SINERGI Vol. 24, No. 2, June 2020: 81-86 http://publikasi.mercubuana.ac.id/index.php/sinergi http://doi.org/10.22441/sinergi.2020.2.001 . D. Romahadi et al., Condenser Design Analysis with Kays & London Surface Dimensions 81 CONDENSOR DESIGN ANALYSIS WITH KAYS AND LONDON SURFACE DIMENSIONS Dedik Romahadi 1 * , Nanang Ruhyat 1 , L. B. Desti Dorion 2 1 Mechanical Engineering Department, Faculty of Engineering, Universitas Mercu Buana Jl. Raya Meruya Selatan, Kembangan, Jakarta 11650, Indonesia 2 Mechanical Engineering Department, Nanjing University of Science and Technology 200 Xiaolingwei Road, Xuanwu District, Nanjing 210094, China *Corresponding Author Email: dedik.romahadi@mercubuana.ac.id Abstract -- The use of condensers in air conditioning units is more common in large-capacity units than in ones with a smaller capacity. Air conditioning provides comfort and freshness to an air- conditioned room. It should be noted that each room has a different heat load, which affects the specifications of the condenser used. The accuracy with which appropriate condenser specifications are determined affects the performance of the air conditioner. Thus, considering how important condenser needs are, it is necessary to design condensers with optimal performance, which adhere to proven standards. To achieve this, the design of a condenser should be based on the results of the smallest condenser dimensions of three types of surfaces, as they are intended for a limited place. This condenser design uses the standard dimensions of the Kays and London charts. Data is collected by measuring the results of temperature and enthalpy of a refrigerant at desuperheating and condensation, inlet air temperature, outlet air temperature, refrigerant mass flow rate, and air mass flow rate. The results of the compact condenser design are based on existing data, which is obtained from the smallest design results. The result uses the type of Surface CF-8.72(c) with a heat transfer area of 0.259 m 2 , a total tube length of 9.5 m, crossing tube length 0.594 m and a pressure drop of 3778 Pascal (Pa) on the side of a tube. This design fulfills the stipulated requirements, as the pressure drop is less than the specified maximum limit in most units. Keywords: Condenser; Air Conditioning; Heat Exchanger Copyright © 2020 Universitas Mercu Buana. All right reserved. Received: May 1, 2019 Revised: September 14, 2019 Accepted: September 24, 2019 INTRODUCTION The use of condensers in air conditioning units has expanded from small-capacity units to large-capacity ones due to rising temperatures in Indonesia, especially Jakarta, over time. The two laws of thermodynamics contain two terms: refrigeration and air conditioning. It should be noted that the fields of refrigeration and air conditioning are interconnected, but each has a different scope [1], [2]. Air conditioning in the form of temperature regulation, humidity regulation, and air quality. While refrigeration is used for specific process needs such as refrigeration for household, general, and industrial purposes [3], [ 4]. The condenser is a very important cooling component that functions to maximize efficiency in the cooling engine [5], [6]. In this condenser, heat is released by condensation and sensible heat. In general, using a surface condenser, this type of condenser is a compact type in which refrigerants are circulated through the tube [7], [8]. The outside air condenser usually uses a cooling refrigerant circulation from the which is assisted by the fan to release heat into the atmosphere [9]. The most working fluid flows continuously in a heat exchanger, after exceeding a certain operating time, it will pollute the heat transfer surface [10], [11]. The deposits formed on most surfaces will have a sufficiently low thermal conductivity, which will result in a decrease in the global heat transfer coefficient in the heat exchanger, resulting in a lower exchange rate of heat energy in the heat exchanger [12], [13]. To get the best performance, the heat exchanger must be designed carefully and optimally. Therefore, mastery of the design method of a heat exchanger is very important because it will provide a very large contribution to efforts to improve the performance of industrial installations, which also means efforts to save energy, especially in the industrial sector [14, 15, 16]. The heat exchanger can be called a compact heat exchanger when the area for the