Related Experiment Video
Updated: Jul 5, 2026

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
Published on: October 18, 2017
Dynamic evaporative and radiative cooling for efficient year-round energy savings
Zhengui Zhou1, Ablimit Aili2, Shancheng Wang1
1Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, China.
Abstract:
Electricity-free radiative cooling (RC) techniques are gaining ever-increasing attention to decrease energy consumption and carbon dioxide (CO2) emissions. However, the cooling power of RC in summer is severely limited by atmospheric window constraints and its negative effect in winter offsets annual energy savings in four-season regions. This study introduces a dynamic evaporative and radiative cooling (DERC) device to maximize the cooling power in hot summer and achieve year-round dynamic thermal management. Adaptive to changes in environmental temperature, the DERC device demonstrates dynamic regulation of water evaporation, along with notable modulation of solar and thermal radiation (ΔAsol = 87%; ΔεBroadband = 63%). Theoretical and real-time experiments demonstrate that the DERC device is more energy-efficient than cutting-edge dynamic radiative cooling (DRC) techniques. The energy-saving simulations indicate that the DERC device yields over 40% primary energy savings and CO2 emission reduction compared to the DRC device. This DERC device represents a conceptual advancement, paving the way for global energy savings and emission reductions.
Related Concept Videos
Heating and Cooling Curves
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
Refrigerators and Heat Pumps
A household refrigerator removes heat from the...
Mechanism of heat transfer
Conduction, Convection and Radiation: Problem Solving
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
Energy Conservation and Bernoulli's Equation
All the terms in the equation have the dimension of energy per unit volume. The kinetic energy per unit volume is called the kinetic energy density, and the potential energy per unit volume is...
Mechanisms of Heat Transfer
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant heat.
