PDF Publication Title:
Text from PDF Page: 016
HPT TCP ANNEXES Fig. 3: Spectrum of A-weighted sound power levels for Standard rating conditions EN 14511 (#1) from 6 laboratories [Source: CETIAT, France] » Workshop on acoustics of heat pumps at the ICR2019 in Montreal held, presentation published on the IEA HPT Annex 51 website; » Concluding international workshop and compilation of proceedings planned at Mostra Convegno 2020; » Worldwide dissemination to heat pump manufacturers; » Generation and distribution of Acoustic Guidelines for the different levels (Component, Unit % Application Level). Progress Psychoacoustic tests, which will give input to the test de- sign used in the Annex 51 have been carried out by the Acoustic Research Institute of the Austrian Academy of Sciences. A joint acoustic data set will be analyzed using psychoacoustic hearing tests in three different countries. The timeline is defined, data samples will be generated, and psychoacoustic panel tests will be performed by Öst- erreichische Akademie der Wissenschaften (ÖAW), Poli- tecnico di Milano (POLIMI) and RISE. The documents on Introductions to Acoustic, Measurement Techniques and Regulations, which have been prepared under the task led by Politecnico di Milano, Italy, saw their first release to public and are available on the IEA HPT Annex 51 website for download. Comments and ad- ditions have been gathered and the updated documents will be added to the website mid of 2020. Three heat pumps have been “on tour” through Europe at the participating institutes. These are an Air-to-water Heat Pump (see Figure 2), an Exhaust-air Heat Pump Wa- ter Heater (HPWH) and an Air-to-air Heat Pump. Their final tests were performed during 2019. Results from the measurement campaign of the Air-to- water Heat Pump show, in most of the cases, similar results in the participating laboratories, see Figure 3. The differences that can occur are acceptable, given the variety of test environments and acoustic test methods. When some larger difference appeared, it was often due to a difficulty of adjusting operating conditions rather than an acoustical measurement problem. One laborato- ry implemented measurements with a dodecagonal po- lar frame around the outdoor unit, with 55 microphones. The data from 12 microphones (see Figure 2 bottom), allows the plot of the relative directivity diagram, pre- sented in A-weighted overall level in Figure 4 left. The di- rectivity diagram in Figure 4 right (which is rotated by 15 degrees compared to Fig 4 left) shows the acoustic radi- ation directivity of the unit for each octave band in dB(A). A dissemination workshop “Acoustics of Heat Pumps” has been be organized by the Annex 51 team in the fra- mework of the 25th IIR International Congress of Refri- geration in Montreal, Canada, August 2019. The presen- tations are available on the IEA HPT Annex 51 website for download. There were six presentations of Annex 51 partners, and a panel discussion. 16 HPT MAGAZINE VOL.38 NO 1/2020PDF Image | Integration of Heat Pumps into the Future Energy
PDF Search Title:
Integration of Heat Pumps into the Future EnergyOriginal File Name Searched:
HPT-Magazine_no1_2020.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)