highlighted in other publications [52]. However, the ratio of the heating demand and the cooling demand is strictly related to the climatic conditions [53]. In the museum building under consideration, the cooling demand was only 0.6-3.7% of the total demand.…”

Section: Resultsmentioning

confidence: 53%

Proposed Strategies for Improving Poor Hygrothermal Conditions in Museum Exhibition Rooms and Their Impact on Energy Demand

Ferdyn-Grygierek

Grygierek

2019

Energies

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In museums, poor microclimate conditions, especially large changes in relative humidity and temperature, can lead to serious deterioration of the exhibits. Properly designed heating, ventilation, and air conditioning (HVAC) systems for precise control of the air parameters are required. However, due to the financial restrictions of museums, complex air-conditioning systems are often not feasible. In this study, we tested and propose novel methods to reduce the short- and long-term fluctuations in the relative humidity in exhibition rooms of a Polish museum. The methods only include indoor temperature and ventilation airflow control strategies, without the use of (de)humidification equipment. The analysis is based on simulations using EnergyPlus software. A multi-zone thermal model of the museum building was validated and calibrated with measured data. A full calendar year was simulated for five control cases (including the current method used) and two internal heat gain schedules. The energy demand for heating and cooling for each case was calculated. The combination of temperature control and adequate ventilation using ambient airflow allows for dramatic improvement in the microclimate conditions. The proportion of the year when the instantaneous indoor relative humidity is ±5% from set point decreased from 85% to 20%. A significant effect was obtained over the summer months.

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Section: Resultsmentioning

confidence: 53%

Proposed Strategies for Improving Poor Hygrothermal Conditions in Museum Exhibition Rooms and Their Impact on Energy Demand

Ferdyn-Grygierek

Grygierek

2019

Energies

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“…This results in a very small amount of neighbor vertexes per node. Through plenty of empirical studies at home and abroad [20][21][22][23][24][25][26][27][28][29][30], we can confirm that there is a scale-free structure in WSNs. However, there are a lot of highdegree vertexes in scale-free networks; these sensor nodes need to connect to a large number of nodes, so they will exhaust energy fast.…”

Section: Evolution Model Of Wireless Sensor Network For Communicatiomentioning

confidence: 85%

A Novel Wireless Sensor Network Evolution Model Based on Energy-Efficiency

Gao¹,

Yang²

2017

Int. J. Onl. Eng.

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Abstract-The Barabási-Albert (BA) model is a famous complex network model that generates scale-free networks. Wireless sensor networks (WSNs) had been thought to be approximately scale-free through lots of empirical research. Based on the BA model, we propose an evolution model for WSNs. According to actual influence factors such as the remainder energy of each sensor and physical link capability of each sensor, our evolution model constructs WSNs by using a preferential attachment mechanism. Through simulation and analysis, we can prove that our evolution model would make the total energy consumption of the WSNs more efficient and have a superior random node error tolerance.

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“…where SEC = ratio between energy consumption and produced water [kWh/dm 3 ] Q c = latent heat of condensation per unit mass [kJ/kg] ρ = water density in liquid phase, assumed 1 kg/dm 3 Latent heat of condensation, Q c , depends on temperature, t ( • C); in a range of temperatures compatible with AWG technology, it can be calculated as follows [38]:…”

Section: Wet Indicatormentioning

confidence: 99%

Air to Water Generator Integrated Systems: The Proposal of a Global Evaluation Index—GEI Formulation and Application Examples

Cattani¹,

Cattani

Magrini

2021

Energies

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Due to water scarcity, in the last few decades, air-to-water generator (AWG) technology, whose useful effect is the extraction of water from air, has been improved. In particular, in the last few years, advanced AWG integrated systems have been developed. Such systems permit, not only to condense water from air, but also the smart use of the by-side effects of the process in order to partially or totally cover the heating ventilation air conditioning (HVAC) needs of a building. Presently, there are no evaluation tools that permit a complete comparison among AWG machines, taking into account all the useful effects that can be obtained at the same time and with the same energy input. The current work, starting from the need for such a tool, proposes a global index whose formulation considers all useful effects of an integrated system, the energy required to obtain them, and the integration degree of the machine. The index translates into a single number the system global efficiency, by means of a particular combination of existing efficiency indicators. In its extended formulation, it can be applied, not only to AWGs, but also to other HVAC integrated systems, as well as to combinations of non-integrated and integrated solutions. In addition to equations, the paper provides calculation examples and a case study in order to show the practical application and advantages of GEI.

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Numerical Simulation of Energy Systems to Control Environment Microclimate

Cited by 6 publications

References 13 publications

Proposed Strategies for Improving Poor Hygrothermal Conditions in Museum Exhibition Rooms and Their Impact on Energy Demand

Proposed Strategies for Improving Poor Hygrothermal Conditions in Museum Exhibition Rooms and Their Impact on Energy Demand

A Novel Wireless Sensor Network Evolution Model Based on Energy-Efficiency

Air to Water Generator Integrated Systems: The Proposal of a Global Evaluation Index—GEI Formulation and Application Examples

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