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All Journal J-ENSITEC (Journal of Engineering and Sustainable Technology) Edelweiss : Journal of Innovation in Educational Research
Subir
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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ANALISIS UNJUK KERJA AIR CONDITIONING (AC) SPLIT 2 PAARDE KRACHT (PK) MENGGUNAKAN REFRIGERANT 22 DENGAN MUSICOOL 22 TERHADAP KONSUMSI LISTRIK Subir; Lucianus Handri Gunanto; Bustani; Susilo, Rizky Aprylianto; Agustono
J-ENSITEC Vol. 11 No. 01 (2024): December 2024
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jensitec.v11i01.11869

Abstract

The total use of electrical energy in a building or structure, one of them is the use of an air conditioning (AC) system. There are still many uses of air conditioning (AC) systems based on halocarbon refrigerants (R-22) in a building or structure. Refrigerant 22 is a type of halocarbon refrigerant that is widely used in Split ACs. The author conducted research on an LG 2 PK AC by replacing the refrigerant which was still based on Refrigerant 22 with the hydrocarbon refrigerant Musicool 22, then the data results were analyzed to determine the performance of the AC. From the results of the refrigerant retrofitting carried out on March 1, 2022, it was 1,715 Watts. After replacing the refrigerant type from refrigerant 22 to Musicool 22 refrigerant, the electric current dropped to 1,305 Watts in April 2022, 1,352 Watts in May 2022 and 1,346 Watts in June. so that the electrical power efficiency was obtained by 369 Watts and the percentage of electrical power savings was 21.51% compared to March 2022. An alternative to replace halocarbon-based refrigerants in the Split air conditioning (AC) system is hydrocarbon refrigerants, this is a solution in terms of using more environmentally friendly refrigerants and a small global warming effect. 
IMPROVING SPEAKING SKILLS THROUGH SPEECH ACTIVITY OF ENGLISH CLUB AT DARUNNAJAH BOARDING SCHOOL: IMPROVING SPEAKING SKILLS THROUGH SPEECH ACTIVITY OF ENGLISH CLUB AT DARUNNAJAH BOARDING SCHOOL Lisan, Khusnul; Subir
Edelweiss : Journal Of Innovation In Educational Research Vol. 1 No. 3 (2024): Edelweiss : January 2024
Publisher : CV. Mitkom Indotama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62462/edelweiss.v1i3.12

Abstract

ABSTRACT The abstract aimed at improving speaking skills through speech activity of English Club since speaking was still considered as the hardest skill in the place. This research was conducted using Classroom Action Research (CAR). There were 60 students as research subjects, 40 females, and 20 males. They were the students of Darunnajah Boarding school. This research was conducted in two cycles, each consisted of planning, implementation, observation, and reflection. Data were collected through quantitative in the form of test and qualitative data in the form of observation and interview. The results of this study indicated that there was an increase in students' speaking skills. This was proved with result of student test from cycles 1 to 2. This showed that the scores and averages in the second cycle were better than the first cycle. The percentage of students who got points >75 also increased. In the pre-test students who got points >75 and above were 9 students (15%). In the post-test of cycle, I students who scored >75 and above were 20 students (33%). In the post-test of cycle II, there were 52 students (86%) who got score more than >75. In other words, students' speaking ability increased and became better after implementing speech technique.
Co-Authors Agustono Bustani Ibrahim Lisan, Khusnul Lucianus Handri Gunanto Susilo, Rizky Aprylianto