Evaporation Rate and Evaporative Cooling Effect of Pavement Materials

Traditional impermeable pavements such as asphalt have dark surfaces and high thermal inertia. During hot weather, they tend to absorb and store solar radiation, which promotes the development of urban heat islands (UHI). Furthermore, permeable pavements are effective in mitigating the urban heat island effect via evaporative cooling. There are many studies in the literature on the hydraulic and mechanical characteristics of permeable pavements, but a few studies focus on the impact of evaporative cooling of these pavements. In this study, 3 types of permeable pavements based on pozzolan, recycled rubber and polyurethane resin were studied during 3 hot days. The objective was to quantify the cooling effect in these innovative permeable pavements compared to a traditional impermeable asphalt pavement. The results of this experiment show that the cooling effect in the new types of draining pavements can last up to two days in the weather conditions of this experiment compared to the traditional asphalt pavement. The evaporation rate and surface temperature of permeable pavements vary in opposite directions. In addition, evaporation in pervious pavements is controlled by the availability of water near the surface. This study is a preliminary step in the design of pavements that contribute to the valorization of rubber waste, to the stormwater management and to the reduction of the effects of urban heat islands during heat waves.

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Calculation of Water Evaporative Cooling Systems in Animal Husbandry

Machinery and Equipment for Rural Area ◽

10.33267/2072-9642-2020-11-35-38 ◽

2020 ◽

pp. 35-38

Author(s):

N.N. Novikov ◽

Keyword(s):

Air Conditioning ◽

Evaporation Rate ◽

Evaporative Cooling ◽

Animal Husbandry ◽

Water Evaporation ◽

Cooling Systems ◽

Temperature And Humidity ◽

Hot Weather ◽

Livestock Building ◽

Air Exchange

A method for calculating the parameters of the microclimate in a livestock building using water-evaporative air conditioning is described. It makes it possible to choose a rational temperature and humidity conditions for a room in hot weather, calculate the required air exchange, water evaporation rate and select the appropriate equipment.

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Measurement of the evaporative cooling effect: oscillating misting fan

Building Research & Information ◽

10.1080/09613218.2017.1278651 ◽

2017 ◽

Vol 45 (7) ◽

pp. 783-799 ◽

Cited By ~ 5

Author(s):

Craig Farnham ◽

Lili Zhang ◽

Jihui Yuan ◽

Kazuo Emura ◽

Ashraful M. Alam ◽

...

Keyword(s):

Evaporative Cooling ◽

Cooling Effect

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Study of a solar-driven membrane distillation system: Evaporative cooling effect on performance enhancement

Renewable Energy ◽

10.1016/j.renene.2017.01.030 ◽

2017 ◽

Vol 106 ◽

pp. 192-200 ◽

Cited By ~ 28

Author(s):

A.E. Kabeel ◽

Mohamed Abdelgaied ◽

Emad M.S. El-Said

Keyword(s):

Performance Enhancement ◽

Evaporative Cooling ◽

Membrane Distillation ◽

Cooling Effect ◽

Distillation System

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Thermal Properties of Water-Absorbing and Surface Modified Porous Pavements

Materials Science Forum ◽

10.4028/www.scientific.net/msf.544-545.913 ◽

2007 ◽

Vol 544-545 ◽

pp. 913-916 ◽

Cited By ~ 1

Author(s):

Ree Ho Kim ◽

Sang Ho Lee ◽

Jung Hun Lee ◽

Chae Sung Gee

Keyword(s):

Surface Temperature ◽

Field Tests ◽

Cooling Effect ◽

Natural Soil ◽

Local Climate ◽

Pavement Materials ◽

Analysis Technique ◽

Porous Pavement ◽

The Difference ◽

Surface Modified

The creation of large impervious surface in urban and urbanizing areas have led to significant impacts on local climate, which is commonly known as urban heat island (UHI). In this study, porous pavements made of recycled sludge were examined as a way to control UHI by lowering the surface temperature. A novel image analysis technique was applied to quantify cooling effect of porous pavement materials without and with water. Although the porous pavement itself has smaller heat capacity than the natural soil, supplying water to the pavement decreased its surface temperature. At its highest point, the difference in surface temperatures without and with water was more than 10 oC. The water was supplied either from the top of the pavement or from the bottom of the pavement using the capillary effects. In both cases, pavement temperature was effectively lowered. The cooling effect of pavement by surface coating using epoxy-based polymers was negligible because surface pores were blocked. Field tests also confirmed the cooling potential of porous pavements.

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