Design of solar heated water system based on TLD system in Baotou

Transcription

1 Applied Mechanic and Material Online: ISSN: , Vol , pp doi: / Tran Tech Publication, Switzerland Deign of olar heated water ytem baed on TLD ytem in Baotou Wei Xu 1, a, Xiao Zhang 1, b, Zhichang Tian 1, c 1 Architecture and Civil Engineering School, Inner Mongolia Univerity of Science and Technology, Baotou, Inner Mongolia, , China a btxuwei2006@126.com, b zhangxiaoky@163.com, c tian-zhch@qq.com Keyword: Solar energy, TLD (tuned liquid damper), Area of collector. Abtract. Solar energy i a new manner of clean energy with potential for development in the 21t century. In light of the deign of TLD (Tuned Liquid Damper), the technology of olar heated water ytem i innovatively put forward to upply hot water for reident. Particular attention i given to analyze the limitation of TLD ytem. Taking a high-rie building of Baotou a an example, the amount of olar radiation i calculated and data collected are preented in Baotou. There i a focu on counting the load of olar heated water through the life water demand, which determine the area of collector. Finally, the feaibility of olar water heating ytem i howed in the reult by the utilization of TLD ytem, which provide a certain reference action for future reearch work of TLD ytem. Introduction A a renewable energy ource with the characteritic of clean and non-polluting, olar energy i a neceary way of future development and utilization of renewable energy ource. The exploitation and utilization of olar energy ha ignificant importance to ave conventional energy, protect natural environment and low climate change [1]. With the mature of olar heated water technology currently, it bring a lot of convenience to life, and how to apply it to other area become a trend of contemporary reearch. The application of TLD (tuned liquid damper) in high-rie building can reduce the repone of the earthquake vibratory action, but it i difficult to be popularized due to the higher cot. In thi paper, olar technology i applied to high-rie building with TLD ytem to olve the reident need of the daily hot water and reduce the comprehenive cot of TLD ytem. Characteritic and improvement program of TLD ytem TLD adopt the inertia and vicoity of the liquid in the container fixed on a tructure to adjut the period of liquid ocillation in the TLD to be near the period of ocillation of the tructure and get the maximum dynamic water preure which i the control force of tructure, o a to achieve the purpoe of reducing tructural vibration [2]. Although TLD ytem ha many advantage, there are till certain limitation in actual application. Large invetment with high cot A a rigid container TLD need a large number of teel. Exceive ue of teel caue the high cot, which will be not conducive to promote TLD in practical engineering. For example, after deign and calculation of the Project Cae in thi paper, TLD need 71.73t of teel with 4mm thick and the market price i 4000 yuan/t, o the overall price of teel i yuan (71.73 * 4000), and the teel plate pend about yuan totally. Single application In addition to vibration reducing performance, TLD can be double a torage device and the function of TLD i ingle. After altering with olar hot water ytem, TLD can upple 24-hour hot water for reident in TLD apartment, it ave reource, and meanwhile the alteration reduce the comprehenive cot and improve the comfort of life. All right reerved. No part of content of thi paper may be reproduced or tranmitted in any form or by any mean without the written permiion of Tran Tech Publication, (ID: , Pennylvania State Univerity, Univerity Park, USA-04/03/16,17:44:45)

2 2324 Advance in Civil and Structural Engineering III Water Cycle Technique In mot intance the liquid in the TLD container i dometic water and after frowzily baking on the top of the tructure for a long time, the water in the container will go bad and caue germ and bacteria. Changing water and cleaning by manual will increae the cot in ubequent ue. The application of olar heated water ytem can olve imilar problem becaue of recirculation flow. Deign of olar heated water ytem by TLD ytem Project background The project example i located in the Baotou, with the latitude of ' and longitude of ', where i rich of olar energy reource with the annual unhine duration of hour and horizontal olar irradiation of MJ/( m2. a) [3]. The project ha total of 22 floor, the 1t floor and 2nd floor are ued for the retaurant, the 3rd floor for property management and 4th to 22nd floor for apartment. The total number of houehold i 361 with 722 people. DC double tank ytem i adopted. The olar energy i in main when the weather i fine, and the auxiliary power upply (APS) i ued when it i cloudy or rainy with the capacity of APS no le than 40kw. Vent valve Collector Solar heat torage tank Vent valve Connect tap water Hot water upply tank Auxiliary power Circulating water pump Fig.1 3D map of building Fig.2 Dc double tank ytem Meteorological data in Baotou Table 1 Solar irradiation time in Baotou monthly in the lat 5 year Unit:h Year Month Average value Aggregate

3 Applied Mechanic and Material Vol Table 2 Temperature of Baotou monthly in the lat 5 year Year Month Unit: Average value Average value Month Table 3 Meteorological Parameter in Baotou T a H t H d H b H H o S m K t The level face olar irradiation The tilt face olar irradiation From the above table, we can be drawn ome data that the average annually temperature i 8.6, average annually unhine time i 7.92h, the average irradiance on the pour urface i MJ / m, the total amount of radiation on the pour face MJ / m. The ituation of the water uage One houehold need 100 L hot water, about 36t (the conolidated value according to Code for deign of building water upply and drainage and combining with the actual ituation that the city of Baotou i the lack of water). The temperature of the inlet of water pipe i 4 in winter (Code for deign of building water upply and drainage Table 5.1.4) and 8 in ummer (average outdoor temperature). The temperature of the outlet of water pipe i 50 (Code for deign of building water upply and drainage Table 5.1.4). The tilt angle of collector for the intallation: 45

4 2326 Advance in Civil and Structural Engineering III The ditance of collector in row coγ D = H. (1) tanα When the collector face the outh, γ = 0 equation (1) become D = H ctgα (2) In that, in α = inϕ inδ + coϕ coω n δ = 23.45in[360 ] (3) 365 α=40 63, D=0.5m The area of olar collector According to Solar heated water ytem-deign intallation, engineering acceptance ( GB /T ) and the area of olar collector can be calculated a follow: A C Q = W C t W ( tend ti ) ( 1 ) J η η cd L f Solar fraction f= olar collector ytem got the heat in quantity hourly / olar collector ytem got the heat in quantity hourly=( )/( )=0.75. So, Ac= m < 1200 m2 (the area of the top floor), it i feaible. Thi paper will not dicu that if the weight will affect the roof tructure when the collector area i more than half of the roof area, and which will be mentioned in tructure deign. The olar vacuum tube The ytem require 98 group of vacuum collector, about 5488 ingle vacuum tube (φ mm). The ingle vacuum tube will produce 8kg water one day, one collector will produce 448kg water one day, which fully atifie the demand of hot water of reident in high-rie building. Comment At preent TLD i deigned baed on damping. Technical retrofit for the olar heated water ytem in high-rie building ha been carried out by adopting TLD ytem on the premie of meeting the requirement for eimic deign. It atifie the demand of hot water of reident in high-rie building with certain innovation, which can provide technical upport for future reearch of TLD ytem. Reference [1] Zinian He: Solar Thermal Utilization (China Science and Technology Univerity Pre, Hefei20 09). [2] Hongnian Li : Vibration and Control (China Building Indutry Pre, Beijing 2005). [3] Technical code for olar water heating ytem of civil building. Chinee National Standard GB ( China Building Indutry Pre, Beijing 2005). (4)

5 Advance in Civil and Structural Engineering III / Deign of Solar Heated Water Sytem Baed on TLD Sytem in Baotou /