Study on the Optimal Solar Fraction of Solar Water Heating System Combined with Heat Pump Unit for Hot Water Supply in Residential Buildings

2011 ◽  
Author(s):  
Zhiwei Wang ◽  
Zhijie Gao ◽  
Jifeng Zhao ◽  
Zunyi Xue
Keyword(s):  
Heat Pump ◽  
Residential Buildings ◽  
Heating System ◽  
Hot Water ◽  
Pump Unit ◽  
Solar Water Heating ◽  
Solar Fraction ◽  
Heat Pump Unit ◽  
Hot Water Supply ◽  
Solar Water Heating System

Problem about Solar Water Heating System and Residential Building Integrated

2012 ◽  
Vol 193-194 ◽  
pp. 30-33
Author(s):  
Xue Ying Wang ◽  
Dong Xu ◽  
Ya Jun Wu
Keyword(s):  
Solar Energy ◽  
Integrated Design ◽  
Water System ◽  
Residential Building ◽  
Heating System ◽  
Hot Water ◽  
Solar Water Heating ◽  
Drainage Design ◽  
Hot Water Supply ◽  
Solar Water Heating System

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.

scholarly journals Economic assessment and optimizing of the solar water heating system

2018 ◽  
Vol 210 ◽  
pp. 02023
Author(s):  
Jan Skovajsa ◽  
Martin Zálešák
Keyword(s):  
Solar System ◽  
Optimal Solution ◽  
Heating System ◽  
Hot Water ◽  
Design Parameters ◽  
Optimal Parameters ◽  
Water Heating ◽  
Solar Water Heating ◽  
Solar Water ◽  
Solar Water Heating System

The article deals with the economic evaluation of investment and optimization of the solar water heating system for family houses. From the point of view of solar systems, the optimal solution is based on the specific application of it. The design is dependent on the location of solar thermal collectors and ration between active aperture area and real daytime consumption. Common calculations according to actual standards often give overstated results, which also reflected in the value of the investments. The article presents the research of optimal parameters of the thermal solar system for preparing of domestic hot water. A combination of related standards and software TRNSYS are used to find optimal parameters. Thanks to created and verified simulation models, it is possible to design parameters so as to avoid under-dimensioning or over-dimensioning of the solar system. Energy price is another factor affects the payback period of investments. This is affected by the used energy sources and their combination. For example, buildings that use electricity to heat water or heating have different energy charges than a building that uses natural gas. So, the aim is to find technically and economically efficient solution.

Joint Application of Solar Water Heating System and Air-Conditioning System in a Dormitory Building

2010 ◽  
Vol 171-172 ◽  
pp. 215-218
Author(s):  
Hai Ying Wang ◽  
Song Tao Hu ◽  
Jia Ping Liu
Keyword(s):  
Air Conditioning ◽  
Heating System ◽  
Hot Water ◽  
Water Tank ◽  
Auxiliary Heating ◽  
Water Heating ◽  
Air Conditioning System ◽  
Solar Water Heating ◽  
Solar Water ◽  
Solar Water Heating System

Solar water heating system is used to supply hot water all-year-round for a new dormitory building. Flat solar energy collectors are mounted on the roof. The hot water tank and pumps are installed together with the air conditioning equipments in the plant room. Air cooled heat pump is used to provide cooling in summer, and high temperature water from boiler room (in old building) is used as heat source in winter. Usually auxiliary heating is necessary to improve the stability and reliability of solar water heating system. In this case, we take full use of the equipment of air conditioning system instead of electricity as auxiliary heating resources. In this paper, we introduced the design of the solar water heating system and the auxiliary heating method by air conditioning systems. The control strategies to fulfill all the functions and switch between different conditions are also introduced.

Optimization Analysis and Design of Solar Water Heating System by Lifecycle Cost Savings Method

2014 ◽  
Vol 644-650 ◽  
pp. 2428-2432
Author(s):  
Yu Bie ◽  
Si Ming Zheng ◽  
Ming Fu Hu ◽  
Wen Yuan Mao ◽  
Yong Fang
Keyword(s):  
Influence Factors ◽  
Cost Savings ◽  
Heating System ◽  
Water Heating ◽  
Solar Water Heating ◽  
Water Storage Tank ◽  
Analysis And Design ◽  
Solar Water ◽  
Solar Fraction ◽  
Solar Water Heating System

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.

Experimental Research on a Novel Solar Water Heating System by Using Loop Heat Pipe

2013 ◽  
Vol 724-725 ◽  
pp. 163-170
Author(s):  
Zhang Yuan Wang ◽  
Xiang Mei Zhang ◽  
Wan Sheng Yang ◽  
Zhi Wu Chen
Keyword(s):  
Heat Pipe ◽  
High Efficiency ◽  
Heating System ◽  
Hot Water ◽  
Loop Heat Pipe ◽  
Water Heating ◽  
Solar Water Heating ◽  
Solar Water ◽  
Evacuated Tubes ◽  
Solar Water Heating System

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 (Tmean-Tamb)/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.

scholarly journals Performance Studies and Energy-Saving Analysis of a Solar Water-Heating System

Processes ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1536
Author(s):  
Xilian Han ◽  
Chao Li ◽  
Hongqiang Ma
Keyword(s):  
Solar Energy ◽  
Energy Saving ◽  
Large Scale ◽  
Collection Efficiency ◽  
Heating System ◽  
Hot Water ◽  
Water Heating ◽  
Solar Water Heating ◽  
Solar Water ◽  
Solar Water Heating System

This paper proposed an experimental test: the solar water-heating system was been monitored for a whole year to analyze collector performance in an actual operation process. Heat-collecting efficiency, heating capacity, power consumption, and heat required were analyzed theoretically. Results showed that solar irradiance and ambient temperature were positively correlated with heat collection efficiency, and the daily average heat collection efficiency was up to 56.63%. In winter, the auxiliary heat source consumed the most power, almost all of which bears the heat of users. The heat collection in summer met the demand for hot water, and the guarantee rate of solar energy could reach 100%. The energy saving properties and CO2 emission reduction were analyzed. This system had a significant effect on the energy-saving effect and environmental protection. The analysis showed that the hot-water system can fully meet the design requirements under the condition of relatively sufficient solar energy, and can operate stably, which has a certain guiding significance for the design and application of large-scale solar hot-water systems.

Reliable and safe heat supply of residential buildings in transitional conditions with independent connection of the heating system

2021 ◽  
Vol 14 (1) ◽  
pp. 27-33
Author(s):  
O. D. Samarin
Keyword(s):  
Water Supply ◽  
Heat Exchangers ◽  
Heat Supply ◽  
Residential Buildings ◽  
Structural Characteristics ◽  
Heating System ◽  
Hot Water ◽  
Heat Output ◽  
Outdoor Air ◽  
Hot Water Supply

The arrangement for heat supply of residential buildings with indirect connection to external heating systems is considered, providing reliability of heat input and required comfort in case of cold snaps after the official end of the heating season or before its beginning by supplying water from the return main of the heating system downstream the hot water supply heat exchangers. The calculations have been made to determine the amount of the main components of heat balance of a residential building on an example of one of standard projects being currently used in the climatic conditions of Moscow, subject to the structural characteristics of the building and its occupancy level. It is established that the actual heat output of the heating system when using the system of chilled water downstream the hot water supply heat exchangers as a heat source enables to main-tain an indoor temperature required for safe living conditions with the average daily outdoor air temperature above +2°C, the heat gain from solar radiation being moderate. It is proven that, tak-ing into account the thermal stability of the enclosing structures, the daily flow rate fluctuations do not significantly affect the stability of the temperature conditions of residential buildings or the comfort of their indoor microclimate at high outdoor air temperatures. It is noted that, in terms of reliability of heat supply of the main group of residential buildings and ensuring the life safety, the proposed arrangement is not inferior to the standard two-stage arrangement of connection of DHW heat exchangers with restriction of the total consumption of delivery water and with the associated regulation of heat supply for DHW, heating and ventilation. It is shown that the use of this arrangement involves virtually no extra costs, provides hydraulic resistance of the heating system and ensures a system-wide effect in the form of higher electricity generation at thermal consumption when using cogeneration.

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