PDF Publication Title:
Text from PDF Page: 023
1 Introduction This chapter presents the background for the doctoral work, focusing on the main reasons for carrying out a theoretical and experimental study of residential brine-to-water and water-to-water CO2 heat pump systems for combined space heating and hot water heating. The last part of the chapter presents the objectives and scope of the doctoral work as well as the structure of the thesis. 1.1 Background for the Doctoral Work 1.1.1 Working Fluids and the Environment During the last fifteen to twenty years, the most pressing research issue within the field of refrigeration, air-conditioning and heat pump systems has been the search for environmentally acceptable working fluids which can replace the ozone-depleting ChloroFluoroCarbons (CFCs) and Hydro- ChloroFluoroCarbons (HCFCs). Most of the substances evaluated and tested have been new synthetic compounds, namely HydroFluoroCarbons (HFCs). Although these compounds are non-toxic, non-flammable, non- carcinogenic and have zero ozone depletion potential (ODP), they have environmental drawbacks: ♦ The global warming potential (GWP factor) of the most commonly used HFCs is about 1300 to 3500 times higher than that of CO2 (UNEP, 1998). Due to this fact, the HFCs have been implemented in the Kyoto Protocol1 to the United Nations Framework Convention on Climate Change, together with CO2, methane and NOx. ♦ During production of HFCs, toxic and harmful wastes are released, including fluorinated materials, vinyl chloride, ethylene dichloride (carcinogenic), other chlorinated organics, HFCs and HCFCs (Banks and Sharrat, 1996). 1 The Kyoto Protocol - http://www.untreaty.un.org/English/notpubl/kyoto-en.htm 1 – Introduction 1PDF Image | Residential CO2 Heat Pump System for Combined
PDF Search Title:
Residential CO2 Heat Pump System for CombinedOriginal File Name Searched:
20559406.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)