Gas Turbine Cycle with External Combustion Chamber for Prosumer and Distributed Energy Systems

Mikielewicz, Dariusz; Kosowski, Krzysztof; Tucki, Karol; Piwowarski, Marian; Stępień, Robert; Orynycz, Olga; Włodarski, Wojciech

doi:10.3390/en12183501

Cited by 21 publications

(10 citation statements)

References 51 publications

(43 reference statements)

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“…Moreover, external combustion technologies integrate the advantages of gas turbines (low operational costs, high lifetime and reliability, relatively high energy efficiency even at small size) and the capability of using low quality biofuels. 81 Mikielewicz et al 82…”

Section: Cogeneration Technologiesmentioning

confidence: 99%

Potential use of wood pyrolysis coproducts: A review

Pereira

Fauller

Magalhães

et al. 2021

Env Prog and Sustain Energy

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The wood carbonization is made at an enclosed environment with controlled addition of atmospheric air producing, besides charcoal, other coproducts such as condensable and non-condensable gases. These gases, which represent 70% of the dry wood mass, are released into the atmosphere, decreasing air quality and producing environmental and social impacts. In this context, it is necessary to develop technologies capable to convert these gases into usable products or transform them into heat and power. The incineration of gases from charcoal kilns opens new opportunities of business because the energy provided by burners can be utilized for drying the wood to be introduced into the kilns and for generation of electricity. On the other hand, condensable gases can also be used on a route to recover and purify the pyroligneous acid. Pyroligneous acid finds application in diverse areas, as antiseptic, antioxidant, antimicrobial, anti-inflammatory, herbicide, pesticide, plant growth enhancer, antitermitic activities; is a source for valuable chemicals; and provides smoked flavor and aroma for food. The main objective of this review is to explore the potential use of wood pyrolysis coproducts, aiming to subsidize and to encourage the technological development of equipment for use of these coproducts. This paper highlights the potential benefits arising from pyroligneous acid application and discusses the charcoal cogeneration technologies.

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Section: Cogeneration Technologiesmentioning

confidence: 99%

Potential use of wood pyrolysis coproducts: A review

Pereira

Fauller

Magalhães

et al. 2021

Env Prog and Sustain Energy

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“…The assumed values of the efficiences or the losses of particular engine elements are presented in Table 3 [32][33][34]. The chosen numbers can be considered as good average values but not the highest.…”

Section: Modellingmentioning

confidence: 99%

Design Analysis of Micro Gas Turbines in Closed Cycles

Kosowski

Piwowarski

2020

Energies

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The problems faced by designers of micro-turbines are connected with a very small volume flow rate of working media which leads to small blade heights and a high rotor speed. In the case of gas turbines this limitation can be overcome by the application of a closed cycle with very low pressure at the compressor inlet (lower than atmospheric pressure). In this way we may apply a micro gas turbine unit of accepted efficiency to work in a similar range of temperatures and the same pressure ratios, but in the range of smaller pressure values and smaller mass flow rate. Thus, we can obtain a gas turbine of a very small output but of the efficiency typical of gas turbines with a much higher power. In this paper, the results of the thermodynamic calculations of the turbine cycles are discussed and the designed gas turbine flow parts are presented. Suggestions of the design solutions of micro gas turbines for different values of power output are proposed. This new approach to gas turbine arrangement makes it possible to build a gas turbine unit of a very small output and a high efficiency. The calculations of cycle and gas turbine design were performed for different cycle parameters and different working media (air, nitrogen, hydrogen, helium, xenon and carbon dioxide).

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“…Such innovative two-stage ambient air cooling systems consist of chillers that convert the heat of exhaust gas into refrigeration in the form of coolant, feeding turbine intake air coolers, and could find effective application in different types of combustion engines: gas turbines [52,53], gas engines for combustion of biogas [54,55], stationary and marine power plants [56,57].…”

Section: Introductionmentioning

confidence: 99%

Innovative Turbine Intake Air Cooling Systems and Their Rational Designing

et al. 2020

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The efficiency of cooling ambient air at the inlet of gas turbines in temperate climatic conditions was analyzed and reserves for its enhancing through deep cooling were revealed. A method of logical analysis of the actual operation efficiency of turbine intake air cooling systems in real varying environment, supplemented by the simplest numerical simulation was used to synthesize new solutions. As a result, a novel trend in engine intake air cooling to 7 or 10 °C in temperate climatic conditions by two-stage cooling in chillers of combined type, providing an annual fuel saving of practically 50%, surpasses its value gained due to traditional air cooling to about 15 °C in absorption lithium-bromide chiller of a simple cycle, and is proposed. On analyzing the actual efficiency of turbine intake air cooling system, the current changes in thermal loads on the system in response to varying ambient air parameters were taken into account and annual fuel reduction was considered to be a primary criterion, as an example. The improved methodology of the engine intake air cooling system designing based on the annual effect due to cooling was developed. It involves determining the optimal value of cooling capacity, providing the minimum system sizes at maximum rate of annual effect increment, and its rational value, providing a close to maximum annual effect without system oversizing at the second maximum rate of annual effect increment within the range beyond the first maximum rate. The rational value of design cooling capacity provides practically the maximum annual fuel saving but with the sizes of cooling systems reduced by 15 to 20% due to the correspondingly reduced design cooling capacity of the systems as compared with their values defined by traditional designing focused to cover current peaked short-term thermal loads. The optimal value of cooling capacity providing the minimum sizes of cooling system is very reasonable for applying the energy saving technologies, for instance, based on the thermal storage with accumulating excessive (not consumed) cooling capacities at lowered current thermal loads to cover the peak loads. The application of developed methodology enables revealing the thermal potential for enhancing the efficiency of any combustion engine (gas turbines and engines, internal combustion engines, etc.).

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Gas Turbine Cycle with External Combustion Chamber for Prosumer and Distributed Energy Systems

Cited by 21 publications

References 51 publications

Potential use of wood pyrolysis coproducts: A review

Potential use of wood pyrolysis coproducts: A review

Design Analysis of Micro Gas Turbines in Closed Cycles

Innovative Turbine Intake Air Cooling Systems and Their Rational Designing

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