Investigation of an open cycle liquid desiccant system for the air conditioning of an university building

Lazzarin, Renato; D'Ascanio, Andrea

doi:10.1002/er.1253

Cited by 13 publications

(5 citation statements)

References 4 publications

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“…Professor Lazzarin and members of his research team designed, at the end of the 1990s, a liquid desiccant-based air conditioning plant for the annual climatization of one of the renovated buildings of the DTG [35]. Two thermal zones of the building (whole volume 14,500 m 3 ), that is, zone A -refectory -and zone B -main lecture hall -featured high latent load due to the high presence of people, and an important ventilation volume rate for the necessary air changes.…”

Section: Open-cycle Liquid Desiccant System: a Real Case For Air Cond...mentioning

confidence: 99%

“…Each zone was served by an innovative air handling unit (AHU) set https://doi.org/10.1051/e3sconf/202234301002 52 nd Despite some undervalued difficulties that had forced the stop for some months during the ¿rst running period, the plant was carefully monitored during the first years of 2000. Some operational periods allowed to monitor and log many data (temperature, flow rate, state of the equipment) and develop a comprehensive energy analysis of the entire plant [35].…”

Section: Open-cycle Liquid Desiccant System: a Real Case For Air Cond...mentioning

confidence: 99%

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Fifteen years of research in innovative heating, ventilation and air conditioning plants at the Department of Management and Engineering (University of Padova)

Giacomo¹,

Busato

Castellotti

et al. 2022

E3S Web Conf.

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At the Department of Management and Engineering (DTG) of the University of Padova (Italy), the research team led by Prof. Renato Lazzarin, formed by the authors, worked during the first fifteen years of the millennium on different topics focused on innovative heating, ventilation and air conditioning technologies. Both experimental and theoretical/modelling studies were carried out: an air conditioning system with liquid desiccant operating for annual climatization was designed, realized, and tested; a self-regenerating liquid desiccant cooling system based on an electric heat pump was installed and monitored in a new building of the Vicenza Hospital for dehumidification, heating and cooling; a gas engine heat pump plant for the air conditioning of a building of the DTG was designed, realized, and monitored for a long period; a multisource heat pump plant was modelled and dynamically simulated, and then realized and monitored for the climatization of a school building; hybrid water/phase change materials tanks were modelled, designed and tested for thermal energy storage; finally, thermal and electric solar cooling plants were modelled and dynamically simulated for evaluating energy performance. The paper highlights the main theoretical and experimental approaches and the results of the research during the fifteen-year period.

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Section: Open-cycle Liquid Desiccant System: a Real Case For Air Cond...mentioning

confidence: 99%

Section: Open-cycle Liquid Desiccant System: a Real Case For Air Cond...mentioning

confidence: 99%

Fifteen years of research in innovative heating, ventilation and air conditioning plants at the Department of Management and Engineering (University of Padova)

Giacomo¹,

Busato

Castellotti

et al. 2022

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…Micro gas turbines (MGT) and internal combustion engines (ICE) applied to combined heat, cooling and power plants (CHCP) in combination with absorption chillers have been investigated in References 3–8. In other applications, heat produced by solar energy is exploited in combined systems composed of absorption chillers and liquid desiccant systems 9, 10, or natural gas boilers are employed in Li‐Br liquid desiccant systems 11. Some other studies have also been conducted on hybrid desiccant and vapor compression air conditioning systems 12–14, or on plants which foresee the integration of ICE and solid desiccant cooling systems 15.…”

Section: Introductionmentioning

confidence: 99%

Analysis of trigeneration plants: engine with liquid desiccant cooling and micro gas turbine with absorption chiller

Badami

Portoraro

Ruscica

2011

Int. J. Energy Res.

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SUMMARY The performances of two natural gas small‐scale trigeneration plants are dealt with in the paper. The two plants are part of a new cogeneration and trigeneration system laboratory at the Politecnico di Torino (Turin, Italy), which will be set up and exploited for scientific and technical purposes. The first plant has 126/220/210 kW electrical, heating and cooling capacities, respectively, and it is characterized by an innovative internal combustion engine (ICE) that has been coupled to a liquid LiCl–water desiccant cooling system. The other plant has 100/145/98 kW electrical, heating and cooling capacities and is composed of a micro gas turbine, coupled to a LiBr–Water absorption chiller. The aim of the paper was comparing the performances of the two plants from an energetic and economic point of view; the Primary Energy Savings are calculated for both installations through a commonly accepted methodology proposed by the European Union, and through another methodology, reported in literature, which seems more suitable to describe the energetic performances of trigeneration plants. The savings calculated with this second procedure result to be lower than those of the European Union methodology; moreover, the ICE installation always denotes higher performances with respect to the microturbine. From the economic point of view, it is evident that a fuel tax reduction for high‐efficiency cogeneration plants is an essential contribution for the support and development of these systems. Copyright © 2011 John Wiley & Sons, Ltd.

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“…The liquid desiccant-based air conditioning system has been one of the research hot topics. [2][3][4] Previous studies of the liquid desiccant-based air conditioning system focused on independent fresh air handling system working in parallel with sensible cooling terminal equipment, such as dry coils and chilled ceiling. [5][6][7] Liquid desiccant in the fresh air handling system is responsible for latent load removal and indoor humidity control, and sensible terminal equipment is responsible for sensible load removal and indoor temperature control.…”

Section: Introductionmentioning

confidence: 99%

Comparison study of air mixing modes in liquid desiccant based all-air air conditioning systems

Xiao

Niu

2011

Building Services Engineering Research and Technology

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Liquid desiccant is an energy-saving, environmentally friendly and healthy means of air dehumidification. A liquid desiccant-based all-air air conditioning system is studied by simulation. Two different modes of air mixing between the return air and the fresh air are compared, that is mixing before and mixing after the liquid desiccant dehumidifier, respectively. System performance and total energy consumption of the two modes under different operation conditions are obtained. The results show that mixing air after dehumidification consumes less energy than mixing air before dehumidification. Coefficient of performance (COP) of the all-air system with air mixing after dehumidification is higher. The differences of COP and energy consumption between the two air mixing modes increase when the outdoor air temperature and relative humidity increase. Practical application: Liquid desiccant based all-air system is quite suitable for museums, libraries and computer centres where water is not allowed to enter the space for property safety and strict thermal-hygrometric control is necessary. The results of this paper provide guidelines on the selection of air mixing modes in liquid desiccant-based all-air systems, considering energy consumption and system COP.

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Investigation of an open cycle liquid desiccant system for the air conditioning of an university building

Cited by 13 publications

References 4 publications

Fifteen years of research in innovative heating, ventilation and air conditioning plants at the Department of Management and Engineering (University of Padova)

Fifteen years of research in innovative heating, ventilation and air conditioning plants at the Department of Management and Engineering (University of Padova)

Analysis of trigeneration plants: engine with liquid desiccant cooling and micro gas turbine with absorption chiller

Comparison study of air mixing modes in liquid desiccant based all-air air conditioning systems

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