CN102453468A - Mixed alkane, use of the mixed alkane and refrigeration method adopting the mixed alkane - Google Patents
Mixed alkane, use of the mixed alkane and refrigeration method adopting the mixed alkane Download PDFInfo
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- CN102453468A CN102453468A CN2011103077336A CN201110307733A CN102453468A CN 102453468 A CN102453468 A CN 102453468A CN 2011103077336 A CN2011103077336 A CN 2011103077336A CN 201110307733 A CN201110307733 A CN 201110307733A CN 102453468 A CN102453468 A CN 102453468A
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Abstract
The invention discloses a mixed alkane. The mixed alkane comprises: by weight, greater than 89% and less than or equal to 99% of propane, more than or equal to 0.5% and less than 10% of isobutene, and more than or equal to 0.5% and less than 10% of butane. The invention also provides a use of the mixed alkane in preparation of a refrigerant, and a refrigeration method adopting the mixed alkane. The mixed alkane has good refrigeration effects.
Description
Technical field
The present invention relates to a kind of mixed alkanes and application thereof and refrigerating method.
Background technology
Because R22 has good chemical stability and thermostability; Can obtain-80 ℃ refrigeration temperature; Being widely used in refrigerating and air conditioning industry, is a kind of refrigeration agent that present application quantity is maximum, range of application is the widest, but because R22 belongs to greenhouse gases; Consuming the ozone latent energy value is 0.06, will be limited and ban use of.
In order to find the substitute of R22; People have invented refrigerant R134a, R410a etc.; These refrigeration agents are zero to the destruction of ozonosphere, but the refrigerating capacity of R134a is merely 60% of R22 unit, and the thermal conductivity ratio R22 of R134a descends 10%; The water-absorbent of R134a is 20 times of R22, causes the operation expense of equipment higher; Though aspect efficient, be superior to R134a, there are shortcomings such as WP is too high, high to conduit component optimization and requirement of withstand voltage, palpus improves interchanger and unit designs, investment operation expense height in the R410a that is called as environmental protection refrigerant; And because they also have certain Greenhouse effect, the greenhouse gases effect that R410a produces in addition also part surpassed R22.Therefore, these refrigeration agents are not the final environmental protection refrigerant solution of Chinese air-conditioning industry, just the transition substitute.
In order to find the better substitute of R22 refrigeration agent, people have invented a large amount of novel refrigerants, and some are arranged is on the basis of freon refrigerant, reduces the refrigeration agent of Greenhouse effect as far as possible; Some are arranged is the mix refrigerants that on the freon refrigerant basis, add carbon-hydrogen refrigerant; Some are arranged is directly to use carbon-hydrogen refrigerant, like the R290 refrigeration agent.
CN1693408A discloses a kind of refrigeration agent, and adopting weight percent is the R290 of 55-62% and the mixing carbon-hydrogen refrigerant of the R600a that weight percent is 38-45%, in vaporization temperature-25 ℃ to 5 ℃ of alternative R134a refrigeration agents.This refrigerant mixed is simple, convenient, and is with low cost, has only 1/20 of R134a, and more energy-conservation than R134a, reduces use cost.
CN 101270274A discloses a kind of refrigeration agent; Adopting weight percent is that the R290 of 54-65%, R600a and the 3-8% pour point of 30-40% are the mixing carbon-hydrogen refrigerant of-36 ℃ to-25 ℃ freezing lubricating oil (staple is a heavy alkyl benzene); Substitute the R134a refrigeration agent; Solved existing carbon-hydrogen refrigerant effectively and made compressor often occur the wearing and tearing difficult problem of scuffing of cylinder bore because of too dry and the good characteristic of oil soluble, fractional energy savings can reach 10-20%.
CN 101402847A discloses a kind of refrigeration agent, and adopting weight percentage is the mixing carbon-hydrogen refrigerant of R600a of R290 and the 11-20% of 80-89%, alternative R22 refrigeration agent.
In the prior art, R290 and R600a be the blended carbon-hydrogen refrigerant according to a certain weight ratio, and the weight percent of R290 was less than 65% o'clock, and this kind carbon-hydrogen refrigerant is only applicable to substitute the lower R134a of evaporating pressure, and is not suitable for the higher R22 of evaporating pressure; When the weight percent content of R290 during, can substitute the R22 refrigeration agent at 80%-89%.Yet, energy-conserving and environment-protective are being required increasingly high current society, existing fractional energy savings can not meet the demands, and remains further to be improved.
Summary of the invention
The object of the invention just is to overcome above-mentioned defective, and a kind of energy-saving effect better mixing alkane refrigeration agent is provided.
The present invention provides a kind of mixed alkanes; This mixed alkanes contains propane, Trimethylmethane and butane; Wherein, be benchmark with the total amount of said mixed alkanes, the content of propane for greater than 89 weight % to being less than or equal to 99 weight %; The content of Trimethylmethane be more than or equal to 0.5 weight % to less than 10 weight %, the content of butane be extremely less than 10 weight % more than or equal to 0.5 weight %.
The present invention also provides the application of above-mentioned mixed alkanes in refrigeration agent.
The present invention also further provides a kind of refrigerating method; This method comprises with R290, R600 and R600a mixing or without compressing in the compressor of sending into refrigeration plant after mixing; Wherein, be benchmark with the total amount of R290, R600a and R600, the add-on of R290 for greater than 89 weight % to being less than or equal to 99 weight %; The add-on of R600a be more than or equal to 0.5 weight % to less than 10 weight %, the add-on of R600 be extremely less than 10 weight % more than or equal to 0.5 weight %.
The mixed alkanes refrigeration agent of alternative R22 refrigeration agent provided by the invention compared with prior art; Has following beneficial effect: through adopting the component ratio of refrigeration agent of the present invention; The saturated vapor pressure of mixed alkanes of the present invention is more near R22; Directly charge the refrigeration system of R22, the also situation during as refrigeration agent to the loss of each parts near R22, and also refrigeration agent of the present invention is more obvious than the energy-saving effect of the refrigeration agent of prior art.
Embodiment
Be elaborated below in conjunction with the embodiment specific embodiments of the invention.Should be understood that embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
The physical parameter of propane and R22 are extremely close; And the saturated vapor pressure-temperature curve of propane and R22 ten minutes are approaching; So, when being main mixed alkanes refrigeration agent with propane, can not changing the pacing items of original system major parts and directly charge as the alternative refrigerant of R22.
Because propane is a kind of combustiblesubstance, problem maximum when using as refrigeration agent is a safety-problems.In the prior art, everybody only thinks that the filling quantity of propane does not just have the danger of leaking the combustion explosion when taking place after a little while in refrigeration system.Yet contriver of the present invention finds, because the latent heat of vaporization of R290 saturated aq is than big many of R22, so when refrigeration is suitable, can significantly reduce the filling quantity of R290.And, through cooperating, can improve the EER of refrigeration plant with a spot of butane and Trimethylmethane.So, among the present invention, although the content of propane up to greater than 89 weight % to being less than or equal to 99 weight %, still can under the situation that guarantees higher security, obtain more excellent refrigeration.
Mixed alkanes mixture of the present invention is that a kind of saturated vapor pressure is more near the non-azeotropic paraffins mixture of R22; Among the present invention this mixed alkanes is called R490; This R490 than alkane refrigeration agent saturated vapor pressure of the prior art more near the R22 refrigeration agent; The refrigeration plant that directly is used for R22, and more energy-conservation than R22 refrigeration agent and mixing carbon-hydrogen refrigerant of the prior art, energy-saving efficiency reaches 20%-30%.
Although the total amount that needs only with said mixed alkanes is a benchmark; The content of propane is to being less than or equal to 99 weight % greater than 89 weight %; The content of Trimethylmethane be more than or equal to 0.5 weight % to less than 10 weight %, the content of butane for more than or equal to 0.5 weight % to can realizing the object of the invention, but under the preferable case less than 10 weight %; Total amount with said mixed alkanes is a benchmark; The content of propane is 90-95 weight %, and the content of Trimethylmethane is 1-8 weight %, and the content of butane is 1-8 weight %.Mixed alkanes in above-mentioned preferred content scope can obtain better refrigeration when being used as refrigeration agent.
According to the present invention, said mixed alkanes preferably is made up of propane and Trimethylmethane and butane.
Although as long as propane, Trimethylmethane and butane can be realized the object of the invention with above-mentioned mixed; Said propane can be the existing propane that is used for the various purity grades of refrigeration agent; Butane can be the existing butane that is used for the various purity grades of refrigeration agent; Trimethylmethane can be the existing Trimethylmethane that is used for the various purity grades of refrigeration agent, but under the preferable case, said propane is refrigerant art R290 commonly used; Butane is refrigerant art R600 commonly used, and Trimethylmethane is refrigerant art R600a commonly used.Adopt propane, butane and the Trimethylmethane of above-mentioned form, can be directly through mixing or using as refrigeration agent without mixing the compressor that directly injects refrigeration plant separately.
Mixed alkanes of the present invention directly proportional mixing obtains, and also can directly take in proportion in use.
The present invention also provides the application of above-mentioned mixed alkanes in refrigeration agent.Method of use can be with reference to the method for use of existing refrigeration agent such as R22.
Mixed alkanes of the present invention is mainly used in the air-conditioning refrigeration plant, for example split-type air conditioner and central air-conditioning.
The present invention also provides a kind of refrigerating method; This method comprises that R290, R600 and R600a mix or without compressing in the compressor of sending into refrigeration plant after mixing; Wherein, be benchmark with the total amount of R290, R600a and R600, the add-on of R290 for greater than 89 weight % to being less than or equal to 99 weight %; The add-on of R600a be more than or equal to 0.5 weight % to less than 10 weight %, the add-on of R600 be extremely less than 10 weight % more than or equal to 0.5 weight %.
Because the present invention relates generally to the improvement to the composition of refrigeration agent, therefore, can carry out with reference to prior art to other conditions and the not special qualification of concrete operations step of refrigerating method, the present invention repeats no more at this.
Under the preferable case, be benchmark with the total amount of R290, R600a and R600, the add-on of R290 is 90-95 weight %, and the add-on of R600a is 1-8 weight %, and the add-on of R600 is 1-8 weight %.
According to above-mentioned refrigerating method provided by the invention, send in the refrigeration plant after can earlier R290, R600 and R600a being mixed, also can directly send in the refrigeration plant without mixing according to aforementioned proportion.
According to the present invention, the content that contains propane, butane and Trimethylmethane and propane owing to refrigeration agent is higher relatively, therefore compares with existing R22; Can reduce filling quantity greatly; Usually, with respect to the refrigerating duty of 3.5kW, total consumption of refrigeration agent R290 of the present invention, R600a and R600 is about half of R22; But because the consumption of different air-conditioning system refrigeration agents is different, total consumption of R290, R600a and R600 is about 0.3-0.6kg.
According to the present invention, said refrigeration plant mainly is the various air-conditioning plants that are used to make extraneous cooling, for example can be split-type air conditioner and central air-conditioning.
Because the refrigeration agent that above-mentioned refrigerating method uses is mainly propane; The consistency of this refrigeration agent and lubricating oil well known by persons skilled in the art is all better; So R490 refrigeration agent of the present invention can use various lubricating oil well known by persons skilled in the art as refrigerator oil, the refrigerator oil that the preferred heavy alkyl benzene that low-temperature performance is good, price is more cheap uses as said refrigeration agent.
Below will specify the present invention through embodiment.In following examples, fractional energy savings passes through computes:
Fractional energy savings=(R22 power consumption number-R490 power consumption number)/R22 power consumption number * 100%.
Comparative Examples 1
For 1.5 split-type air conditioners of certain brand, restrain cryogen R22 with 900 and add in the compressor of air-conditioning, behind the unlatching air-conditioning, make 4.5 * 3.3 * 2.8m in the 60min
3Room temps drop to 25 ℃ and keep 25 ℃, power consumption 2.8 degree from 35 ℃.
Embodiment 1
For with 1.5 split-type air conditioners of Comparative Examples 1 identical producer and model; Add weight percent and be 90% R290, weight percent and be 8% R600a and weight percent and be mixed alkanes refrigeration agent 500 grams that 2% R600 mixes naturally; Directly add in the compressor of air-conditioning; After opening air-conditioning, make 4.5 * 3.3 * 2.8m in the 60min
3Room temps drop to 25 ℃ and keep 25 ℃ from 35 ℃, power consumption 2 degree, fractional energy savings is 28%.
Comparative Examples 2
Adopt the method for embodiment 1, different is, weight percent is 8% R600a be 2% R600 by weight percent with weight percent is 10% R600a replacement, makes 4.5 * 3.3 * 2.8m in the 60min
3Room temps drop to 25 ℃ and keep 25 ℃ from 35 ℃, power consumption 2.3 degree, fractional energy savings is 18%.
Comparative Examples 3
Adopt the method for embodiment 1; Different is; Weight percent is that 90% R290, weight percent are that 8% R600a and weight percent be 2% R600 by weight percent are that 85% R290, weight percent are that 14% R600a and weight percent are that 1% R600 replaces, and makes 4.5 * 3.3 * 2.8m in the 60min
3Room temps drop to 25 ℃ and keep 25 ℃ from 35 ℃, power consumption 2.3 degree, fractional energy savings is 18%.
Embodiment 2
For with 1.5 split-type air conditioners of embodiment 1 identical producer and model; Add weight percent successively and be 4% R600a; Weight percent is that 1% R600 and weight percent are mixed alkanes refrigeration agent 460 grams of 95% R290; Directly add in the compressor of air-conditioning, behind the unlatching air-conditioning, make 4.5 * 3.3 * 2.8m in the 60min
3Room temps drop to 25 ℃ and keep 25 ℃ from 35 ℃, power consumption 2 degree, fractional energy savings is 28%.
Embodiment 3
For with 1.5 split-type air conditioners of embodiment 1 identical producer and model; Add weight percent and be 93% R290, weight percent and be 1% R600a and weight percent and be mixed alkanes refrigeration agent 470 grams that 6% R600 mixes naturally; Directly add in the compressor of air-conditioning; After opening air-conditioning, make 4.5 * 3.3 * 2.8m in the 60min
3Room temps drop to 25 ℃ and keep 25 ℃ from 35 ℃, power consumption 2 degree, fractional energy savings is 28%.
Find out that from the data of embodiment 1-3 and Comparative Examples 1-3 R490 lacks than the filling quantity of R22, economize in raw materials, and more energy-conservation.Through embodiment 1 and Comparative Examples 2 data contrast discovery, have only the refrigeration agent energy-saving effect of propane and Trimethylmethane good not as R490 refrigerant effect of the present invention; Through embodiment 1 with Comparative Examples 3 contrasts find that propane content is lower, and three kinds of component ratios the refrigeration agent energy-saving effect within the scope of the present invention the time is not poorer than R490.
Claims (10)
1. mixed alkanes; This mixed alkanes contains propane, Trimethylmethane and butane; Wherein, be benchmark with the total amount of said mixed alkanes, the content of propane for greater than 89 weight % to being less than or equal to 99 weight %; The content of Trimethylmethane be more than or equal to 0.5 weight % to less than 10 weight %, the content of butane be extremely less than 10 weight % more than or equal to 0.5 weight %.
2. mixed alkanes according to claim 1 wherein, is a benchmark with the total amount of said mixed alkanes, and the content of propane is 90-95 weight %, and the content of Trimethylmethane is 1-8 weight %, and the content of butane is 1-8 weight %.
3. mixed alkanes according to claim 1 and 2, wherein, this mixed alkanes is made up of propane, Trimethylmethane and butane.
4. according to any described mixed alkanes among the claim 1-3, wherein, said propane is R290, and said Trimethylmethane is R600a, and said butane is R600.
5. any application of described mixed alkanes in refrigeration agent among the claim 1-4.
6. refrigerating method; This method comprises with R290, R600 and R600a mixing or without compressing in the compressor of sending into refrigeration plant after mixing; Wherein, be benchmark with the total amount of R290, R600a and R600, the add-on of R290 for greater than 89 weight % to being less than or equal to 99 weight %; The add-on of R600a be more than or equal to 0.5 weight % to less than 10 weight %, the add-on of R600 be extremely less than 10 weight % more than or equal to 0.5 weight %.
7. refrigerating method according to claim 6 wherein, is a benchmark with the total amount of R290, R600a and R600, and the add-on of R290 is 90-95 weight %, and the add-on of R600a is 1-8 weight %, and the add-on of R600 is 1-8 weight %.
8. according to claim 6 or 7 described refrigerating methods, wherein, with respect to the refrigerating duty of 3.5kW, total consumption of R290, R600a and R600 is 0.3-0.6kg.
9. according to any described refrigerating method among the claim 6-8, wherein, said refrigeration plant is an air-conditioning.
10. refrigerating method according to claim 9, wherein, said refrigeration plant uses heavy alkyl benzene as refrigerator oil.
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| CN103881659A (en) * | 2014-03-28 | 2014-06-25 | 深圳市美可达科技有限公司 | Mixed alkane as well as application and refrigeration method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101918507A (en) * | 2007-12-26 | 2010-12-15 | 新川佳伸 | Hydrocarbon mixture refrigerant, freezing/refrigerating or air-conditioning system, freezing/refrigerating or air-conditioning method, and process for producing freezing/refrigerating or air-conditioning system |
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| CN101918507A (en) * | 2007-12-26 | 2010-12-15 | 新川佳伸 | Hydrocarbon mixture refrigerant, freezing/refrigerating or air-conditioning system, freezing/refrigerating or air-conditioning method, and process for producing freezing/refrigerating or air-conditioning system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103881659A (en) * | 2014-03-28 | 2014-06-25 | 深圳市美可达科技有限公司 | Mixed alkane as well as application and refrigeration method thereof |
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Granted publication date: 20150311 Termination date: 20171010 |