Academic literature on the topic 'Non-residential unit'
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Journal articles on the topic "Non-residential unit"
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Foryś, Iwona, Ewa Putek-Szeląg, and Beata Ziembicka. "An Attempt to Determine the Impact of Energy Intensity on the Market Value of Residential Units on the Example of Selected Buildings in Szczecin." Real Estate Management and Valuation 28, no. 1 (March 1, 2020): 64–79. http://dx.doi.org/10.2478/remav-2020-0006.
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AbstractEnvironmental requirements, constantly increasing energy prices as well as energy consumption by residential units and buildings have become an important factor in the decision-making processes in the real estate market. The preferences of residential unit buyers who recognize the problem of energy intensity and translate it into the transaction price have also been changing. However, amendments to the Act on real estate management and new European standards have imposed an obligation to include the certificates of energy performance of buildings and premises on real estate valuers in the valuation process. In this paper, energy intensity understood as the heating requirements of multi-family residential buildings is the basis for assessing the impact of the proposed variants on the market value of residential units. The paper analyzes the energy intensity of various types of buildings (e.g. in low and high buildings) and its impact on the market value of residential units in a selected housing estate in Szczecin, when the property valuer has access to energy performance certificates of neither the unit under valuation nor the units selected for comparison. The purpose of this study is to identify the relationship between the energy intensity and the market value of residential units. The proposed three models of real estate market value: non-classical, multiple regression and average price adjustment taking into account energy intensity, obtain results consistent with the actual transaction price at a satisfactory level. The assessment was made using standard deviation, a coefficient of variation and the average error of forecasts.
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Pala, Paweł. "Effect on surface deformation resulting from mining activity on value of property valuation. A case study from Jastrzębie- Zdrój region." Contemporary Trends in Geoscience 7, no. 1 (June 1, 2018): 127–32. http://dx.doi.org/10.2478/ctg-2018-0008.
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Abstract The subject of the research presented in this article is the effect of subsidence resulting from underground mining exploitation on the value of non-developed real estate intended for residential construction (excluding multifamily) in Jastrzębie-Zdrój region. The article describes methodology, which helped in creating a map of average unit prices of non-developed residential properties and a map of subsidence in years 2008-2017, as well as a chart comparing these two issues. The results of the research show a relation between subsidence and nondeveloped residential properties value.
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Lim, Hyojin, Sungho Tae, and Seungjun Roh. "Analysis of the Primary Building Materials in Support of G-SEED Life Cycle Assessment in South Korea." Sustainability 10, no. 8 (August 9, 2018): 2820. http://dx.doi.org/10.3390/su10082820.
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In recent years, much research has been conducted internationally to quantitatively evaluate the environmental impact of buildings in order to reduce greenhouse gas emissions and address associated environmental problems. With this in mind, the Green Standard for Energy and Environmental Design (G-SEED) in South Korea was revised in 2016. However, the various possible evaluation methods make it difficult to conduct building life cycle assessment. Moreover, compared to research on residential buildings, life cycle assessment research on non-residential buildings is scarce. Therefore, this study analyzes primary building materials for life cycle assessment of current non-residential buildings to support Korean G-SEED requirements. Design documents for various non-residential buildings are obtained, and the types and numbers of materials used in production are determined. Next, the primary building materials contributing high cumulative weight based on the ISO14040 series of standards are analyzed. We then review the most commonly-used building materials while considering non-residential building types and structures. In addition, construction material reliability is evaluated using the environmental impact unit value. With our results, by suggesting the primary building materials in non-residential buildings, efficient life cycle assessment of non-residential buildings is possible in terms of time and cost.
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McMahon, Catherine, Bryanne Barnett, Nicholas Kowalenko, Christopher Tennant, and Neville Don. "Postnatal Depression, Anxiety and Unsettled Infant Behaviour." Australian & New Zealand Journal of Psychiatry 35, no. 5 (October 2001): 581–88. http://dx.doi.org/10.1080/0004867010060505.
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Objective: This study compares maternal mood, marital satisfaction and infant temperament in 128 mothers admitted to the residential care unit of a parentcraft hospitaland 58 mothers in a demographically matched group. Method: Mothers were recruited from the residential care unit of a parentcraft hospital (Tresillian Family Care Centres) and a comparison group from a private obstetric practice in the same demographic area. Both groups completed self-report questionnaires on depression, anxiety and marital adjustment, while mothers in the residential care group also received a structured diagnostic interview for depression (CIDI). Results: Sixty-two per cent of mothers in the residential care group met diagnostic criteria for a major depressive episode occurring since childbirth and a further 13% met DSM-IV research criteria for minor depression. The residential care group also scored significantly higher on both state and trait anxiety and rated their infants as significantly more temperamentally difficult than did the comparison group. Conclusions: This study replicates a previous Australian finding of a high incidence of maternal mood disorders in mothers admitted to parentcraft hospitals. Acknowledgement of the close association between maternal mood state and unsettled infant behaviour facilitates an integrated multidisciplinary approach offering appropriate management for both mothers and infants. Residential care units may be ideally suited to provide such early intervention strategies in a non-stigmatizing environment, but provision of adequate staff support, mental health consultation, education and skills in managing mental health problems in these settings is important.
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Băbălau, Anişoara, and Adriana Ionescu. "Rules of Taxing Property Buildings." Applied Mechanics and Materials 880 (March 2018): 377–82. http://dx.doi.org/10.4028/www.scientific.net/amm.880.377.
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An Integral Part of the Economic and Financial Mechanism, Taxation Means, on the One Hand, the Collection of Resources to the State Budget, but Also a Legal Relationship between a Debtor and a Creditor, Including their Correlation Rights and Obligations. the Determinants of Budgetary Revenues Refer to the Subjects of Taxation, the Object of Taxation, the Unit of Taxation, the Tax Rate, the Rights and Obligations of the Debtors, their Liability, as well as the Payment Terms. Building Tax is an Annual Tax due to the Local Budget of the Administrative-Territorial Units in which the Building is Located by its Owners. Therefore, Subjects of Taxation are those who Own a Building Located on the Territory of Romania, with Certain Exceptions Regulated by the Fiscal Code. for Residential Buildings and Annex Buildings owned by Individuals, the Building Tax is Calculated by Applying a Rate between 0.08% and 0.2% on the Taxable Value of the Building. for Non-Residential Buildings owned by Individuals, the Tax is Calculated by Applying a Rate between 0.2% and 1.3% on the Taxable Amount of the Building. for Mixed-Purpose Buildings Owned by Individuals, the Tax is Calculated by Adding Together the Tax Calculated for the Area Used for Residential Purposes with the Tax Determined for the Area Used for Non-Residential Purposes. for Residential Buildings Owned or Held by Legal Entities, the Tax or the Building Tax is Calculated by Applying a Rate between 0.08% and 0.2% on the Taxable Value of the Buildings; and for Non-Residential Buildings the Tax or Tax on Buildings is Calculated by Applying a Rate between 0.2% and 1.3% Inclusive of the Taxable Value of the Building.
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Kavanagh, Claire, Eimear O'Dwyer, Róisín Purcell, Niamh McMahon, Morgan Crowe, and Michael Scott. "179 Evaluating a Clinical Pharmacist Service in a Residential Care Unit." Age and Ageing 48, Supplement_3 (September 2019): iii1—iii16. http://dx.doi.org/10.1093/ageing/afz102.40.
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Abstract Background This study assessed the pharmacist role in an 80 bed residential care unit by: Quantifying the number and type of pharmacist interventions made and their acceptance rate.Assessing impact of pharmacist interventions on patient care.Assessing staff attitudes towards the clinical pharmacist service. Methods This was a non-blinded, non-comparative evaluation of the existing clinical pharmacist service in the unit. All residents were included. All pharmacist interventions over a 10-week period were recorded, then graded according to the Eadon scale1 by a consultant gerontologist and an experienced pharmacist to assess their impact on patient care. Results There were 615 pharmacist interventions. The most common interventions were: Drug Therapy Review, 34% (n=209) Technical Prescription, 26.5% (n=163) Administration, 15.3% (n=94) Drug Interaction, 10.4% (n=64) Medication Reconciliation, 8.5% (n=52) 98% (n=596) of interventions were rated as having significance to patient care, of which: 48.4% (n=298) and 41.8% (n=257) of the interventions rated as ‘significant and resulting in an improvement in the standard of care’1% (n=6) and 0.5% (n=3) rated as ‘very significant and preventing harm’. There was a statistically significant agreement between the evaluators, κw = 0.231 (95% CI, 0.156 to 0.307), p < .0005. The strength of agreement was fair. Of interventions requiring acceptance by medical team (n=335), 89.9% (n=301) were accepted. 95% (n=36) of staff who responded agreed or strongly agreed that improved patient safety resulted from the pharmacist’s involvement in multidisciplinary medication reviews. Over 92% (n=35) agreed or strongly agreed that their experience of the pharmacist was positive. Conclusion The pharmacist has an important role in our residential care unit. Their involvement in the medicines optimisation process positively impacts patient outcomes and prevents harm. Staff perceived a positive impact of the clinical pharmacist service provided on patient care and patient safety.
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Sunarti, S., Nany Yuliastuti, Wido Prananing Tyas, and Dwi Putri Puspa Sari. "Penyediaan Fasilitas Hunian di Perumahan KORPRI Salatiga: Realita dan Konsep Neighborhood Unit." TATALOKA 22, no. 2 (May 29, 2020): 249–60. http://dx.doi.org/10.14710/tataloka.22.2.249-260.
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KORPRI housing in Salatiga City is one form of providing low-cost housing to overcome the backlog problem for civil servants who do not yet have a home. Since it was built in 2014, until now not 100% development has been realized, especially in the provision of residential facilities. It is important for an environment to be able to provide services and provide adequate facilities to meet the needs for the survival of the occupants. This study aims to examine the physical environment of housing based on the provision of facilities in KORPRI housing, Praja Mulia, in the perspective of a neighborhood unit as a physical structuring concept of an ideal residential environment. The method used is quantitative by using descriptive analysis techniques. Primary data collection techniques are carried out by means of observation and interpretation of images, secondary data derived from documents and literature studies related to KORPRI housing development. The results showed that based on the concept of neighborhood units, as cheap housing, Praja Mulia Housing with a planned population of 1,380 inhabitants had non-ideal neighborhood unit facilities. The existing facilities are only open spaces in 3 locations (3% of the total housing area) and other public facilities that are still planned. Novelti of this research housing for civil servants do not use environmental unit theory but only pay attention to the house as objects (nouns) used for investment and commodity. This condition creates a burden and becomes a challenge for the city and the surrounding area in providing facilities and services for residents who are not served in their neighborhood units.
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Zheng, Wu Xing, De Sheng Ju, and Shi Long Liu. "Analysis on Energy Efficiency and Consumption of Existing Residential Buildings in Shijiazhuang." Applied Mechanics and Materials 409-410 (September 2013): 557–60. http://dx.doi.org/10.4028/www.scientific.net/amm.409-410.557.
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Through the investigations on a total of 2,079 residential buildings in Shijiazhuang, the author got the distributions, ages, structures, heating and cooling patterns, indoor comfort conditions, state of energy efficiency and actual energy consumptions etc. In addition, non-energy-efficient buildings, energy-saving 30%, energy-saving 50% and energy-saving 65% accounted for 24.8%, 17.8%, 22.4% and 35.0% respectively. The author calculated the total energy consumption of 397 sample existing residential buildings which is equivalent to about 48,600 t Standard Coal, and average energy consumption per unit area was about 28.0 kg/m2. The results may contribute to the future work of energy efficiency renovation of existing residential buildings in Shijiazhuang, even the whole Hebei Province.
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Smith, Samantha, Jingjing Jiang, Charles Normand, and Ciaran O’Neill. "Unit costs for non-acute care in Ireland 2016—2019." HRB Open Research 4 (April 23, 2021): 39. http://dx.doi.org/10.12688/hrbopenres.13256.1.
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Background: This paper presents detailed unit costs for 16 healthcare professionals in community-based non-acute services in Ireland for the years 2016—2019. Unit costs are important data inputs for assessments of health service performance and value for money. Internationally, while some countries have an established database of unit costs for healthcare, there is need for a more coordinated approach to calculating healthcare unit costs. In Ireland, detailed cost analysis of acute care is undertaken by the Healthcare Pricing Office but to date there has been no central database of unit costs for community-based non-acute healthcare services. Methods: Unit costs for publicly employed allied healthcare professionals, Public Health Nurses and Health Care Assistant staff are calculated using a bottom-up micro-costing approach, drawing on methods outlined by the Personal Social Services Research Unit in the UK, and on available Irish and international costing guidelines. Data on salaries, working hours and other parameters are drawn from secondary datasets available from Department of Health, Health Service Executive and other public sources. Unit costs for public and private General Practitioner, dental, and long-term residential care (LTRC) are estimated drawing on available administrative and survey data. Results: The unit costs for the publicly employed non-acute healthcare professionals have changed by 2–6% over the timeframe 2016–2019 while larger percentage changes are observed in the unit costs for public GP visits and public LTRC (14-15%). Conclusions: The costs presented here are a first step towards establishing a central database of unit costs for non-acute healthcare services in Ireland. The database will help ensure consistency across Irish health costing studies and facilitate cross-study and cross-country comparisons. Future work will be required to update and expand on the range of services covered and to incorporate new data and methodological developments in cost estimation as they become available.
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Farghally, Hanaa M., Faten H. Fahmy, Amal A. Hassan, and Ninet M. Ahmed. "Design of a modified natural egyptian solar house." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 1 (February 1, 2020): 589. http://dx.doi.org/10.11591/ijece.v10i1.pp589-599.
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The rate of increase in energy consumption and high costs in addition to the depletion of existing resources has a significant impact on our standard of living for next generations. In this case, the priority is to develop alternative cost-effective sources for powering the residential and non-residential buildings. This paper proposes and develops a design of a modified small two-story residential solar house for a medium-sized family located in Cairo, Egypt. This modified solar house meets almost all its energy demands including space heating by using solar air collector with a pebble storage unit in winter and a summer cooling system using wind catcher theory. Hot water is obtained throughout the day by using a steel sheltered water storage tank with a capacity of 1000 liter. Finally, the proposed heating system of the solar house is sized and modeled.
Dissertations / Theses on the topic "Non-residential unit"
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Kramářová, Iva. "Zpracování metodiky pro dělení stavby na bytové a nebytové jednotky." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-232521.
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The main target was processing of methodology for dividing of building, into residential and non-residential units, and acquaint with jural operations which preceded this fact. There were also dealt with forms of property, problems and possibilities of dividing the apartment building on separate residential and non-residential units including examples of the declaration of building-owner, resolution of agreements and other necessary documents. Diploma thesis provides a comprehensive overview about problems with flat´s property which is arising from apartment-building dividing at residential units, so they can be self-contained property.
Books on the topic "Non-residential unit"
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Crombie, Lynn. Special care for people with dementia in non-specialist residential units: Two examples. Stirling: Dementia Services Development Centre, University of Stirling, 2000.
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Parker, Philip M. The 2007-2012 Outlook for Components Not Sold As Complete Units for Prefabricated Stationary Wood Non-Residential Buildings, Motels, and Hotels in Japan. ICON Group International, Inc., 2006.
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Parker, Philip M. The 2007-2012 Outlook for Components Not Sold As Complete Units for Prefabricated Stationary Wood Non-Residential Buildings, Motels, and Hotels in India. ICON Group International, Inc., 2006.
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Parker, Philip M. The 2007-2012 Outlook for Components Not Sold As Complete Units for Prefabricated Stationary Wood Non-Residential Buildings, Motels, and Hotels in Greater China. ICON Group International, Inc., 2006.
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Parker, Philip M. The 2007-2012 Outlook for Components Not Sold As Complete Units for Prefabricated Stationary Wood Non-Residential Buildings, Motels, and Hotels in the United States. ICON Group International, Inc., 2006.
Find full textBook chapters on the topic "Non-residential unit"
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Letesson, Quentin, and Carl Knappett. "Introduction—Minoan Built Environment: Past Studies, Recent Perspectives, and Future Challenges." In Minoan Architecture and Urbanism. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198793625.003.0006.
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Architecture and urbanism have been of constant interest to Minoan archaeologists since the beginning of the twentieth century. While there is some scholarly bias to this, with the field deeply affected by Sir Arthur Evans’s focus on the monumental architecture of Knossos, Minoan Crete continues to yield abundant evidence for a substantial built environment. Focusing on urban and architectural remains creates a strong bias in favour of one block of time, the Neopalatial period, which produced the largest amount of wellpreserved settlements and buildings. Yet, in general, the evidence we now have on the Minoan built environment is an undeniable resource, one that continues to grow thanks to ongoing studies of pre-existing remains as well as new excavation and survey projects. As is clear in Evans’s magnum opus, The Palace of Minos at Knossos, the large-scale excavations typical of the dawn of the last century were heavily directed towards the urban cores of the largest Minoan sites (e.g. Boyd Hawes et al. 1908; Hutchinson 1950). The bulk of what we know about the Minoan built environment comes from the first half of the twentieth century, initially through the intensive work of the foreign schools at Malia, Phaistos, Palaikastro, Gournia, Mochlos, and Pseira, later joined by countless excavations by Greek archaeologists. Yet, synthetic treatments really only began with the work of James Walter Graham, in the form of numerous papers published in the American Journal of Archaeology (see Letesson 2009 for a detailed review), and especially his Palaces of Crete (Graham 1962). Nonetheless, his comparative analyses, which also dealt with non-palatial buildings, were largely focused on polite architecture. With a particular interest in form and function, he built on Evans’s insights to be the first to identify, across a large sample of buildings, recurring architectural patterns in the Minoan built environment (e.g. Piano Nobile, residential quarters, banquet halls). His studies also included an innovative quantitative component, emphasizing the existence of a unit of length that builders would have used to lay out the palaces and some of the so-called ‘villas’.
Conference papers on the topic "Non-residential unit"
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Lakeh, Reza Baghaei, Daniel Andrade, Kyle Miller, Mohammad Masoud Modabernia, Thuan John Nguyen, Justine Nguyen, Elbon Flanagan, et al. "Design and Testing of a Solar-Driven Wastewater Treatment Unit for Off-Grid Applications." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87090.
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The decline of surface water sources along with periodic droughts has introduced new challenges for the state of California. In order to keep up with the increasing demand for water, the state is heavily relying on imported water from the north to Southern California as well as importing water from the Colorado River. The imported water has a large carbon footprint due to using grid power for water transport. Water reuse (reclaimed) is considered as one of the solutions to reduce the dependency of state on imported water. The research team at Cal Poly Pomona, is developing an off-grid solar-powered greywater treatment system for non-potable use in single households. Greywater is the drained water from bathroom sinks, showers, tubs, and washing machines; not including wastewater from toilets or kitchen sinks. Treating greywater on-site can provide significant water savings, and can reduce the carbon footprint of desalination using solar panels. The developed system is comprised of a three-stage treatment train: micro-filtration, solar-driven reverse osmosis, and ultraviolet disinfection. The end product of the project is capable of reclaiming 90–100 gallons of water per day which is about 60% of residential greywater waste. The system removes large suspended particles (particles of dirt, food, etc.) as well as organic and inorganic dissolved contaminants. It is demonstrated that the system can provide a permeate quality that agrees with recommended guidelines for reclaimed water. The system has a recovery rate of up to 62%.
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Qiu, Waishan, Xiaokai Huang, Xiaojiang Li, Wenjing Li, and Ziye Zhang. "Investigating the impacts of street environment on pre-owned housing price in Shanghai using street-level images." In CARMA 2020 - 3rd International Conference on Advanced Research Methods and Analytics. Valencia: Universitat Politècnica de València, 2020. http://dx.doi.org/10.4995/carma2020.2020.11410.
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Studies considering street environment quality’s impact on housing value were limited to top-down variables such as the green ratio measured from satellite maps. In contrast, this study quantified street views’ impacts on the value of second-hand commodity residential properties in Shanghai based on analysis of street view imagery. (1) It applied computer vision to objectively measure street features from largely accessible street view imagery. (2) Based on the classical urban design measures frameworks, it applied machine learning to evaluate human perceived street quality as street scores systematically, in contrast to the common practice of doing so in a more intuition-based fashion. (3) It further identified important indicators from both human-centered street scores as well as the more objective street feature measures with positive or adverse effects on property values based on a hedonic modeling method. The estimation suggested both street scores and features are significant and non-negligible. For the perceived street scores (from 0-10 scale), neighborhoods with a unit increase in their “enclosure” or “safety” score enjoy price premium of 0.3% to 0.6%. Meanwhile, streets with 10% greater tree canopy exposure are attributable to a 0.2% increase in the property value. This study enriched our current understanding at a micro level of the factors that impact property values from the perspective of the built environment. It introduced human-centered perception of street scores and objective measures of street features as spatial variables into the analysis of neighborhood attribute vectors.
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Lea˜o, C. P., S. F. C. F. Teixeira, A. M. Silva, M. L. Nunes, and L. A. S. B. Martins. "Thermo-Economic Optimization in the Design of Small-Scale and Residential Cogeneration Systems." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-13089.
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In recent years, gas-turbine engines have undergone major improvements both in efficiency and cost reductions. Several inexpensive models are available in the range of 30 to 250 kWe, with electrical efficiencies already approaching 30%, due to the use of a basic air-compressor associated to an internal air pre-heater. Gas-turbine engines offer significant advantages over Diesel or IC engines, particularly when Natural Gas (NG) is used as fuel. With the current market trends toward Distributed Generation (DG) and the increased substitution of boilers by NG-fuelled cogeneration installations for CO2 emissions reduction, small-scale gas turbine units can be the ideal solution for energy systems located in urban areas. A numerical optimization method was applied to a small-scale unit delivering 100 kW of power and 0.86 kg/s of water, heated from 318 to 353K. In this academic study, the unit is based on a micro gas-turbine and includes an internal pre-heater, typical of these low pressure-ratio turbines, and an external heat recovery system. The problem was formulated as a non-linear optimisation model with the minimisation of costs subject to the physical and thermodynamic constraints. Despite difficulties in obtaining data for some of the components cost-equations, the preliminary results indicate that the optimal compressor pressure ratio is about half of the usual values found in large installations, but higher than those of the currently available micro-turbine models, while the turbine inlet temperature remains virtually unchanged.
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Tuffner, Francis, and Ruchi Singh. "Analysis of Distribution Feeder Losses due to Addition of Distributed Photovoltaic Generators." In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54792.
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Distributed generators (DG) are small scale power supplying sources owned by customers or utilities and scattered throughout the power system distribution network. Distributed generation can be both renewable and non-renewable. Addition of distributed generation is primarily to increase feeder capacity and to provide peak load reduction. However, this addition comes with several impacts on the distribution feeder. Several studies have shown that addition of DG leads to reduction of feeder loss. However, most of these studies have considered lumped load and distributed load models to analyze the effects on system losses, where the dynamic variation of load due to seasonal changes is ignored. It is very important for utilities to minimize the losses under all scenarios to decrease revenue losses, promote efficient asset utilization, and therefore, increase feeder capacity. This paper will investigate an IEEE 13-node feeder populated with photovoltaic generators on detailed residential houses with water heater, Heating Ventilation and Air conditioning (HVAC) units, lights, and other plug and convenience loads. An analysis of losses for different power system components, such as transformers, underground and overhead lines, and triplex lines, will be performed. The analysis will utilize different seasons and different solar penetration levels (15%, 30%).
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Carey, Van P. "Assessment of Tesla Turbine Performance for Small Scale Solar Rankine Combined Heat and Power Systems." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10814.
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For solar Rankine cycle combined heat and power systems for residential buildings and other small-scale applications (producing 1–10 kWe), a low manufacturing cost, robust and durable expander is especially attractive. The Tesla turbine design has these desired features. This paper summarizes a theoretical exploration of the performance of a Tesla Turbine as the expander in a small-scale Rankine cycle combine heat and power system. A one-dimensional idealized model of momentum transfer in the turbine rotor is presented which can be used to predict the efficiency of the turbine for typical conditions in these systems. The model adopts a non-dimensional formulation that identifies the dimensionless parameters that dictate performance features of the turbine. The model is shown to agree well with experimental performance data obtained in earlier tests of prototype Tesla turbine units. The model is used to explore the performance of this type of turbine for Rankine cycle applications using water as a working fluid. The model indicates that isentropic efficiencies above 0.70 can be achieved if the operating conditions are tailored in an optimal way. The scalability of the turbine design, and the impact of the theoretical model predictions on development of solar combined heat and power systems are also discussed.
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Ferreira, Ana C., Senhorinha Teixeira, Manuel L. Nunes, and Luís B. Martins. "Numerical Study of Regenerator Configuration in the Design of a Stirling Engine." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38529.
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The sustainable development involves the rational use of energy, by satisfying energy demands without compromising the safety of future supply. The use of renewable energy sources together with combined heat and power systems is currently considered a priority in Europe. The market trends are evolving to decentralized energy conversion with the increasing replacement of boilers and other conventional systems by small and micro-scale cogeneration units, able to produce the same amounts of useful energies. Micro scale cogeneration systems have been developed as ideal solutions to meet the energy needs for the building sector. These technologies, which include the Stirling engines, allow the production of high quality electricity and heat, efficiently and close to the final point of use. Stirling engines seem to be a good alternative for residential energy conversion. The main objective of this paper is to study alternative configurations for the regenerator of an alpha Stirling engine and evaluate the overall performance of the system. Numerical simulations were performed via a MatLab® code that includes the thermodynamic cycle analysis accounting for the effects of non-ideal heat exchangers and pumping losses. Based on a previously developed costing methodology, the investment purchase cost for each configuration is also estimated. Results showed that, for mean pressure values above 30 bar, the Stirling engine efficiency is higher for a regenerator with a wired mesh matrix rather than with a wrapped foil matrix. This is due both to better heat transfer and to lower pumping losses with the wired mesh configuration. The capital cost of the system was calculated and showed that the heater and the engine bulk are the most expensive components.