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Email: info@finoric.com

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Phase Change Material PCM Electronic Chamber Cooling Temperature Control

If you are versed with Phase Change Material, then you may directly read the matter below the horizontal line. If you need to understand more then you may go in the following order:

Introduction to PCM Air Condition
Phase Change Material Non Hazardous Salts
Peak Load Shifting in AC Air Condition

After reading this much you may shift below the horizontal line. You may also check the following pages:

Energy Saving tips for Lighting, Insulation and Windows, Renewable Energy, Air Change Rate etc
Phase Change Material for Electronic Comfort
PCM for Green House.


Electronic Comfort is the temperature at which the electronic equipment will perform efficiently. We have come across uses that will want temperature below 95F or below 115C or 140C and so on. In one application the party specified it as 70C (158F) and 78C (172F). Phase Change Material melting at various temperature is used for controlling the temperature.

Temperature maintained below 95F (35C) in Basic Telecom Shelter BTS.

A BTS is at the bottom of a telecom tower. It has its electronic components and a battery. It generates its own heat and it is required o be maintained below 95F, irrespective of the ambient temperature. This is ordinarily done by air conditioning. We were asked to design a system with PCM based unit that will last for about 6 hours even after the Air condition is switched off. The live site trial of the system is shown below.

Live-Site Trial in a Telecom Shelter after Retro-fitting it with 210 Kg of PCM Latest29T (10 KWH back-up

210 Kg of Latest29T PCM (10KWH) filled profiles were installed in an existing BTS Basic Telecom Shelters of 2m Length by 2.5m width by 2.7m Height. Five thermometers were installed to measure temperature at various points. The Air-condition was switched off when the temperature was 17.3oC. Ambient temperature was also measured. The battery voltage was observed as per the instruction of the site-officer. The permissible maximum temperature that can be reached was targeted to 36oC. This temperature was not reached in 6 Hours of the run. In a blank reading with-out Latest29T PCM the target maximum temperature crossed in less than 1 hour.

Important Record.
Better viewed on big Screen.
Minutes after Power Shutdown - 0min - 030m - 060m - 120m - 180m - 210m - 270m - 300m - 330m - 360m
Average TempC (of 5 Sensors)- 17.3 - 22.4 - 25.2 - 29.1 - 31.3 - 32.1 - 32.8 - 33.1 - 33.2 - 33.3
Other Relevant Record
Outside TempC --------------- 26.5 - 28.0 - 29.5 - 31.0 - 33.0 - 33.0 - 30.0 - 28.5 - 28.0 - 26.7
Battery Voltage -------------- 25.18- 24.99- 24.98- 24.65- 24.45- 24.21- 23.89- 23.61- 23.45- 22.94
Shelter Temp Centre Top C --- 17.5 - 23.1 - 25.8 - 29.5 - 31.0 - 31.7 - 33.5 - 33.5 - 34.0 - 34.1
Permissible limit of Trial was up to Shelter Temperature of 35C. The Trial was discontinued as the Battery Voltage went low.
The PCM could have lasted for 1-2 Hours more, if the Battery Voltage had not dropped.

Electronic Cooling Chamber
Please Click to enlarge

Phase Change Materials used for electronic comfort, heat sinks

Melting Point oC Latent Heat (L.H.) KJ/Kg & Specific Gravity
Freezer Salt
-58F or -50C 325 L.H in KJ/Kg & Sp.Gr. = 1.3
-09F or -23C 330 L.H in KJ/Kg & Sp.Gr .= 1.2
-03F or -16C 330 L.H in KJ/Kg & Sp.Gr. = 1.02
Ice
 32F or 00C 335 L.H in KJ/Kg & Sp.Gr. = 1
Preservation
39F or 04C 105 L.H in KJ/Kg & Sp.Gr. = 1.4
45F or 07C 135 L.H in KJ/Kg & Sp.Gr. = 1.4
45F or 07C 300 L.H in KJ/Kg & Sp.Gr. = 1.4 Only know-how offered.
50F or 10C 170 L.H in KJ/Kg & Sp.Gr. = 1.4
59F or 15C 175 L.H in KJ/Kg & Sp.Gr. = 1.4
Air Condition - Electronics - Solar
65F or 18C 175 L.H in KJ/Kg & Sp.Gr. = 1.5
70F or 21C 175 L.H in KJ/Kg & Sp.Gr. = 1.5
75F or 24C 175 L.H in KJ/Kg & Sp.Gr. = 1.5
80F or 27C 175 L.H in KJ/Kg & Sp.Gr. = 1.5
84F or 29C 175 L.H in KJ/Kg & Sp.Gr. = 1.5
90F or 32C 210 L.H in KJ/Kg & Sp.Gr. = 1.4
97F or 36C 260 L.H in KJ/Kg & Sp.Gr. = 1.4
104F or 40C 220 L.H in KJ/Kg & Sp.Gr. = 1.4
113F or 45C 220 L.H in KJ/Kg & Sp.Gr. = 1.4
118F or 48C 220 L.H in KJ/Kg & Sp.Gr. = 1.4
136F or 58C 220 L.H in KJ/Kg & Sp.Gr. = 1.4
154F or 68C 220 L.H in KJ/Kg & Sp.Gr. = 1.8
158F or 70C 230 L.H in KJ/Kg & Sp.Gr. = 1.8
172F or 78C 240 L.H in KJ/Kg & Sp.Gr. = 1.8
192F or 89C 145 L.H in KJ/Kg & Sp.Gr. = 1.5-1.6
We have PCM & Heat-Treatment Salts upto 1100oC
The Yellow Marked Products are running items and extensively used world wide.

Finoric LLC
Email: info@finoric.com

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Finoric & Parenterals FZE, PO 10559 RAK Free Trade Zone, Ras Al Khaimah, UAE

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