energyNP.com  
Tel
98510-91900 
Email
energyNP@hotmail.com 
Menu

 
 
News  
Back to energy news list >>>
 

 
 
 Air Conditioner
 Battery
 Booster Pump
 Charger
 Cold Storage Room
 Electric Power Tools
 Electric Water Heater
 Garbage Disposal
 Station
 Generator
 Heat Pump
 Inverter
 Power Supply
 Rectifiers
 Self Priming Pump
 Solar Energy
 Solar Water Heater
 Transformer
 UPS
 Voltage Stabilizer
 Wind Energy
 
  Team Develops New Way to Extract Thermal Energy From Waste Heat Sources and Reuse It via Pressure Control

A Chinese research team has developed a new concept for extracting thermal energy from low-temperature waste heat sources and reusing it on demand simply by controlling the pressure.

Heat production accounts for more than 50% of the world's final energy consumption and analysis of waste heat potential shows that 72% of the world's primary energy consumption is lost after conversion, mainly in the form of heat. It is also responsible for more than 30% of global greenhouse gas emissions.

Against this background, researchers led by Prof. Li Bing from the Institute of Metal Research of the Chinese Academy of Sciences have proposed and realized a new concept—barocaloric thermal batteries based on the unique inverse barocaloric effect.

Barocaloric thermal batteries: Concept and realization. Credit: Institute of Metal Research

The study was published in Science Advances.

An inverse barocaloric effect is characterized by a pressure-induced endothermic response, in sharp contrast to a normal barocaloric effect where pressurization leads to an exothermic response. "A barocaloric thermal battery cycle consists of three steps, including thermal charging upon pressurization, storage with pressure, and thermal discharging upon depressurization," said Prof. Li, corresponding author of the study.

The barocaloric thermal battery was materialized in ammonium thiocyanate (NH4SCN). Discharge was manifested as the heat of 43 J g-1 or a temperature rise of about 15 K. The heat released was 11 times greater than the mechanical energy input.

To understand the physical origin of the unique inverse barocaloric effect, the working material NH4SCN has been well characterized using synchrotron X-ray and neutron scattering techniques. It undergoes a crystal structural phase transition from a monoclinic to an orthorhombic phase at 363 K, accompanied by a volumetric negative thermal expansion of ~5% and entropy changes of about 128 J kg-1 K-1.

This transition is easily driven by pressure as low as 40 MPa, and it is the first inverse barocaloric system with entropy changes greater than 100 J kg-1K-1. Pressure-dependent neutron scattering and molecular dynamics simulations showed that the transverse vibrations of SCNˉ anions are enhanced by pressure and the hydrogen bonds that form the long-range order are then weakened.

As a result, the system becomes disordered in response to external pressure and thus the material absorbs heat from the environment.

As an emerging solution for manipulating heat, barocaloric thermal batteries are expected to play an active role in a variety of applications such as low-temperature industrial waste heat harvesting and reuse, solid-state refrigeration heat transfer systems, smart grids, and residential heat management.

[19 February, 2023 / world-energy.org ]   
 
 
Voltage Stabilizer Nepal Kathmandu
 
UPS Nepal Kathmandu
 
Lithium iron battery LiFePO4 Battery Nepal Kathmandu
 
Inverter Hybrid On-grid Off-Grid Energy Storage Solar Inverter Nepal Kathmandu
 
Solar Water Heater Nepal Kathmandu
 
GREE Air Conditioner Residential Nepal Kathmandu
 
Solar Water Heater Nepal Kathmandu
 
Gree Air Purifier Kills Novel Coronavirus Nepal Kathmandu
 
Battery Charger Nepal Kathmandu
 
Complete Power Solution
 
 
 
 
Solar Water Heater Nepal Kathmandu Solar Energy Nepal Kathmandu Wind Power Nepal Kathmandu Power Generator Nepal Kathmandu Voltage Stabilizer Nepal Kathmandu Transformer Nepal Kathmandu AirConditioner Nepal Kathmandu Battery Nepal Kathmandu UPS System Nepal Kathmandu Rectifier Nepal Kathmandu
 
 
Link: The Official Portal of Goverment of Nepal Nepal Electricity Authority Nepal Alternative Energy Promotion Centre Nepal Telecom Nepal Department of Agriculture Nepal Department of Industry wow Nepal! Nepal Global Buying SIMONES Industries|Nepal Power Solution
  Nepal Goverment Nepal Electricity Authority Nepal Alternative Energy Promotion Centre Nepal Telecom Nepal Department of Agriculture Nepal Department of Industry wow-Nepal | Nepal Global Buying SIMONES Industries |Nepal Power Solution
 
Fair: Investment Summit Nepal Himalayan Hydro Expo Nepal Kathmandu China International Import Expo China Import and Export Fair China-South Asia Exposition Guangzhou Int’l Refrigeration, Air-Condition, Ventilation, Air-Improving Equipment Exhibition Guangzhou International Solar Photovoltaic Exhibition Asia Battery Sourcing Fair
  Investment Summit Nepal Himalayan Hydro Expo Nepal China International Import Expo China Import and Export Fair China-South Asia Exposition Int'l Refrigeration, Air-Condition Fair Int'l Solar Photovoltaic Exhibition Asia Battery Sourcing Fair
 
Copyright @ 2014 All right reserved. Simones Industries