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Related Concept Videos

Heating and Cooling Curves02:44

Heating and Cooling Curves

When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by 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...
Mechanism of heat transfer01:19

Mechanism of heat transfer

Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
Heat Flow and Specific Heat01:12

Heat Flow and Specific Heat

Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. Since heat is a form of energy, its SI unit is the joule (J). Another common unit of energy often used for heat is the calorie (cal), which is defined as the energy needed to change the temperature of 1 g of water by 1 °C, specifically between 14.5 °C and 15.5 °C, since the energy needed shows a slight temperature dependence. Another commonly used unit is the kilocalorie...
Refrigerators and Heat Pumps01:07

Refrigerators and Heat Pumps

Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
A household refrigerator removes heat from the...
Conduction, Convection and Radiation: Problem Solving01:20

Conduction, Convection and Radiation: Problem Solving

There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
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...
Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
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.

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Solar heating and cooling.

Science (New York, N.Y.)·1976
See all related articles

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Updated: May 11, 2026

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
07:18

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

Solar heating and cooling.

J A Duffie

    ISA Transactions
    |January 1, 1976
    PubMed
    Summary

    Solar energy offers a versatile renewable resource for various applications. This review covers solar collectors, water heating, building heating, and cooling systems, highlighting their current status and potential.

    Area of Science:

    • Renewable Energy Sources
    • Sustainable Technologies

    Background:

    • Solar energy is a key renewable resource with the potential to meet diverse energy demands.
    • Understanding its applications is crucial for transitioning to sustainable energy systems.

    Purpose of the Study:

    • To review the nature of solar energy as a resource.
    • To explore various applications of solar energy technologies.
    • To assess the current status of implemented solar energy systems.

    Main Methods:

    • Literature review of solar energy principles and applications.
    • Compilation of information on solar collectors and their performance.
    • Analysis of data related to solar water heating, building heating, and cooling systems.

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    Last Updated: May 11, 2026

    Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
    07:18

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    Published on: October 18, 2017

    Structural Design and Manufacturing of a Cruiser Class Solar Vehicle
    14:57

    Structural Design and Manufacturing of a Cruiser Class Solar Vehicle

    Published on: January 30, 2019

    Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
    09:09

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    Main Results:

    • Solar energy can be effectively converted into various useful energy forms.
    • Specific applications like solar water heating and building climate control are well-established.
    • Information on solar collectors and advanced applications is presented.

    Conclusions:

    • Solar energy is a viable and important renewable energy source.
    • The reviewed systems demonstrate the practical utility of solar energy in diverse sectors.
    • Further development and application of solar technologies are encouraged for energy sustainability.