Moving forward with building-scale alternative energy: Performance, price, and policy

2009 ◽  
Author(s):  
David Bristow ◽  
Chris A. Kennedy
Keyword(s):  
Alternative Energy ◽  
Energy Performance ◽  
Scale Alternative

scholarly journals Empirical base solar reflective array accumulator design simulator

2018 ◽  
Vol 197 ◽  
pp. 11017
Author(s):  
Budhy Setiawan ◽  
Riska Nur Wakidah ◽  
P Raden Edy ◽  
D Annisa Maulidia ◽  
Yulianto Yulianto ◽  
...  
Keyword(s):  
Alternative Energy ◽  
Water Mass ◽  
Energy Performance ◽  
Heat Energy ◽  
Egg Hatching ◽  
Environment Temperature ◽  
Temperature Environment ◽  
Trapping Method ◽  
Opening And Closing ◽  
And Control

Sun energy in Indonesia is 5Kwh/m2/day average per year. This alternative energy can be convert to solar thermal up to 80% efficiency, the percentage is highly significant compare to electric conversion that only has 20%. To provide any process requirement for heating, an empirical research of reflective array accumulator has been done, so that a design simulation for the accumulator has to be held. The accumulator can be used as a heat energy supplier for drying, egg hatching, food oven and other requirement. The sun energy trapping method is a reflective array. This method aims to maximize the energy captured and stored in an accumulator and has to be maintained for 24 hours by opening and closing the array. This simulator will calculated and control some input such as water mass, accumulator temperature, environment temperature, humidity and sun intensity. The array control performance to watch diffuse solar light intensity by time. The result of the simulation will give absorption storage capability, insulation capability to watch sun energy performance per day. It is expected that with the simulation, it can simplify the design of the accumulator and improve the efficiency of heat energy storage. The absorption capability perform 72%.

Proposed Sustainable Design Alternatives for Low-Income and Middle-Income Housing in a Coastal Area in a Developing Country

2011 ◽  
Author(s):  
Marta Lalyvette Calderon ◽  
Victor Hugo Guardado ◽  
Francisco Eduardo Guevara ◽  
Luis Aaron Martinez ◽  
Gabriel Ricardo Molina ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Thermal Comfort ◽  
Low Income ◽  
Alternative Energy ◽  
Energy Performance ◽  
Passive Cooling ◽  
Modeling Tools ◽  
Middle Income ◽  
Housing Design ◽  
Design Alternatives

Developing nations face increasing economic and environmental challenges and the search for housing design solutions that approach sustainability by meeting thermal comfort, energy efficiency, environmental and low initial cost criteria is underway. This paper presents the results of a multidisciplinary research project that aimed at designing a low-income house and a middle-income house that perform well from the architectural, thermal comfort, and energy efficiency standpoint while being cost-competitive. Multiple passive cooling strategies were considered and evaluated by energy modeling tools. The thermal and energy performance of the proposed designs were analyzed throughout the design process and the various design iterations. A full budget was prepared for the proposed low-income housing design and first-costs were found to be competitive with conventional housing. The paper discusses the proposed design features, their impact on thermal comfort and energy efficiency and the feasibility of integrating alternative energy systems to the proposed designs.

scholarly journals ENERGIJOS ŠALTINIŲ PARINKIMO ĮTAKA PASTATO ENERGINIAM NAUDINGUMUI / IMPACT OF ENERGY SOURCES SELECTION FOR ENERGY PERFOMANCE OF BUILDING

2018 ◽  
Vol 10 (0) ◽  
pp. 1-6
Author(s):  
Rūta Mikučionienė ◽  
Vygantas Žėkas
Keyword(s):  
Energy Production ◽  
Alternative Energy ◽  
Production Systems ◽  
Building Energy ◽  
Energy Performance ◽  
Heat Pumps ◽  
Solar Photovoltaic ◽  
Energy Demands ◽  
Zero Energy Building ◽  
Selection For

The article analyzes energy supply alternatives for administrative nearly zero energy building in Kaunas. Alternative energy production systems such as biofuel boiler, condensing boiler, heat pumps (air-water and groundwater), solar photovoltaic, solar collectors and combinations of these systems are analysed. The simulation of analysed building energy demands has been made using DesignBuilder modelling software and modelling of energy production alternatives has been performed using energyPRO software. In order to determine the optimal energy production alternative, the combinations of technologies are compared by energetic and ecological indicators and influence of each combination on the energy performance class is assessed. Santrauka Vis griežtėjantys Europos Sąjungos reikalavimai pastatų sektoriuje reikalauja efektyvesnių ir ekologiškesnių sprendimų aprūpinant pastatus energija, todėl būtina ieškoti geriausių aprūpinimo energija variantų juos įvertinant keliais kriterijais. Tiriamos administracinio beveik nulinės energijos pastato šios aprūpinimo energija technologijos: biokuro katilas, kondensacinis dujų katilas, šilumos siurbliai (gruntas–vanduo ir oras–vanduo), šalčio mašina, centralizuoti šilumos tinklai, saulės elementai ir saulės kolektoriai. Pastato poreikiai modeliuojami DesignBuilder, o aprūpinimo energija technologijų deriniai modeliuojami energyPRO modeliavimo programa. Siekiant nustatyti optimalų aprūpinimo energija variantą, technologijų deriniai yra lyginami pagal energinį ir ekologinį rodiklius ir įvertinama kiekvieno derinio įtaka pastato energinio naudingumo klasei.

scholarly journals PREVISÃO DE PERFORMANCE ENERGÉTICA POR MEIO DE SIMULAÇÃO TRANSIENTE DE UM SISTEMA CSP COM TORRE CENTRAL INTEGRADO A ATIVIDADES AGROINDUSTRIAIS

2018 ◽  
Vol 33 (3) ◽  
pp. 264-269
Author(s):  
Pedro Henrique Silva Bezerra ◽  
Odivaldo José Seraphim ◽  
Celso Eduardo Lins De Oliveira
Keyword(s):  
Energy Demand ◽  
Alternative Energy ◽  
Energy Performance ◽  
Sao Paulo ◽  
Solar Irradiation ◽  
São Paulo ◽  
Concentrated Solar Power ◽  
Dairy Consumption ◽  
Central Receiver ◽  
Installed Capacity

Para demonstrar o funcionamento da tecnologia CSP, é de fundamental importância a simulação dos processos por meio de ferramentas computacionais, que permitem a previsão do desempenho energético. O objetivo dessa pesquisa foi obter o desempenho energético de uma usina CSP com receptor central, com capacidade instalada de 70kWel, integrado a sistemas agroindustriais em São Paulo. A pesquisa se baseou na criação de um modelo de sistema CSP, para geração de eletricidade, acoplados a um Matadouro e Laticínio. As análises foram realizadas com do uso da ferramenta computacional TRNSYS. Os resultados prévios oriundos das simulações foram em resposta à irradiação solar. Nas melhores épocas do ano em que a radiação é mais frequente e intensa, foi-se registrado valores acima de 1000 W/m², sendo que durante o ano, o valor integral obtido foi 1.957,73 kW/m²/ano. Os valores de eficiência óptica obtidos alcançaram a ordem de 45%. A eficiência média de conversão do calor proveniente do sol em eletricidade do ciclo foi 18%. Durante o dia, a potência líquida da turbina foi de aproximadamente 30 kWe, sendo que o valor de geração anual integrado foi na ordem de 108.618 kWh/ano. Ao aplicar os valores de geração obtidos no perfil do consumo do Laticínio, os resultados apontaram que em um dia de geração, considerável bom com 10 horas de irradiação, a planta supriria 60% da demanda energética. O sistema pode ser analisado como uma alternativa de eficiência energética com aplicação da resolução ANEEL 482/2012. Palavras-chave: Energia Solar Concentrada; sistema CSP com torre central; desempenho energético.   ENERGY PERFORMANCE PREDICTION BY TRANSIENT SIMULATION OF A CSP SYSTEM WITH CENTRAL TOWER INTEGRATED TO AGRO-INDUSTRIAL ACTIVITIES   ABSTRACT: To demonstrate the operation of CSP technology is fundamental to simulate the processes by computational tools, which allow prediction of energy performance. The objective of this research was obtain the energy performance of CSP plant with central receiver, with installed capacity of 70kWel, integrated an agribusiness systems in São Paulo. The research was based on the creation of a model of CSP system, for electricity generation, coupled to a Slaughterhouse and Dairy. The analyzes were performed with the use of the computational tool TRNSYS. The previous results from the simulations were in response to solar irradiation. In the best times of the year when radiation is more frequent and intense, values above 1000 W / m² were recorded, and during the year the total value obtained was 1.957.73 kW / m² / year. The average efficiency heat conversion from the sun into electricity cycle was 18%. During the day, the net power of the turbine was approximately 30 kWe, and the integrated annual generation value was in the order of 108,618 kWh / year. By applying the generation of values obtained in Dairy consumption profile, the results showed that a day generation, with considerable good 10 hours of irradiation, the plant would supply 60% of the energy demand. The system can be analyzed as an alternative energy solution with the application of ANEEL resolution 482/2012. KEYWORDS: Concentrated Solar Power; CSP system with central tower; performance.

scholarly journals PREVISÃO DE PERFORMANCE ENERGÉTICA POR MEIO DE SIMULAÇÃO TRANSIENTE DE UM SISTEMA CSP COM TORRE CENTRAL INTEGRADO A ATIVIDADES AGROINDUSTRIAIS

2018 ◽  
Vol 33 (3) ◽  
pp. 255-260
Author(s):  
Pedro Henrique Silva Bezerra
Keyword(s):  
Energy Demand ◽  
Alternative Energy ◽  
Energy Performance ◽  
Sao Paulo ◽  
Solar Irradiation ◽  
São Paulo ◽  
Concentrated Solar Power ◽  
Dairy Consumption ◽  
Central Receiver ◽  
Installed Capacity

Para demonstrar o funcionamento da tecnologia CSP, é de fundamental importância a simulação dos processos por meio de ferramentas computacionais, que permitem a previsão do desempenho energético. O objetivo dessa pesquisa foi obter o desempenho energético de uma usina CSP com receptor central, com capacidade instalada de 70kWel, integrado a sistemas agroindustriais em São Paulo. A pesquisa se baseou na criação de um modelo de sistema CSP, para geração de eletricidade, acoplados a um Matadouro e Laticínio. As análises foram realizadas com do uso da ferramenta computacional TRNSYS. Os resultados prévios oriundos das simulações foram em resposta à irradiação solar. Nas melhores épocas do ano em que a radiação é mais frequente e intensa, foi-se registrado valores acima de 1000 W/m², sendo que durante o ano, o valor integral obtido foi 1.957,73 kW/m²/ano. Os valores de eficiência óptica obtidos alcançaram a ordem de 45%. A eficiência média de conversão do calor proveniente do sol em eletricidade do ciclo foi 18%. Durante o dia, a potência líquida da turbina foi de aproximadamente 30 kWe, sendo que o valor de geração anual integrado foi na ordem de 108.618 kWh/ano. Ao aplicar os valores de geração obtidos no perfil do consumo do Laticínio, os resultados apontaram que em um dia de geração, considerável bom com 10 horas de irradiação, a planta supriria 60% da demanda energética. O sistema pode ser analisado como uma alternativa de eficiência energética com aplicação da resolução ANEEL 482/2012.Palavras-chave: Energia Solar Concentrada; sistema CSP com torre central; desempenho energético. ENERGY PERFORMANCE PREDICTION BY TRANSIENT SIMULATION OF A CSP SYSTEM WITH CENTRAL TOWER INTEGRATED TO AGRO-INDUSTRIAL ACTIVITIES ABSTRACT: To demonstrate the operation of CSP technology is fundamental to simulate the processes by computational tools, which allow prediction of energy performance. The objective of this research was obtain the energy performance of CSP plant with central receiver, with installed capacity of 70kWel, integrated an agribusiness systems in São Paulo. The research was based on the creation of a model of CSP system, for electricity generation, coupled to a Slaughterhouse and Dairy. The analyzes were performed with the use of the computational tool TRNSYS. The previous results from the simulations were in response to solar irradiation. In the best times of the year when radiation is more frequent and intense, values above 1000 W / m² were recorded, and during the year the total value obtained was 1.957.73 kW / m² / year. The average efficiency heat conversion from the sun into electricity cycle was 18%. During the day, the net power of the turbine was approximately 30 kWe, and the integrated annual generation value was in the order of 108,618 kWh / year. By applying the generation of values obtained in Dairy consumption profile, the results showed that a day generation, with considerable good 10 hours of irradiation, the plant would supply 60% of the energy demand. The system can be analyzed as an alternative energy solution with the application of ANEEL resolution 482/2012.KEYWORDS: Concentrated Solar Power; CSP system with central tower; performance.

Impact of roof shading on building energy performance in warm & humid climatic places of India

2020 ◽  
pp. 50-64
Author(s):  
Kuladeep Kumar Sadevi ◽  
Avlokita Agrawal
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Energy Performance ◽  
General Assumption ◽  
Climatic Conditions ◽  
Building Envelope ◽  
Passive Cooling ◽  
Base Case ◽  
U Value ◽  
The Impact

With the rise in awareness of energy efficient buildings and adoption of mandatory energy conservation codes across the globe, significant change is being observed in the way the buildings are designed. With the launch of Energy Conservation Building Code (ECBC) in India, climate responsive designs and passive cooling techniques are being explored increasingly in building designs. Of all the building envelope components, roof surface has been identified as the most significant with respect to the heat gain due to the incident solar radiation on buildings, especially in tropical climatic conditions. Since ECBC specifies stringent U-Values for roof assembly, use of insulating materials is becoming popular. Along with insulation, the shading of the roof is also observed to be an important strategy for improving thermal performance of the building, especially in Warm and humid climatic conditions. This study intends to assess the impact of roof shading on building’s energy performance in comparison to that of exposed roof with insulation. A typical office building with specific geometry and schedules has been identified as base case model for this study. This building is simulated using energy modelling software ‘Design Builder’ with base case parameters as prescribed in ECBC. Further, the same building has been simulated parametrically adjusting the amount of roof insulation and roof shading simultaneously. The overall energy consumption and the envelope performance of the top floor are extracted for analysis. The results indicate that the roof shading is an effective passive cooling strategy for both naturally ventilated and air conditioned buildings in Warm and humid climates of India. It is also observed that a fully shaded roof outperforms the insulated roof as per ECBC prescription. Provision of shading over roof reduces the annual energy consumption of building in case of both insulated and uninsulated roofs. However, the impact is higher for uninsulated roofs (U-Value of 3.933 W/m2K), being 4.18% as compared to 0.59% for insulated roofs (U-Value of 0.33 W/m2K).While the general assumption is that roof insulation helps in reducing the energy consumption in tropical buildings, it is observed to be the other way when insulation is provided with roof shading. It is due to restricted heat loss during night.

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