Group Headquarter
Polytek Engineering Company Ltd.
15/F., Excelsior Building, 68 Sha Tsui Road
Tsuen Wan, Hong Kong
TEL: (852) 2807 3322 FAX: (852) 2806 0388
EMAIL: polytek@polytek.com.hk
Hongkong Service Center
TEL: (852) 2807 3322 FAX: (852) 2806 0388
EMAIL: polytek@polytek.com.hk
Macau Office
Polytek Equipment Supply Ltd.
Av. Praia Grande No.619, Edf Si Toi Commercial Centre FL 7,
Rm H, Macau
TEL: (853) 2876 5614 TEL: (853) 6674 8730
EMAIL: polytek@macau.ctm.net
China Headquarter
Polytek International Trading (Shanghai) Co., Ltd.
Room 603,No.8 Building, Ruijin Business Centre,
No.96 Zhao Jia Bang Road, Shanghai, 200020
TEL: (86 21) 6361 0661 FAX: (86 21) 6351 8320
EMAIL: polyteksh@polytekgroup.com
Shanghai Service Center
TEL: (86 21) 3203 5219 FAX: (86 21) 3203 5602
EMAIL: servicesh@polytekgroup.com
Beijing Office
Polytek International Trading (Shanghai) Co., Ltd.
Room 2803, No.3 Building, Soubao Business Centre,
No.16 Nan San Huan Xi Road, Beijing, 100052
TEL: (86 10) 6515 0700 FAX: (86 10) 6515 8908
EMAIL: polytekbj@polytekgroup.com
Beijing Service Center
TEL: (86 10) 6515 0700 FAX: (86 10) 6515 8908
EMAIL: servicebj@polytekgroup.com
Guangzhou Office
Polytek International Trading (Shanghai) Co., Ltd.
Room 2517,25/F Guangbaixinyi Building,No.18 Xi Hu Road,
Yue Xiu District, Guangzhou, 510030
TEL: (86 20) 8327 8941 FAX: (86 20) 8327 8940
EMAIL: polytekgz@polytekgroup.com
Guangzhou Service Center
TEL: (86 20) 8327 8941 FAX: (86 20) 8327 8940
EMAIL: servicegz@polytekgroup.com
The China Southwest Air Catering company in Chengdu is one of the four major caterers in Mainland China, as well as the largest in-flight caterer in western China. Daily production is 50,000 meals. This required 71 substantial walk-in cold rooms across the job site.
This 3-storey building had 22m of headroom, so the only place to position the condensing unit was on the rooftop. This posed a problem with circulating the refrigerant oil back to the unit. On top of this, part of the chilling capacity coming from the system had to be used for cooling the production working temperature that was specified to be regulated at 14 degrees Celsius. The regular air conditioning could only bring the temperature down to 18 degrees Celsius. This was the first time we had been asked to share the cold room system chilling power with the air conditioning.
A dual suction riser system was adopted to overcome the oil return circulating problem. We used our expertise and knowledge to come up with an accurate total BTU for the complete system, which has been up and running smoothly since the opening.
