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author:

Lin, Li (Lin, Li.) [1] (Scholars:林立) | Tian, Yao (Tian, Yao.) [2] | Luo, Yu (Luo, Yu.) [3] | Chen, Chongqi (Chen, Chongqi.) [4] (Scholars:陈崇启) | Jiang, Lilong (Jiang, Lilong.) [5] (Scholars:江莉龙)

Indexed by:

EI Scopus SCIE

Abstract:

Traditional single effect and double effect absorption chillers have relatively narrow working temperature ranges, which limits their application of solar systems. This study proposes a novel solar system integrating concentrating photovoltaic and thermal collectors, and a variable effect absorption chiller, for more flexible and efficient co-generation of electricity and cooling. In this study, variable effect chiller was optimized, showing that three working modes, combined with optimized control, make variable effect chillers a superior choice to the single effect and double effect types. Then, dynamic simulations of the solar co-generation system were performed, in order to study the effects of temperature control on system performance. The results showed that, a high turn-off temperature for the chiller generally results in higher cooling power, shorter working hours for the chiller, and in some cases, a frequent onoff cycling of chiller. With the increase in working temperature level, the cooling exergy efficiency increases, but total exergy efficiency decreases due to the photovoltaic cell's degraded performance. The total exergy efficiency is approximately 32%-33%. A larger difference between turn-on and turn-off temperatures delays the start time of the chiller while ensuring the full use of solar energy. By adjusting the temperature control strategy, the novel solar co-generation system can offer a cooling-electricity ratio from 1.4 to 2.0, which is capable of meeting the demands in many cases. The proposed system offers flexible co-generation of cooling and electricity.

Keyword:

Concentrating photovoltaic and thermal (CPV/T) collector Dynamic simulation Exergy efficiency Solar cooling Variable effect absorption refrigeration cycle

Community:

  • [ 1 ] [Lin, Li]Fuzhou Univ, Sch Chem Engn, NERC CFC, Fujian 350002, Peoples R China
  • [ 2 ] [Tian, Yao]Fuzhou Univ, Sch Chem Engn, NERC CFC, Fujian 350002, Peoples R China
  • [ 3 ] [Luo, Yu]Fuzhou Univ, Sch Chem Engn, NERC CFC, Fujian 350002, Peoples R China
  • [ 4 ] [Chen, Chongqi]Fuzhou Univ, Sch Chem Engn, NERC CFC, Fujian 350002, Peoples R China
  • [ 5 ] [Jiang, Lilong]Fuzhou Univ, Sch Chem Engn, NERC CFC, Fujian 350002, Peoples R China

Reprint 's Address:

  • 罗宇 江莉龙

    [Luo, Yu]Fuzhou Univ, Sch Chem Engn, NERC CFC, Fujian 350002, Peoples R China;;[Jiang, Lilong]Fuzhou Univ, Sch Chem Engn, NERC CFC, Fujian 350002, Peoples R China

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Source :

ENERGY CONVERSION AND MANAGEMENT

ISSN: 0196-8904

Year: 2020

Volume: 206

9 . 7 0 9

JCR@2020

9 . 9 0 0

JCR@2023

ESI Discipline: ENGINEERING;

ESI HC Threshold:132

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 22

SCOPUS Cited Count: 25

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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