Modelling and control optimization of a solar desiccant and evaporative cooling system using an electrical heat pump

Aprile, Marcello; Scoccia, Rossano; Motta, Mario

doi:10.1016/j.egypro.2012.11.057

Cited by 11 publications

(12 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The system description and the theoretical energy savings of this system have been assessed in [3]. The plant is intended to supply primary air to a dormitory in Milan (Italy).…”

Section: Plant Description and Control Strategymentioning

confidence: 99%

“…3). The state machine controller, developed through extensive simulations in [3], has been completed with safety controls and implemented into the real plant. a b…”

Section: Plant Description and Control Strategymentioning

confidence: 99%

“…The heat pump is water cooled, reversible, and can modulate on two capacity steps. The mathematical model consists in a couple of algebraic equations, one for cooling power and the other for electricity consumption, identified in a previous work [3]. It is a grey box model that uses the nominal behavior of the two parallel compressors according to the feed water temperatures at evaporator and condenser combined with the energy balances on the evaporator and condenser loops.…”

Section: Solar Sub-systemmentioning

confidence: 99%

“…Among them, an hybrid solar DEC system has been designed and installed in 2013 [3]. In this novel concepts, the theoretical energy performances is often hardly achieved without the continuous monitoring and analysis of the correct system's components operation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Continuous Commissioning Analysis and its Application to a New Installed Solar Driven DEC System Coupled with Heat Pump

et al. 2015

Self Cite

View full text Add to dashboard Cite

The aim of this paper is to define and implement a continuous commissioning methodology that can be effectively applied to a solar driven desiccant and evaporative cooling (DEC) system. The objective is to assess the energy performance of the system's components and identify possible operation faults. The methodology consists in the breakdown and analysis of the DEC into subsystems; for each of them a simplified dynamic mathematical model based on experimental data has been developed. A possible fault is detected when the difference between the theoretical and measured performances is higher than the accuracy of the methodology. The proposed methodology has been successfully implemented for a hybrid solar DEC system comprising a nonconventional DEC air-handling unit, a solar thermal system and an electrical heat pump. The results of the methodology's application to the first experimental data of summer 2014 lead to the following conclusions: the solar sub-system operated as expected whereas the heat pump and the desiccant rotor did not. In particular, the electrical heat pump has a higher cooling capacity than the one predicted at partial load but with a similar COP value, this deviation is mainly due to the assumed partial load performance coefficient. The desiccant rotor presents a much lower performance than the one expected. However, the rotor inefficiency is difficult to highlight due to the high measurement uncertainties on the air side.

show abstract

“…The system description and the theoretical energy savings of this system have been assessed in [3]. The plant is intended to supply primary air to a dormitory in Milan (Italy).…”

Section: Plant Description and Control Strategymentioning

confidence: 99%

“…3). The state machine controller, developed through extensive simulations in [3], has been completed with safety controls and implemented into the real plant. a b…”

Section: Plant Description and Control Strategymentioning

confidence: 99%

Section: Solar Sub-systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Continuous Commissioning Analysis and its Application to a New Installed Solar Driven DEC System Coupled with Heat Pump

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…The system is composed of an air handling unit coupled with a radiant ceiling that provides most of the energy required to remove the sensible cooling/heating load. Aprile et al [2] investigated the control optimization of a solar assisted airconditioning concept combining a desiccant and evaporative cooling system with an electrical reversible water/water heat pump. In summer, the heat pump cools the supply air stream and pre-heats the regeneration air when dehumidification is needed; in winter, the heat pump provides auxiliary heat if a minimum temperature is available in the heat storage, otherwise a backup boiler is used.…”

Section: Introductionmentioning

confidence: 99%

The effectiveness method to predict the behaviour of a desiccant wheel: An attempt of experimental validation

Ruivo

Angrisani

2014

Applied Thermal Engineering

View full text Add to dashboard Cite

The desiccant wheel is a key component in solid-desiccant systems. At present, the analysis of the behaviour of air handling units based on desiccant wheels is a complex task. It is difficult to access a simple model that can represent the behaviour of commercialized desiccant wheels with sufficient accuracy.Experimental data measured in an air handling unit equipped with a desiccant wheel are considered in the present work. The air handling unit belongs to a test facility with a microcogeneration system located at Università degli Studi del Sannio (in Benevento, Southern Italy). Thermal energy from the microcogenerator is used to heat up the regeneration airflow. An attempt of investigating the validity of the simplified effectiveness method in predicting the global behaviour of a desiccant wheel is performed. Two approaches are used with different pair of effectiveness parameters.Only one sensor of temperature and one sensor of relative humidity were used in each measuring section of the air handling unit. This constraint is most crucial at both outlet * Corresponding author. Tel.: +351 289 800100; fax: +351 289 888405; e-mail: cruivo@ualg.pt M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT2 sections of the desiccant wheel due to the strong dependence of the air state on the angular position.An empirical correction of the measured state of the process air at the outlet of the desiccant wheel is used. The corrected data are used in the investigation of the validity of the effectiveness method by using constant values in a large set of cases where the rotation speed of the desiccant wheels and the fans are kept constant. Important deviations between the predicted and the experimental results were found in a significant number of cases, therefore there is the need of improving the method by taking into account the effect on the effectiveness parameters of varying the inlet states of both airflows.

show abstract

Field testing of a novel hybrid solar assisted desiccant evaporative cooling system coupled with a vapour compression heat pump

Frein

Muscherà

Scoccia

et al. 2018

Applied Thermal Engineering

View full text Add to dashboard Cite

Modelling and control optimization of a solar desiccant and evaporative cooling system using an electrical heat pump

Cited by 11 publications

References 6 publications

A Continuous Commissioning Analysis and its Application to a New Installed Solar Driven DEC System Coupled with Heat Pump

A Continuous Commissioning Analysis and its Application to a New Installed Solar Driven DEC System Coupled with Heat Pump

The effectiveness method to predict the behaviour of a desiccant wheel: An attempt of experimental validation

Field testing of a novel hybrid solar assisted desiccant evaporative cooling system coupled with a vapour compression heat pump

Contact Info

Product

Resources

About