15.02.2018 WorldNews

ATMO China case studies signal market interest in NatRefs

The ATMOsphere Review Board has chosen the first round of technology case studies from international and domestic manufacturers promising to transition to natural refrigerants in the Chinese market.

In response to increased market interest in natural refrigerants, ATMOsphere China, the first Chinese edition of shecco’s global conference series ATMOsphere, will be held in the capital Beijing on 11-12 April 2018.

ATMOsphere China will delve into the state of the Chinese HVAC&R market, which is currently in a transitional stage after the global agreement reached to phase down HFCs under the Montreal Protocol. Conference presentations will showcase the value of leapfrogging from HCFCs to natural refrigerants in response to the global phasedown.

The ATMOsphere Review Panel has chosen the first round of technology case studies to be presented at the conference: from CAREL, DongQi, Emerson, Sanhua and Scantec.

The case studies cover natural refrigerants CO2, ammonia and propane used in a range of applications such as heat pumps, warehouses, supermarket retrofits, and a newly opened METRO Wholesale store, China’s first transcritical system.

The CO2 presentations are:

CAREL | China's first transcritical CO2 store Metro with CAREL control solutions, Metro, Beijing

The presentation will discuss CAREL’s role in the first transcritical CO2 project in China; in a METRO Wholesale store in Beijing.

Building on many years of experience with CO2 transcritical projects and European know-how, CAREL supplied the store’s total control system, including the rack system controller, cabinet control with step electronic expansion valves and local supervisory system. To provide reliability and efficiency, the company used the pR300T rack controller to control all the main parts of the rack system, from the suction compressors group to the gas cooler and the high- and medium-pressure valves.

Real data on energy consumption will be shown during the presentation to showcase, one more time, the sustainability of CO2 as a refrigerant working well in China’s climate.

DongQi | CO2 heat pump for space heating by Peijian Du

The presentation will detail the use of CO2 heat pumps as a substitute heat source for space heating.

A method of mixing water at the inlet of cold water in the gas cooler of a CO2 heat pump will be explained, with test results showing that the method doesn't only ensure the steadiness of CO2 air-source heat pump hot water systems in low-temperature conditions, but also increases the operation time and reduces the frequency of frosting.

The presentation will share real data results of a demonstration project using a CO2 heat pump as a heat source for space heating in Dalian.

Emerson | CO2 hybrid cascade system retrofitting at Anhui Hong Fu Supermarket flagship store by Younker You

This case study will discuss the Anhui Hong Fu Supermarket retrofit project with R744 and R134a at its flagship store. The end user expected to have about 13% energy savings and 10.8% TEWI reduction compared to traditional R22 refrigeration systems, at the same time aiming to eliminate the ozone depletion effect of R22.

Many world-leading technologies were used in this project, like Emerson digital modulation, CoreSense™ Diagnostics, specialised CO2 semi-hermetic and scroll compressors, flow control components and control solutions.

The presentation will share the statistical analysis data of the store, which was opened in September 2017, showing that the new R134a/R744 cascade refrigeration system has an extremely steady running performance, reducing the compressor's cycle downtime to 20% of the traditional system's, which could have a significant improvement on energy savings and compressors service life.

r744.com

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