Constructing the water circulation system to maintain and improve the urban landscape water

2011 ◽  
Author(s):  
Kang MengXin ◽  
Tian YiMei
Keyword(s):  
Urban Landscape ◽  
Water Circulation ◽  
Circulation System ◽  
Landscape Water ◽  
Water Circulation System ◽  
Urban Landscape Water

scholarly journals Mapping of Domestic Hot Water Circulation Losses in Buildings – Preliminary Results from 134 Measurements

2020 ◽  
Vol 172 ◽  
pp. 12009
Author(s):  
Stephen Burke ◽  
Jonatan von Seth ◽  
Tomas Ekström ◽  
Christoffer Maljanovski ◽  
Magnus Wiktorsson
Keyword(s):  
Total Energy ◽  
Energy Flow ◽  
Energy Use ◽  
Average Energy ◽  
Water Circulation ◽  
Hot Water ◽  
Circulation System ◽  
Preliminary Results ◽  
Water Circulation System ◽  
Heated Floor

The hot water circulation system in a building is a system which helps prevent Legionella problems whilst ensuring that tenants have access to hot water quickly. Poorly designed or implemented systems not only increase the risk to people’s health and thermal comfort, but even result in an increase in the energy needed for this system to function properly. Results from previous studies showed that the total hot water circulation system loss can be as high as 25 kWh/m2 heated floor area per year. The purpose of this project is to measure the total energy use per year of the hot water circulation system in about 200 multifamily dwellings of different ages to verify that a system loss of 4 kWh/m2, year is a realistic assumption for both newer and older/retrofitted buildings. The preliminary results from the first 134 measurements showed that the assumption of 4 kWh/m2, year is rarely fulfilled. An average energy use of more than three times this is more common, even in newer buildings. Whilst some of the total energy lost is used to heat the buildings, it is not desirable because it is an uncontrolled energy flow.

scholarly journals The aquarium and sea-water circulation system at the Plymouth Laboratory

1952 ◽  
Vol 31 (1) ◽  
pp. 193-211 ◽  
Author(s):  
Douglas P. Wilson
Keyword(s):  
Natural History ◽  
School Children ◽  
Life Histories ◽  
Sea Water ◽  
Water Circulation ◽  
Circulation System ◽  
Marine Animals ◽  
Public Display ◽  
Water Circulation System ◽  
Small Charge

The aquarium or tank room, to which visitors are admitted on payment of a small charge, was not designed primarily for public display, but was intended principally to facilitate scientific observations on the habits and life histories of marine animals. This original purpose it has never lost, but of recent years it has increasingly catered also for the steadily growing number of people interested in natural history, and for numerous classes of school-children brought by their teachers. Since the aquarium was re-opened in November 1946 attendances have shown a big increase over comparable pre-war figures.

Organic Contaminant Types of Urban Landscape Water and Countermeasures: A Case Study of the Xuchang Moat

2013 ◽  
Vol 361-363 ◽  
pp. 686-690
Author(s):  
Zhong Xuan Li ◽  
Wen Lü
Keyword(s):  
Complex Traits ◽  
Urban Landscape ◽  
Pollution Index ◽  
Cooking Oil ◽  
North East ◽  
Landscape Water ◽  
Main Components ◽  
Fluorescence Spectrometer ◽  
Urban Landscape Water

By monitoring the water quality (Dec., 2009-2011) of the three sections of the moat in Xuchang, the data show that three-year average turbidity of the water at North, East, South sections is 18.6,16.7 and 12.4 respectively, and with average COD at 43 mg / L, 37.5 mg / L and 29.5 mg / L in accordance, as well as with BOD5 content at 16.1mg / L, 15.0mg / L and 8.7 mg / L. The integrated pollution index of the three mentioned sections was 2.54,1.94 and 1.06 in December 2011, increasing by 29.6%, 22% and 34.2% in comparison with the same period in 2009. The fluorescence spectrometer tests display that the main components of organic pollutants at the northern and eastern sections are organic detergent, cooking oil and a variety of plant and animal protein in complex traits.

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