PDF Publication Title:
Text from PDF Page: 274
The limitation of the refrigerant charge amount in existing and new systems is governed by two factors, the refrigerant acute toxicity exposure limit (ATEL) for the non-flammable gases and refrigerant lower flammability limit (LFL) or ATEL (whichever is the lower) for flammable refrigerants. This will be discussed in section 13.5.3 below. 13.5.2 Designing for MEPS: size and cost of units Designing to meet the Minimum Energy Performance Standards (MEPS) in HAT countries is another important factor as most of these countries have new and upgraded MEPS. This requires special design of bigger, more efficient units with an obvious impact on the unit size and cost to meet these new MEPS. 13.5.3 Meeting safety considerations With the transition from HCFCs and high GWP HFCs to medium and low GWP alternatives, refrigerant-related safety issues – specifically, flammability, toxicity and higher pressures – have come more into focus. RACHP systems and equipment should present a low risk to end users, operators and technicians and this is normally achieved through satisfying the design and construction requirements of the applicable national legislation. Such legislation also invokes to some extent risk analysis and risk assessment, which are used to demonstrate that all factors, variables, usage circumstances, etc., have been considered with respect to the various foreseeable hazards. Equipment and installation safety standards, where they exist, are either secondary means of complying with legislation or are voluntary best practice (at time of issuance) guides which in either case assist with minimising risk. The recent Decision XXVIII/4 Task Force report “Safety Standards for Flammable Low global warming potential (GWP) Refrigerants” provides a detailed overview of available safety standards including scope and content as well as relationship with legislation. In addition to the Decision XXVIII/4 Task Force report, Chapter 2 of this report also identifies the relevant international and regional safety standards, which can be applicable to all countries, including HAT countries. 13.5.3.1 Safety standards Table 13-1 lists the main categories of requirements from the safety standards (as identified in Chapter 2), and identifies how each of those categories may be impacted on differently if the RACHP systems were intended for use in a HAT country relative to Medium Ambient Temperature (MAT) and Low Ambient Temperature (LAT). 2018 TOC Refrigeration, A/C and Heat Pumps Assessment Report 261PDF Image | Heat Pumps Technical Options
PDF Search Title:
Heat Pumps Technical OptionsOriginal File Name Searched:
RTOC-assessment-report-2018_0.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)