ما المقصود ب nplv ,iplv في ال chiller

[younis engineer]

ما المقصود ب nplv ,iplv في ال chiller

ارجو الافادة اخواني.

 

[younis engineer]

الرجاء الافادة ,اعلم ان الامر يتعلق بال efficiency ولكني احتاج الى شرح وما هو الفرق بين NPLV و IPLV

 

[The Jet]

تحيه
اخى الكريم اليك المعنى
Integrated Part Load
Value
Non-Integrated Part Load
Value
وهذه تدخل ضمن تصميم الشلرات الجديده من عام 1998 فى الاداء تضمّنُ أيضاً a تنقيح المبخّرِ
العاملِ مِنْ 0.00025 إلى 0.0001.
تحياتي
​

 

[م/زيكو تك]

تحيه

اخى الكريم اليك المعنى
Integrated Part Load
Value
Non-Integrated Part Load
Value
وهذه تدخل ضمن تصميم الشلرات الجديده من عام 1998 فى الاداء تضمّنُ أيضاً a تنقيح المبخّرِ
العاملِ مِنْ 0.00025 إلى 0.0001.
تحياتي​

Non-Integrated Part Load Value :29:
Non-standard Part Load Value :28:

 

[Eng.Mohd-Saleh]

IPLV : is an abbreviation for Integrated Part Load Value. Like the EER, the IPLV rating was developed by the Air-Conditioning and Refrigeration Institute. (In 1998, the ARI released a revised Standard, ARI 550/590-98 to cover IPLV.) Unlike the EER, however, the IPLV measures the efficiency of air conditioners under a variety of conditions -- that is, when the unit is operating at 25%, 50%, 75% and 100% of capacity and at different temperatures.
IPLV is only calculated for non-residential central air conditioners -- if you are purchasing a central air conditioning unit for your home, you should compare efficiency based on the SEER rather than the IPLV
.
​

 

[The Jet]

non-integrated part load value :29:
Non-standard part load value :28:

تاكد من المعنى اخى الكريم واظنني الاقرب اى الاجابه :77:
تحياتي :28::28::28::28::28:

 

[م/زيكو تك]

تاكد من المعنى اخى الكريم واظنني الاقرب اى الاجابه :77:
تحياتي :28::28::28::28::28:

لانها:28: non standard وليست :29:nonintegrated

Equipment Rating Standards​

The Air-Conditioning & Refrigeration Institute (ARI) establishes rating standards
for packaged HVAC equipment. ARI also certifies and labels equipment through
programs that involve random testing of a manufacturer​

​

​

​

’s equipment to verify
published performance. These equipment rating standards have been
developed to aid engineers in comparing similar equipment from different
manufacturers. Chiller full-load efficiency is described in terms of kW/ton and
coefficient of performance (COP). Additionally, two efficiency values developed
by ARI that are receiving increased attention are the Integrated Part-Load
Value (IPLV) and Non-Standard Part-Load Value (NPLV).
ARI’s part-load efficiency rating system establishes a single number to estimate
both the full- and part-load performance of a stand-alone chiller. As part of ARI
Standard 550/590–1998, Water-Chilling Packages Using the Vapor-Compression
Refrigeration Cycle, and ARI Standard 560–1992, Absorption Water Chilling-
Heating Packages, chiller manufacturers may now certify their chiller part-load
performance using the IPLV and NPLV methods. This gives the engineering
community an easy and certified method to evaluate individual chillers.
Understanding the scope and application limits of IPLV and NPLV is, however,
crucial to their validity as system performance indicators.​

​

The IPLV predicts chiller efficiency at the ARI standard rating conditions, using
weighted-average load curves that represent a broad range of geographic
locations, building types, and operating-hour scenarios, both with and without
an airside economizer. The NPLV uses the same methods to predict chiller
efficiency at non-standard rating conditions. Although these weighted-average
load curves place greater emphasis on the part-load operation of an average,
single-chiller installation, they will not​

​

​

​

—by definition—represent any
particular installation.
Additionally, ARI notes that more than 80 percent of all chillers are installed in
multiple-chiller systems. Chillers in these systems exhibit different unloading
characteristics than the IPLV weighted formula indicates. Appendix D of
Standard 550/590–1998 explains this further:
The IPLV equations and procedure are intended to provide a singlenumber,
part-load performance number for water-chilling products.
The equation was derived to provide a representation of the average
part-load efficiency for a single chiller only. However, it is best to use a
comprehensive analysis that reflects the actual weather data, building
load characteristics, operational hours, economizer capabilities, and
energy drawn by auxiliaries, such as pumps and cooling towers, when
calculating the chiller and system efficiency.

Here is the important part:

This becomes increasingly important with multiple-chiller systems
because individual chillers operating within multiple-chiller systems
are more heavily loaded than single chillers within single-chiller
systems.​

 

[younis engineer]

شكرا لكم اخواني

اطمع في من لديه المزيد.

 

[000403]

شكرا لكم



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[Badran Mohammed]

مشكور معلومات مفيدة

 

[ahmadjet]

iplv : is an abbreviation for integrated part load value. Like the eer, the iplv rating was developed by the air-conditioning and refrigeration institute. (in 1998, the ari released a revised standard, ari 550/590-98 to cover iplv.) unlike the eer, however, the iplv measures the efficiency of air conditioners under a variety of conditions -- that is, when the unit is operating at 25%, 50%, 75% and 100% of capacity and at different temperatures.

Iplv is only calculated for non-residential central air conditioners -- if you are purchasing a central air conditioning unit for your home, you should compare efficiency based on the seer rather than the iplv
.​

عناية المهندس الكريم...
بخو الرجوع الى ال seer فانا اختلف معاك
ذلك ان seer تعطينا قيما مغلوطة عن كفاءة الوحدة
بحيث انها تقيس معدل الكفاءة عند التشغيل على مدار العام فيدخل فيها اليف والشتاء
مما سيجعل الكفاءة تبدة اعلى من الحقيقة
بحيث انه يهمنا التكييف في اليف وليس على مدار العام
وهذا ال seer يستخدم لدول مثل امريكا واوروبا
فانتبه عند شراء وحدة من مصنع امريكي واطلب الeer بدل ال seer
ودمتم

 

[مهندس الاشغال]

مشكككككوووووووووووووووووووووووووووررررررررررررررررررررررررررررر

 

[نصير عبد الرزاق]

بارك الله فيكم يا أخواني . وشكرا