Papers by Keyword: Solar Water Heating System

Abstract: The current thesis proposed the integration of air conditioners that exhaust heat with solar energy to enhance the overall efficiency of thermal energy conversion. The analysis of thermal storage tanks of different volumes revealed that a two-ton air conditioner operating for an hour produced double energy than normal sunshine for a day. With thermal storage tanks of fixed volume, the integration of air conditioners of different tons with solar energy indicated that air conditioners of less tons produced faster and more efficient energy conversion. Therefore, the current thesis proposed that the modification of condenser in domestic air conditioner into water-cooled condenser not only enhanced the energy efficiency of air conditioners but also increased hot water supplies since hot water from air conditioners could be integrated into solar water heaters. By doing so, energy conservation and carbon reduction could be achieved.

Abstract: The daily collected heat energy of solar collector in solar water heating system is calculated by the modeling of solar collector and stratified tank, and the result is verified by experiments. Through analysis of the calculation results, the simplified formula for calculating the daily collected heat energy is given. Using this simplified formula, the daily collected heat energy under different flow rates is calculated. The result shows that the daily collected heat energy of solar collector running in solar water heating system tends to stable when the flow rate above 0.005kg/(m².s).

Abstract: The objective of this work is to do theoretically investigation about the solar fraction changing laws affected by some factors, so that we can do optimization for solar system designing, specially for household solar water heating system. The calculation of solar fraction was established on a more effective day-to-day simulation model rather than traditional method. It is found that the collector area and the water storage tank volume are the main influence factors. Economic analysis by means of lifecycle cost savings evaluation was carried out based on the calculated model.

Abstract: This paper presents a multiple case study concerning to the Integrated Product Development Process (IPDP) that involves the concepts of environmental sustainability and social inclusion to build solar water heating system made of discarded and recyclable materials in a way that People with Visual deficiency (PwVD) can participate in its manufacturing. This research proposes that Engineering courses in a near future adopt the aspect of Citizenship Education systematically, contextualizing environmental impact reduction and social inclusion of people with disabilities. The technical procedure of the study was delineated according to IPDP phases defined in two multidisciplinary strands leading to raw materials data collection through recycling and manufacturability with accessibility process to develop the product prototype. The analysis of the results presents the tooling developed for manufacturing with accessibility of people with visual impairments and the efficiency of the prototype installed. At the end, it is placed the relevant notes observed during the research and sustainable assignments in social and environmental dimensions for the education of engineering professionals.

Abstract: With the acceleration of urbanization, high-rise residential buildings have dominated the present residential buildings in which it has become an irreversible trend to apply the solar water heating systems. Taking the common layout models of the high-rise residential buildings in Jinan City as examples, this paper will create models with the help of sunlight analysis software TSUN8.0 to make a simulation analysis of the valid sunlight hours of the southern facade in these buildings, in the premise that they are in line with the planning requirements, thus we may work out reasonable layout programs for the solar water heating systems application into the facade of high-rise residential buildings under different layouts, which can provide the architects with basis in the design of integrating the buildings with the system.

Abstract: This paper analyzes surveys of domestic hot-water use in three Chinese cities (Shanghai, Hangzhou, Guilin). The survey results reveal that the ratio of solar hot water in domestic hot-water uses is less than 20%. Use patterns of hot water are different from different seasons and locations. This suggests that the amount of daily hot-water consumption should be determined by local climatic and economic conditions. From successfully-completed construction projects, the integrated design guidelines for high-rise residential buildings are also provided in the paper.

Abstract: This paper describes surveys on high-rise residential buildings development and uses of domestic hot water in China. The survey results indicate that construction of high-rise residential buildings has become the main current in the development of residential construction. The application of the integrated solar hot-water system in high-rise residential buildings is reviewed, and optimal system design is described in the paper. A discussion is also provided on technical subjects and issues in the future application of the integrated solar hot-water system to high-rise residential buildings. As a conclusion, the central-heating/separate-storing system would be one of currently applicable integrated solar hot-water systems in China.

Abstract: In this paper, a novel solar water heating system will be proposed by applying the loop heat pipe to a conventional split solar hot water system, which will have the characteristics of high efficiency, low cost, appearance appealing and building integration. Three types of the system, i.e., the system with evacuated tubes, with single flat-plate glazing cover, and without glazing, will be experimentally investigated and compared on the influence to the dynamic performance of the system. It was found that the system’s operating temperature increased significantly during the start-up stage and gently after until reach relatively constant. The instantaneous efficiency was found to be fluctuated, although it reached stable eventually during the operations for all three types. By using the moving average calculating method, every 10 minutes were applied for the calculation of the average efficiency which had a negative linear relation with the combined factor of (T_mean-T_amb)/I. In general, the solar system with evacuated tubes performed the best with the highest water temperature output, highest system efficiency and lowest heat loss coefficient among the three systems.

Abstract: Starting from the present situation of energy in China, we discuss how to improve building energy efficiency through comprehensive utilization of solar-energy (SE). Moreover, we study how to adapt the multi-function system for SE, which not only can be used for solar refrigeration but also for solar heating and hot water supply.

Abstract: This article analyzes the problem in application the solar system was used in residential building, puts forward the requirements to use energy and choose the setting of the solar energy collector from two aspects of building and drainage design respectively. In addition, the article explicates andthe solar energy collector and building integrated design and the development of solar energy collector. At last, the article puts forward some Suggestions on the improvement and development of residential solar hot water system and the design of the hot water supply bath solution of practice to make solar energy and low power assisted by night combining.