Gas Turbine Bottoming Cycles: Triple-Pressure Steam Versus Kalina

Marston, C. H.; Hyre, Matthew R.

doi:10.1115/1.2812757

Cited by 33 publications

(9 citation statements)

References 4 publications

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“…The defining feature of the Kalina cycle, the temperature glide during phase change, is primarily beneficial when utilising a sensible heat source such as waste heat [7,18,19] or in this case, molten salt. However, when not utilising a sensible heat source the temperature glide is only beneficial in the condensers.…”

Section: Discussionmentioning

confidence: 99%

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Energy and Exergy Analysis of the Kalina Cycle for Use in Concentrated Solar Power Plants with Direct Steam Generation

et al. 2014

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In concentrated solar power plants using direct steam generation, the usage of a thermal storage unit based only on sensible heat may lead to large exergetic losses during charging and discharging, due to a poor matching of the temperature profiles. By the use of the Kalina cycle, in which evaporation and condensation takes place over a temperature range, the efficiency of the heat exchange processes can be improved, possibly resulting also in improved overall performance of the system. This paper is aimed at evaluating the prospect of using the Kalina cycle for concentrated solar power plants with direct steam generation. The following two scenarios were addressed using energy and exergy analysis: generating power using heat from only the receiver and using only stored heat. For each of these scenarios comparisons were made for mixture concentrations ranging from 0.1 mole fraction of ammonia to 0.9, and compared to the conventional Rankine cycle. This comparison was then also carried out for various turbine inlet pressures (100 bar to critical pressures). The results suggest that there would be no benefit from using a Kalina cycle instead of a Rankine cycle when generating power from heat taken directly from the solar receiver. Compared to a baseline Rankine cycle, the efficiency of the Kalina cycle was about around 5% lower for this scenario. When using heat from the storage unit, however, the Kalina cycle achieved efficiencies up to 20% higher than what was achieved using the Rankine cycle. Overall, when based on an average assumed 18 hours cycle, consisting of 12 hours using heat from the receiver and 6 hours using heat from the storage, the Kalina cycle and Rankine cycle achieved almost equal efficiencies. A Kalina cycle operating with an ammonia mole fraction of about 0.7 returned an averaged efficiency of about 30.7% compared to 30.3% for the Rankine cycle.

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Section: Discussionmentioning

confidence: 99%

“…Additional heat is then recovered from stream (3) to heat stream (14). Stream (4) is then mixed with a lean ammonia solution from the separator (18) to form the basic solution (5). This solution is then condensed (6), pumped to an intermediate pressure (7) and separated into two streams (8) and (14).…”

Section: System Descriptionmentioning

confidence: 99%

Energy and Exergy Analysis of the Kalina Cycle for Use in Concentrated Solar Power Plants with Direct Steam Generation

et al. 2014

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“…Marston et al [9] made a comparison of the performance of both triple-pressure steam cycle and a single-stage Kalina cycle o f his simplified mode [3] and an optimized three-stage Kalina cycle as the bottoming sections of a gas turbine combined cycle power plant. Results showed that both Kalina cycles were mo re efficient than the triple pressure steam cycle.…”

Section: Muruganmentioning

confidence: 99%

A Comparative Study of Integrated Coal Gasification Combined- Cycle Power Plants (ICGCC) with Kalina Cycle

Mahmoud

El-Nahhas

Okeily

et al. 2014

Port-Said Engineering Research Journal

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Low grade waste heat utilizat ion and new combustion technology are challenging tasks for researchers to achieve these objectives. This paper is concerned with the integration of coal gasification system with a comb ined gas turbine, steam turbine power plant cycles and with ammon ia-water cycle, wh ich is known as Kalina cycle. A l-maghara coal in North Sinai is used as the solid fuel in gasification process.Three cycles configurationsare compared as follows: Scheme (A) with dual pressure Heat recovery boiler with the condenser of steam cycle as the evaporator for Kalina cycle,scheme (B) with heat recovery boiler for both of steam and Kalina cycleand scheme (C), similar to scheme (A), but with a superheating in Kalina cycleto identify the most promising one for implementation. Key parameters of Kalina cycle were the main elements of comparison. Results revealed that scheme (A) has the best performance with regard to the output power, thermal efficiency and specific fuel consumption. Substantially, the integration of Kalina cycle with coal gasification comb ined cycle counterbalances the reduction of the overall efficiency due to the gasification thermal efficiency. Therefore, integration of Kalina cycle in the IC GCC is justified.Furthermo re, part load calculations were made fo r scheme (A) and identified that the integration of Kalina cycle to ICGCC imposed restrictions to Kalina cycle constrains, so that it is more economical to keep such configuration of combined plants at nearly full load conditions.

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“…The ORC has been proposed for various applications of WHR including maritime ones for example by MAN Diesel & Turbo [2] as a WHR solution for smaller engines. The Kalina cycle has in the literature [3,4] been claimed to possess potential to achieve higher conversion efficiencies for WHR in general, compared to both ORC and steam Rankine cycles. Controversy exists however, and modelling efforts [5] have showed that the performance of ORC and Kalina may, at best, may be similar for marine application.…”

Section: Introductionmentioning

confidence: 99%

A comparison of advanced heat recovery power cycles in a combined cycle for large ships

Larsen

Sigthorsson

Haglind

2014

Energy

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Gas Turbine Bottoming Cycles: Triple-Pressure Steam Versus Kalina

Cited by 33 publications

References 4 publications

Energy and Exergy Analysis of the Kalina Cycle for Use in Concentrated Solar Power Plants with Direct Steam Generation

Energy and Exergy Analysis of the Kalina Cycle for Use in Concentrated Solar Power Plants with Direct Steam Generation

A Comparative Study of Integrated Coal Gasification Combined- Cycle Power Plants (ICGCC) with Kalina Cycle

A comparison of advanced heat recovery power cycles in a combined cycle for large ships

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