Optimizing Energy Consumption of Hot Water System in Buildings with Solar Thermal Systems

The main objective of this research was to produce a simulated model that permitted the evaluation of operating costs of commercial greenhouse tomato growers with respect to heating methods (hot air, hot water, radiant and heat pumps) and the use of artificial lighting for 1991 and 1992. This research showed that the main factors that negatively influence profitability were energy consumption during cold periods and the price of tomatoes during the summer season. The conventional hot water system consumed less energy than the heat pump system and produced marketable fruit yields similar to those from the heat pump system. The hot water system was generally more profitable in regards to energy consumption and productivity. Moreover, investment costs were less; therefore, this system gives best overall financial savings. As for radiant and hot air systems, their overall financial status falls between that of the hot water system and the heat pump. The radiant system proved to be more energy efficient that the hot air system, but the latter produced a higher marketable fruit yield over the 2-year study.

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Energy Consumption Analysis of Animation-Park in Sino-Singapore Tianjin Eco-City

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.316-317.176 ◽

2013 ◽

Vol 316-317 ◽

pp. 176-180 ◽

Cited By ~ 1

Author(s):

Xue Jing Zheng ◽

Meng Jun Yang ◽

Wan Dong Zheng ◽

Yun Kun Bu

Keyword(s):

Renewable Energy ◽

Energy Consumption ◽

Water System ◽

Energy System ◽

Living Environment ◽

Hot Water ◽

Solar Pv ◽

Pump System ◽

Heat Pump System ◽

Save Energy

Sino-Singapore Tianjin Eco-city is a strategic cooperation project between China and Singapore to improve the living environment and build an eco-culture. Animation-park covers an area of 1 km2, with a total construction area of 7.7x105m2. Wide sources of the renewable energy, such as solar hot water system, ground source heat pump system, solar PV power generation system, and deep geothermal energy system, is strongly recommended to use in eco-city in order to save energy and protect the environment. The usage of renewable energy is seen as a complement to the conventional energy. The energy consumption of the animation park is 42926tce of coal per year, and the renewable energy that used is 4573.6tce of coal per year. The usage of renewable energy leads to the reduction in the emission of CO2 of 18895.9t per year.

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Aplicaciones del Captador Solar de Placa Plana y del Captador de Tubo de Vacío en la Edificación = Applications of the Flat Plate Solar Collectors and the Vacuum Tube Solar Collectors in Building

Anales de Edificación ◽

10.20868/ade.2018.3797 ◽

2018 ◽

Vol 4 (3) ◽

pp. 25 ◽

Cited By ~ 1

Author(s):

Daniel Ferrández ◽

Carlos Moron ◽

Jorge Pablo Díaz ◽

Pablo Saiz

Keyword(s):

Flat Plate ◽

Solar Collector ◽

Energy Demand ◽

Hot Water ◽

Solar Thermal ◽

Solar Collectors ◽

Thermal Systems ◽

Vacuum Tube ◽

Solar Thermal Collectors ◽

Flat Plate Solar Collector

ResumenEl actual Código Técnico de la Edificación (CTE) pone de manifiesto la necesidad de cubrir parte de la demanda energética requerida para el abastecimiento de agua caliente sanitaria y climatización de piscinas cubiertas mediante sistemas de aprovechamiento de la energía solar térmica. En este artículo se presenta una comparativa entre las dos principales tipologías de captadores solares térmicos que existen en el mercado: el captador de placa plana y el captador de tubo de vacío, atendiendo a criterios de fracción solar, diseño e integración arquitectónica. Todo ello a fin de discernir en qué circunstancias es más favorable el uso de uno u otro sistema, comparando los resultados obtenidos mediante programas de simulación con la toma de medidas in situ.AbstractThe current Technical Building Code (CTE) highlights the need to cover part of the energy demand required for the supply of hot water and heating of indoor swimming pools using solar thermal systems. This article presents a comparison between the two main types of solar thermal collectors that exist in the market: the flat plate solar collector and the vacuum tube solar collector, according to criteria of solar fraction, design and architectural integration. All of this in order to discern in what circumstances the use of one or the other system is more favourable, comparing the results obtained through simulation programs with the taking of measurements in situ.

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A Multicriteria Methodology to Select the Best Installation of Solar Thermal Power in a Family House

Energies ◽

10.3390/en13051047 ◽

2020 ◽

Vol 13 (5) ◽

pp. 1047 ◽

Cited By ~ 3

Author(s):

Jaroslav Košičan ◽

Miguel Ángel Pardo ◽

Silvia Vilčeková

Keyword(s):

Energy Consumption ◽

Energy Production ◽

Thermal Power ◽

Research Work ◽

Hot Water ◽

Solar Thermal ◽

Solar Panels ◽

Solar Thermal Power ◽

Geographical Latitude ◽

Family House

Solar thermal power is nowadays one of the trendiest topics in the construction industry, and it represents a valuable energy source of heating that reduces energy consumption. As solar panels produce heating during the day and consumers demand calefaction during the whole day, we use standby tanks (for domestic hot water) and buffer tanks (for heating) for storage. The latest developments improved the efficiency and useful life while reducing the volume of tanks. So, the presented research work deals with analyzing the solar thermal power in a family house. This work presents a method to create a decision support system to compare solar energy systems in houses from economical, technical, availability, and environmental concerns. The weights of the criteria selected considering the analytical hierarchy process are computed. Parameters required for energy production calculations (location, temperature, etc.) and energy consumption (inhabitants, outdoor temperature, etc.) are summarized. It can be stated that a universal best solar thermal scheme does not exist, as energy consumption depends on the other features and limits as well as energy production, geographical latitude of the location, and so forth. According to results, Case 3 (a gas boiler and a combination tank) is the best alternative for reducing the energy required, CO2 emitted, the best energy efficiency of the installation, and the lowest transmission losses. In other scenarios when the economic criteria are not so relevant, this should be the best case in the prioritization scheme.

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Lessons learned from recommissioning a public office building

MATEC Web of Conferences ◽

10.1051/matecconf/201817504029 ◽

2018 ◽

Vol 175 ◽

pp. 04029

Author(s):

Yuyang Miao ◽

Chenggang Liu ◽

Xinjiang Huang

Keyword(s):

Energy Consumption ◽

Energy Saving ◽

Water System ◽

Lessons Learned ◽

Hot Water ◽

Office Building ◽

Hvac System ◽

Public Office ◽

Control Scheme ◽

Actual Energy Consumption

Energy consumption of HVAC system play a big role on the whole building energy usage. Recommissioning on HVAC system can improve build comfort and its performance. Taking the recommissioning of public office as an example, the issue of the energy consumption of HVAC system was found, control scheme of chilled and hot water system and AHUs was optimized, the new energy saving control scheme was determined, and the actual energy consumption was analysed. The result show that recommissioning for the public office building achieved obviously effect, and the rate of energy saving is 18%, 33% and 10% for chilled water, hot water and electricity, respectively.

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The Energy and Environmental Performance of a Project Using Solar Hot Water System with Vacuum Tube Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.771.155 ◽

2013 ◽

Vol 771 ◽

pp. 155-158

Author(s):

Zu Shan Hu ◽

Jian Yao

Keyword(s):

Energy Consumption ◽

Carbon Emissions ◽

Environmental Performance ◽

Water System ◽

Payback Period ◽

Hot Water ◽

Water Application ◽

Vacuum Tube

This paper calculates the energy and environmental performance of a project with solar hot water system using solar hot water system with vacuum tube materials. The results show that solar hot water application in buildings not only saves energy consumption but also reduces carbon emissions, and the dynamic payback period is about 12 years. Thus solar hot water system should be widely used in buildings in China.

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