Optimum design on the performance parameters of a two-stage combined semiconductor thermoelectric heat pump

Lai, Hongkai; Pan, Yuzhuo; Chen, Jincan

doi:10.1088/0268-1242/19/1/003

Cited by 32 publications

(26 citation statements)

References 12 publications

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“…The THP does not have moving parts, such as the refrigerant and compressor used in the conventional heat pump. Some studies have been conducted to adapt the THP to a building air conditioning system [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Energy Saving Potential of a Thermoelectric Heat Pump-Assisted Liquid Desiccant System in a Dedicated Outdoor Air System

2017

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Abstract:The main objective of this study was to develop a thermoelectric heat pump and liquid desiccant system based on a dedicated outdoor air system (THPLD-DOAS). An internally-cooled and -heated liquid desiccant system was used and a thermoelectric heat pump (THP) served as the desiccant cooling and heating energy source for dehumidification and regeneration of the desiccant solution, respectively. In order to investigate the energy-saving potential of the proposed system, its thermal performance and operating energy consumption during the cooling season were compared to those of a conventional dedicated outdoor air system with a ceiling radiant cooling panel system (DOAS-CRCP). Detailed simulations for each system were conducted under hot and humid climatic conditions. Their thermal performance under various room sensible heat factor (RSHF) conditions was evaluated to observe the energy performance, depending on the dehumidification performance, of the liquid desiccant system integrated with the THP. The results showed that the coefficient of performance (COP) of the THP ranged from 0.8 to 1.2 to maintain a sufficient dehumidification rate. The operating energy of the THPLD of the proposed system was 6.6% to 16.0% less than that of the chiller operating energy of a conventional DOAS. Consequently, the proposed system consumed 0.6-23.5% less operating energy compared to the conventional DOAS.

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Section: Introductionmentioning

confidence: 99%

“…Lai et al [22] established a new cycle model of a two-stage combined THP system. They suggested that two-stage THP systems have to be used over a large temperature range of the heated space and heat sink.…”

Section: Introductionmentioning

confidence: 99%

Energy Saving Potential of a Thermoelectric Heat Pump-Assisted Liquid Desiccant System in a Dedicated Outdoor Air System

2017

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“…In those configurations, heat is removed from the cold side of the colder stage, and this heat is continuously transferred to the hot side of the hotter stages. Two param-eters, the maximum cooling capacity and the maximum coefficient of performance (COP), are of particular interest in characterizing TECs (3) . Xuan et al (2) - (5) and Chen et al (3), (6) investigated the maximum temperature difference, the maximum cooling capacity and the maximum COP of two-stage TECs.…”

Section: Introductionmentioning

confidence: 99%

“…Two param-eters, the maximum cooling capacity and the maximum coefficient of performance (COP), are of particular interest in characterizing TECs (3) . Xuan et al (2) - (5) and Chen et al (3), (6) investigated the maximum temperature difference, the maximum cooling capacity and the maximum COP of two-stage TECs. Based on the configurations of two-stage TECs, these works employed derivative methods that involved complicated procedures for optimizing the parameters of interest.…”

Section: Introductionmentioning

confidence: 99%

“…The parameters, the internal structures and the supplied electrical currents, were optimized. The theoretical formulae derived in earlier works (3), (4) for twostage TECs have been written in dimensional forms, such that each term in the formulae has a physical meaning. The optimal parameters obtained from GA were also compared with the available results presented in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Optimizing the Arrangement of Two-Stage Thermoelectric Coolers through a Genetic Algorithm

Cheng

Shih

2006

JSME Int. J., Ser. B

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This study presents a new approach that uses a genetic algorithm (GA) to optimize the arrangement of two-stage thermoelectric coolers (TECs). Three practical configurations of two-stage TECs, 1) with two stages electrically connected in series, 2) with two stages electrically separated from each other and 3) with two stages electrically connected in parallel, were studied. Parameters, the applied electrical current and the number of thermocouples in each stage, were optimized to maximize the cooling capacity and the coefficient of performance (COP). The optimal parameters of each two-stage TECs were determined for each target cold-side temperature, and the maximum cooling capacity and the maximum COP were thus reached. The results of the optimization show that the electrically separated two-stage TECs yield the maximum cooling capacity, whereas the two-stage TECs that are electrically connected in series and electrically separated both produce the maximum COP. The optimal design of two-stage TECs can be realized using GA, and this method has considerable potential in designing a complex TEC system.

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Geometric optimization of trapezoidal thermoelectric heat pump considering contact resistances through genetic algorithm

2017

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Summary An alternate option for improving the performance of the thermoelectric heat pump (TEHP) is the variation in thermoelectric leg configuration. In this paper, the thermodynamic model based on first and second law of thermodynamics for an exoreversible TEHP including influence of Thomson effect as well as leg geometry on the coefficient of performance and heating load of the device has been developed and optimized. Modified expressions have been derived analytically for dimensionless heating load, irreversibilities, figure of merit, energy, and exergy efficiency. The effects of operating and geometry parameters such as shape parameter (Ac/Ah), temperature ratio (Tc/Th), Thomson effect, thermal and electrical contact resistances on the coefficient of performance, and heating load of the TEHP have been analysed. The results indicate that the Thomson effect has adverse effect on heating load of the system. The optimal parameters obtained through GA optimization process have been compared with the optimal parameters obtained through analytical method which proved the validity of GA optimization method for optimization of TEHP. After the testing, the GA optimization has been performed to determine the optimum parameters corresponding to maximum energy efficiency and maximum heating load. It was found that the GA population converges quickly after 20 runs only which proved the GA as time and cost‐effective optimization tool. This study will be useful for designing of practical TEHP systems of different leg geometries.

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Optimum design on the performance parameters of a two-stage combined semiconductor thermoelectric heat pump

Cited by 32 publications

References 12 publications

Energy Saving Potential of a Thermoelectric Heat Pump-Assisted Liquid Desiccant System in a Dedicated Outdoor Air System

Energy Saving Potential of a Thermoelectric Heat Pump-Assisted Liquid Desiccant System in a Dedicated Outdoor Air System

Optimizing the Arrangement of Two-Stage Thermoelectric Coolers through a Genetic Algorithm

Geometric optimization of trapezoidal thermoelectric heat pump considering contact resistances through genetic algorithm

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