Talk:Refrigeration

REFRIGERATION

At what temperature does a frige become a freezer? (unsigned)

At a temperature that allows you to operate a computer, press Backspace and type the letters "r" "e" "e" "z" "e" "r". Micasta (talk) 14:51, 28 February 2009 (UTC)

Micasta, that was a cruel and pointless comment. I don't think you made anyone laugh but yourself. —Preceding unsigned comment added by 81.107.181.33 (talk) 10:09, 28 March 2009 (UTC)

The two dead links in the ICE HARVESTING can be rectified. I found a few related links. User:Naninnewetuah 8-15-2011 —Preceding undated comment added 06:24, 15 August 2011 (UTC).

Refrigeration

Perhaps some clean up of the first line "Refrigeration is the process of removing heat from an enclosed space, or from a substance, and moving it to a place where it is unobjectionable."

That the space is enclosed does not cause the effect to be refrigeration, it could be anywhere. The place to which the heat is moved is not a determinate either. Consider a cascaded refrigeration system, the condenser of the first system is part of a liquid to liquid heat exchanger that is the evaporator of the second system.

Suggestion, Refrigeration is the process of removing heat from a localized area. SteveOak25 (talk) 21:20, 5 January 2009 (UTC)

Sentences should focus on refrigeration

This came from the "First refrigeration systems" section:

Meanwhile, James Harrison who was born in Scotland and subsequently emigrated to Australia, began operation of a mechanical ice-making machine in 1851 on the banks of the Barwon River at Rocky Point in Geelong, Victoria.

If I were doing a research on refrigeration, I wouldn't care if James Harrison were Scottish, Australian or Martian. I would be interested in what he contributed to the technology of refrigeration... and in the event that I become more interested in who James Harrison was, I'd just check out his article (there's a link to that). The phrase "who was born in Scotland and subsequently emigrated to Australia" distracts the reader from the subject of refrigeration. I've decided to re-word the sentence to "James Harrison from Scotland began operation of a mechanical ice-making machine in 1851..." His emigration to Australia need not be highlighted. Micasta (talk) 14:44, 28 February 2009 (UTC)

Warehouses

We have pages on refrigerated/reefer ships and containers, but nothing on cold storage/refrigerated warehouses. Could someone either link a page, add a section here or create an article??71.236.26.74 (talk) 22:00, 16 September 2009 (UTC)

Pretty Weak

This whole article is pretty weak, technically deficient, and it reads like an introduction to commercial refrigeration in the U.S.A.

189.188.166.197 (talk) 05:44, 3 February 2010 (UTC)

Units of Refrigeration

The section of called "Units of Refrigeration" has some good historical information in it. However, it is largely incorrect for the current industry. 1 Ton of Refrigeration (TR) is defined as precisely 12,000 BTU/hr. Secondly as this unit is defined in English Units, and is really only used where English units are used. It is rather nonsensical to have multiple SI equivalents, especially seeing as most of the rest of the World uses the Kw as the standard unit of refrigeration. I would recommend a rewording as follows.

The units of refrigeration are always a unit of power. Domestic and commercial refrigerators may be rated in kJ/s, or Btu/h of cooling. For commercial and industrial refrigeration systems most of the world uses the kilowatt (kW) as the basic unit refrigeration. Typically, commercial and industrial refrigeration systems North America are rated in Tons of Refrigeration (TR). Historically, one Ton of Refrigeration was defined as the energy removal rate that will freeze one short ton of water at 0 °C (32 °F) in one day. This was very important because many early refrigeration systems were in ice houses. The simple unit allowed owners of these refrigeration systems measure a days output of ice against energy consumption and compare their plant to one down the street. While ice houses make up a much smaller part of the refrigeration industry than they once did the unit of Tons of Refrigeration has remained in North America. The unit's value as historically defined is approximately 11,958 BTU/hr (3.505 kW) has been redefined to be exactly 12,000 BTU/hr (3.517 kW).

While not truly a unit, a refrigeration system's Coefficient of Performance (CoP) is very important in determining a system's overall efficiency. It is defined as refrigeration capacity in kW divided by the energy input in kW. While CoP is a very simple measure, like the kW, it is typically not used for industrial refrigeration in North America. Owners and manufacturers of these systems typically use Performance Factor. A systems Performance Factor is defined as a system's energy input in horsepower divided by it's refrigeration capacity in Tons of Refrigeration. Both Coefficient of Performance and Performance Factor can be applied to either the entire system or to system components. For example an individual compressor can be rated by looking at the energy required to run the compressor versus the the expected refrigeration capacity based on inlet volume flow rate. It is important to note that both Coefficient of Performance and Performance Factor for a refrigeration system are only defined at a specific operating conditions. Moving away from those operating conditions can dramatically change a system's performance.

Please provide feedback on this post. I plan to change the "Units of Refrigeration" section to this sometime after 10/18/2010 if no one has any objections. —Preceding unsigned comment added by 198.36.95.12 (talk) 14:21, 4 October 2010 (UTC)

As no one has commented on this post I am changing the section in question be be what is written here. —Preceding unsigned comment added by 198.36.95.12 (talk) 19:50, 27 October 2010 (UTC)

Refridgeration in history

Many old emperors had ice house: ie Zimri-Lin, Yongsheng Shensi, Tj'n Sje Hwang-ti, ... The "ice house" built at Yongsheng, in Shensi had a lock-mechanism and was situated near a river. I'm wondering whether none of these used a system similar to the Pot-in-pot_refrigerator, that would also be a very important thing to mention then.

91.182.251.170 (talk) 14:26, 20 November 2010 (UTC)

Introduction

Removing the third sentence as it is a slightly more technical and largely more ambiguous restatement of the first. Additionally the "this" does not refer to anything specific. Moving the last sentence to be the second sentence.

Original

Refrigeration is a process in which work is done to remove heat from one location to another. Refrigeration has many applications including but not limited to; household refrigerators, industrial freezers, cryogenics, air conditioning, and heat pumps. In order to satisfy the Second Law of Thermodynamics, some form of work must be performed to accomplish this. The work is traditionally done by mechanical work but can also be done by magnetism, laser or other means.

New

Refrigeration is a process in which work is done to remove heat from one location to another. This work is traditionally done by mechanical work but can also be done by magnetism, laser or other means. Refrigeration has many applications including but not limited to; household refrigerators, industrial freezers, cryogenics, air conditioning, and heat pumps.

food storage optimum temperature

"Optimum temperature range for perishable food storage is 3 to 5 °C (37 to 41 °F)."

It seems that for most food the ideal optimum storage temperature would be just above freezing, about 1C, 33F. Is this true? Where can one find detailed facts, tables and graphs of storage time as a function of temperature for various foods? What temperatures are used for ideal commercial storage of various foods?-96.237.13.111 (talk) 14:33, 19 November 2011 (UTC)