Integrative modelling and optimisation of a desiccant cooling system coupled with a photovoltaic thermal-solar air heater

Fan, Wenke; Kokogiannakis, Georgios; Ma, Zhenjun

doi:10.1016/j.solener.2019.10.030

Cited by 35 publications

(9 citation statements)

References 26 publications

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“…It is noticeable that pattern 5 covered the longest distance underneath the panel, which conceivably created the largest cooling area and therefore the largest amount of heat. Changing the length and depth of a cooling path can affect the behavior of the PV [43][44][45][46]. On the other hand, cooling pattern 1 produced the lowest efficiencies and the highest surface temperatures.…”

Section: Resultsmentioning

confidence: 99%

Investigation of a Real-Time Dynamic Model for a PV Cooling System

et al. 2022

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The cooling of PV models is an important process that enhances the generated electricity from these models, especially in hot areas. In this work, a new, active cooling algorithm is proposed based on active fan cooling and an artificial neural network, which is named the artificial dynamic neural network Fan cooling algorithm (DNNFC). The proposed system attaches five fans to the back of a PV model. Subsequently, only two fans work at any given time to circulate the air under the PV model in order to cool it down. Five different patterns of working fans have been experimented with in this work. To select the optimal pattern for any given time, a back propagation neural network model was trained. The algorithm is a dynamic algorithm since it re-trains the model with new recorded surface temperatures over time. In this way, the model automatically adapts to any weather and environmental conditions. The model was trained with an indoor dataset and tested with an outdoor dataset. An accuracy of more than 97% has been recorded, with a mean square error of approximately 0.02.

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Section: Resultsmentioning

confidence: 99%

Investigation of a Real-Time Dynamic Model for a PV Cooling System

et al. 2022

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“…Figure 6 shows the 𝐶𝑂𝑃 𝑇𝐻 for different three cities. A hybrid photovoltaic-thermal collector-solar air heater (PVT-SAH) was developed and coupled with a building model to evaluate the performance optimisation of the system [39]. The energy efficiency of the desiccant cooling system was evaluated and optimised using the models developed.…”

Section: Application Of Desiccant In Air-conditioning Systemmentioning

confidence: 99%

Review of Desiccant in the Drying and Air-Conditioning Application

Ramli¹,

Misha²,

Haminudin³

et al. 2021

IJHT

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Desiccant is a hygroscopic substance generally used in the dryer and air-conditioning system as a drying agent. The function of desiccant is to remove moisture from the air to reduce the humidity of the surrounding air been conditioned. This paper presents several works on the performance of desiccant material in the drying and air-conditioning application. It puts focus on the various advantages and disadvantages of the use of desiccant as a drying agent. There are some advantages of using desiccant include consistent drying and low energy usage. However, there are several disadvantages of using desiccants which are low capacity for moisture absorption and pressure drop in solid desiccant. Solar drying applications have some advantages such as being comparatively cheaper than other methods and less risk of spoiling the product. On the contrary, drying applications have disadvantages include being lower in comparison to the original foodstuff and drying foods eventually leads to shrinkage. The advantages of using desiccant in air-conditioning applications offer dehumidified fresh air to keep the building's temperature in a comfortable range and enhances water recovery efficiency. There are disadvantages such as desiccant will substantially impact the system's performance and desiccant should be cooled after completely dried.

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“…The plant hybridization generally requires more available surface. As a consequence, several research projects dealt with the potential application in desiccant cooling system of both water-cooled and air-cooled PV/T technologies [ [44] , [45] , [46] ]. Unfortunately, those devices are still expensive, and they are not yet beneficiary of incentive schemes, so that their adoption can be not cost-effective.…”

Section: Introductionmentioning

confidence: 99%

The potential role of trans-critical CO2 heat pumps within a solar cooling system for building services: The hybridised system energy analysis by a dynamic simulation model

et al. 2021

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The rotary desiccant wheels application in the air conditioning systems are used for the air dehumidification by means of hygroscopic layers for water vapor adsorption. Nevertheless, external heat sources are required for water desorption to close the air treatment cycle. This paper investigates on the possibility to integrate in that cycle a new component, such as the trans -critical CO 2 heat pump, to reduce the contribution of external thermal sources. In so doing, the high temperature waste heat discharged by the heat pump hot sink can be fruitfully exploited. Additionally, a PV array has been added to the typical layout based on the solar collectors, in order to assure the heat pump electrical driving. The energy analysis is carried out by calculating the energy performance indicators of the whole cooling system, simulating it by a dynamic model built in the MATLAB SIMULINK environment. Specifically, an air handling unit has been properly sized to supply cooling load to a reference conference hall of 1200 m 3 , with changes in boundary conditions (i.e. solar radiation, daily temperature and relative humidity variations). Indeed, three different cities representing the most typical Italian climatic zones, have been considered for assessing the proposed technical option suitability.

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Integrative modelling and optimisation of a desiccant cooling system coupled with a photovoltaic thermal-solar air heater

Cited by 35 publications

References 26 publications

Investigation of a Real-Time Dynamic Model for a PV Cooling System

Investigation of a Real-Time Dynamic Model for a PV Cooling System

Review of Desiccant in the Drying and Air-Conditioning Application

The potential role of trans-critical CO2 heat pumps within a solar cooling system for building services: The hybridised system energy analysis by a dynamic simulation model

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