Research Papers

Performance Analysis of the Low Temperature Solar-Boosted Power Generation System—Part II: Thermodynamic Characteristics of the Kalina Solar System

[+] Author and Article Information
Faming Sun

Ritsumeikan Global Innovation
Research Organization,
Ritsumeikan University,
Kyoto 603-8577, Japan;
Institute of Ocean Energy,
Saga University,
1-Honjo machi,
Saga 840-8502, Japan
e-mail: sunfamingjia@gmail.com

Yasuyuki Ikegami

e-mail: ikegami@ioes.saga-u.ac.jp

Hirofumi Arima

e-mail: arima@ioes.saga-u.ac.jp
Institute of Ocean Energy,
Saga University,
1-Honjo machi,
Saga 840-8502, Japan

Weisheng Zhou

College of Policy Science,
Ritsumeikan University,
Kyoto, Japan
e-mail: zhou@sps.ritsumei.ac.jp

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received March 31, 2011; final manuscript received May 2, 2012; published online August 9, 2012. Assoc. Editor: Manuel Romero Alvarez.

J. Sol. Energy Eng 135(1), 011007 (Aug 09, 2012) (8 pages) Paper No: SOL-11-1087; doi: 10.1115/1.4006964 History: Received March 31, 2011; Revised May 02, 2012

In part I of the current work, by quantitative analysis, Kalina solar system using traditional nonconcentrating evacuated tube solar collector (ETSC) with certain solar heat transfer rate is proposed as an optimal choice for its superior thermodynamic performance to generate electricity from low temperature solar energy. To better understand and utilize solar energy in Kalina cycle more efficiently, a thermodynamic qualitative analysis of the solar system is carried on in this part. Many thermodynamical parameters are investigated. Results show that the system pressure difference is one key factor for evaluating the power generation subcycle thermal efficiency, which is an important performance benchmark. Thus, through the instrumentality of simulation results, its corresponding relational expressions are developed by using fitting method. Further, a generalized estimating equation using to estimate generating capacity of the solar system is built. It is shown that when the Kalina solar system is designed and completed, its generating capacity can be estimated by using this equation. And then, a case study of Kalina solar system with 10,000 m2 ETSC is given with the aid of the weather conditions of Kumejima Island in Japan. In this case, its maximum annual power generation is estimated as 931,124 kW h, which is an ideal goal. Herefrom, the corresponding control strategies are proposed for approaching this target. Finally, thermodynamic characteristics of the low temperature Kalina solar system are clarified.

Copyright © 2012 by ASME
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Fig. 1

Temperature with ammonia mass fraction diagram of Kalina solar system

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Fig. 2

Relationship between m·wf and ξ=m·6/m·5 in Kalina solar system

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Fig. 3

Relationship between temperature and enthalpy in Kalina solar system

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Fig. 4

Relationship between m·wf (kg/s) and ηk, pgc (%) and Q·c (kW)

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Fig. 5

Relationship between ΔP=P5-P2 and ηk,pgc with different Q·se

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Fig. 6

Relationship between ΔP=P5-P2 and ηk,pgc at Q·se=150 (kW) with different (UA/Q·)rg

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Fig. 7

Relationship between ΔP=P5-P2 and ηk,pgc in the case of Q·se=150 (kW) and (UA/Q·)rg=0.05 (1/°C) with different y5

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Fig. 8

Relationship between ΔP=P5-P2 and ηk,pgc for Eq. (1) with all data shown in Figs. 5–7

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Fig. 9

Relationship between Pmax and t4 with the initial conditions of Figs. 5–7

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Fig. 10

Relationship between Pmax and t5 with the initial conditions of Figs. 5–7

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Fig. 11

Relationship between λ and ηsc, etsc with the August weather data of Kumejima Island

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Fig. 12

The generated electrical energy of each month in Kumejima Island




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