Technical and economic performance analysis for a microturbine in combined heat and power generation

Kaikko, Juha; Backman, Jari

doi:10.1016/j.energy.2006.06.013

Cited by 61 publications

(36 citation statements)

References 2 publications

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“…To our knowledge, there are currently no microturbines with TBCs on the metallic components. The turbine inlet temperature (TIT) is hence limited to ~900°C [3], for which the thermal efficiency is relatively low compared to land-based industrial gas turbines. As an alternative way of building up thermally protective coatings on the metallic hot gas components, an in situ deposition method was proposed and examined [4,5] based on the hypothesis that the operation conditions of most gas turbine systems provide a good milieu for combustion chemical vapor deposition (CCVD).…”

Section: Introductionmentioning

confidence: 99%

Ex situ oxidation of IN713 turbine blades in situ deposited with silica layers during operation of a micro-gas turbine

Kim

2011

Met. Mater. Int.

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The long-term stability of silica layers deposited in situ on the IN713 turbine blades was investigated by surveying an ex situ thermally cycled oxidation test in air at 1050°C. Two types of in situ coatings were prepared by burning tetraethylorthosilicate with fuel during a 100-min operation of a 13 kgf-class gas turbine. The degradation of the blades upon the oxidation test was evaluated by monitoring the weight change and by analyzing the microscopic evolution of surface oxides. One coating, characterized by a uniform and relatively thick porous coating on the pressure side, was chipped off in the early stages of the test. The other coating was ~4 µm thick at the region near the root, but was too thin (and transparent) at the other parts of the blade to be rendered as protective one. However, this coating was found to be more stable towards chipping than the other coating during the oxidation test. The stability of the coatings was examined in terms of the interaction between the deposited layer and the underlying thermally grown oxide or substrate during the operation of the gas turbine.

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Section: Introductionmentioning

confidence: 99%

Ex situ oxidation of IN713 turbine blades in situ deposited with silica layers during operation of a micro-gas turbine

Kim

2011

Met. Mater. Int.

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“…The hypothesis was to introduce a 100 kWel microturbine connected in parallel to the grid. Microturbines technology represents, nowadays, a potential alternative to ICE [10], particularly in the context of mini-cogeneration, by comparison with ICE, though they have a lower electrical efficiency and a higher initial cost, they are more compact and lightweight, they require less maintenance and they have a longer working life, thanks to a more straightforward architecture. Results are shown in table 4.…”

Section: Service Sectormentioning

confidence: 99%

Assessment of the impact of local energy policies in reducing greenhouse gas emissions

Arteconi

Bartolini

Brandoni

et al. 2010

WIT Transactions on Ecology and the Environment

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The present work investigates the potential energy savings coming from a careful and detailed local energy policy. The paper analyzes and assesses from technical, economic and environmental viewpoints different initiatives in the energy sector aimed at increasing energy efficiency in end-uses and reducing overall carbon emissions. The results are based on energy planning for five Italian urban areas sized at about fifty thousand inhabitants. The analysis has been developed with the aim of reaching generally applicable criteria suitable for evaluating the local energy policy contribution to the greenhouse gas (GHG) emissions reduction. Several initiatives for the private and public sectors have been considered, such as: (i) the introduction of combined heat and power generation based on useful thermal demand, suitable for the industry and service sectors (swimming pools, large distribution organizations); (ii) generation of electricity from renewables (solar energy, biomass); (iii) thermal insulation of private and public buildings, such as schools; (iv) introduction of micro-combined heat and power generation in the residential sector. For each solution the primary energy reduction and the consequent reduction in GHG emissions have been evaluated and a feasibility analysis has been developed in order to assess the profitability of the investment. Great attention has been paid to the public sector, which has an important role in providing leadership and driving changes in other sectors; furthermore, a rational use of energy combined with the exploitation of country-based incentives is able to reduce the public administrative expenditure. The results show that local energy policy can give an important contribution to gas emission reduction targets, and underline the fundamental role of public sector initiatives.

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“…The hypothesis was to introduce a 100 kWe microturbine connected in parallel to the grid. Microturbines technology represents, nowadays, a potential alternative to ICE [17], particularly in the context of mini-cogeneration, compared with ICE. In fact, though they have a lower electrical effi ciency and a higher initial cost, they are more compact and lightweight, they require less maintenance and they have a longer working life, thanks to a more straightforward architecture.…”

Section: Service Sectormentioning

confidence: 99%

Technical and economic aspects of municipal energy planning

Brandoni¹,

Polonara²

2012

Int. J. SDP

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The present paper analyzes the technical and economic aspects of municipal energy planning, assessing the contribution coming from different energy-saving measures in terms of greenhouse gas (GHG) emission reduction, and estimating the local authorities' investment necessary to foster climate change mitigation. Results are based on three municipal energy plans developed for urban areas located in Marche Region with a number of inhabitants ranging from 5,000 to 100,000. Different aspects of municipal energy management connected to urban size have been investigated. The public administration role has been analyzed in detail in order to identify the determinant factors for municipal energy market involvement.Various opportunities and measures can be undertaken by municipalities to steer the energy system in the right direction, such as building codes, administration simplifi cation, information campaigns and pilot projects aimed at reducing the public administration expenditure and also driving changes in the private sectors. The following barriers to municipal energy market participation have been identifi ed: i) rules of municipal budgeting with debt limit, ii) diffi cult access to non-budgetary sources and iii) lack of human resources dedicated to energy-related issues. Several energy-saving measures have been analyzed for both public and private sectors such as: i) thermal insulation and introduction of photovoltaic (PV) power generation in schools, ii) introduction of micro-combined heat and power (CHP) system as well as geothermal energy in residential sector, iii) CHP systems in the industry sector. Factors suitable for the analysis of urban areas characterized by similar parameters (climate condition, urban density, socio-economic indexes) have been found out. Results reveal that an effi cient local energy planning is able to achieve, at least, a 10% reduction of the energy demand, thus helping the achievement of the ambitious EU's 2020 targets. In particular, the main contribution is expected to come from low-carbon measures in the industry and residential sector. Keywords: energy policy, energy savings, micro-CHP, municipal planning, renewable.1 INTRODUCTION A new energy policy strategy for 2011-2020, containing new legislative initiatives and relative proposals, is still under discussion within the European Union (EU) Commission. In particular, such discussion process started with the publication of the stocktaking document 'Towards a new Energy Strategy for Europe 2011-2020' in March 2010. EU countries are expected to achieve the ambitious EU's 2020 targets and show the world their leadership role in climate change mitigation. Five priority areas have been highlighted for the future energy policy: i) leadership in technological innovation, ii) modern integrated grid, iii) progress toward a low-carbon system, iv) a strong and coordinated external policy to improve relations with producers, consumers and transit countries as Russia, Ukraine, Mediterranean and African countries, v) availability of ...

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Technical and economic performance analysis for a microturbine in combined heat and power generation

Cited by 61 publications

References 2 publications

Ex situ oxidation of IN713 turbine blades in situ deposited with silica layers during operation of a micro-gas turbine

Ex situ oxidation of IN713 turbine blades in situ deposited with silica layers during operation of a micro-gas turbine

Assessment of the impact of local energy policies in reducing greenhouse gas emissions

Technical and economic aspects of municipal energy planning

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