Performance Study of Open Pond as Heat Sink of Water-Cooled Air Conditioner

In this paper, we show that improved air circulation above a heat sink is possible using thin winglet-type vortex generators that can be passively retrofitted to an existing unit. By mounting these vortex generators on the leading edge of heat sink fins, pairs of counter-rotating vortices are induced within the interfin spacing. The vortices disturb the boundary layers and serve to mix the air in the interfin channel. The devices we have designed are passive and can be added to existing systems using a simple clip-on mechanism. In this study, several designs are experimentally investigated for the purpose of identifying the optimal configuration that will be most conducive to flow enhancement and, therefore, heat transfer augmentation. Using the typical operational range of air velocities for PCs, routers and servers, an experimental simulation of the interfin channel reveals that certain vortex generators, when placed upstream, can outperform others in their ability to fill the channel with pairs of strong vortices. Multiple pairs can also be generated to further accentuate the heat transfer using dual vortex generators. A description of the specific shapes is furnished here along with particulars of the performance study. By control and manipulation of the vortices, our results suggest the possibility of optimizing the generator design. Experimentation was conducted in two phases. The first phase is a study of the ability to generate and control vortices within the fin channel. This aspect was simulated using a Lexan mock-up of the fin channel that permits introduction of glycerin smoke to visualize the shape, size, strength and structure of the vortices. The clear Lexan permitted viewing of the vortices by passing a red planar laser through the apparatus. The second phase involved using the optimization data gained in the first phase to generate vortices in an actual heat sink fitted with thermocouples to measure the temperatures at various points during heating.

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ANALISIS PERFORMA SISTEM PENDINGIN RAMAH LINGKUNGAN UNTUK KABIN MOBIL CITY CAR MENGGUNAKAN MODUL TERMO ELECTRIC COOLER TERHADAP KONSUMSI BAHAN BAKAR

Turbo Jurnal Program Studi Teknik Mesin ◽

10.24127/trb.v6i2.580 ◽

2017 ◽

Vol 6 (2) ◽

Author(s):

Mirza Yusuf ◽

Andika Wisnujati

Keyword(s):

Heat Sink ◽

Air Conditioner ◽

Thermo Electric

Ramah lingkungan menjadi isu yang gencar dalam penelitian. Cloro Fluoro Carbon (CFC) yang digunakan dalam AC konvensional akan menguap ke udara bebas berdampak kerusakan lapisan ozon. Ditinjau secara micro dalam penggunaan sitem pendingin dapat diterapkan pada pendingin kabin mobil. System pendingin mobil konfensional menimbulkan 2 kerugian yaitu lebih boros bahan bakar karena couple pulley compressor AC membebani putaran mesin dan penggunaan CFC yang tidak ramah lingkungan. System pendingin ramah lingkunagan dan mampu menghemat bahan bakar mesin tersebut dapat kita temukan pada modul thermoelectric. terobosan baru sistem pendingin tersebut menggunakan modul pendingin Thermo Electric Cooler (TEC) yang memanfaatkan sisi dingin pada Thermo Electric Cooler (TEC) dengan memanfaatkan seaback effect . Thermo Electric Cooler (TEC) ketika dialiri tegangan DC (arus searah) pada kedua jalur kabel penghubungnya maka salah satu sisi akan menjadi panas, sementara sisi satunya akan menjadi dingin. Salahsatu cara yang dapat ditempuh untuk memaksimalkan proses pendinginan, maka sisi panas Thermo Electric Cooler (TEC) harus diturunkan temperaturenya serendah mungkin mungkin dengan menggunakan alat penukar kalor heat sink serta dibantu kipas(fan). semakin lama proses pendinginan, maka semakin optimal suhu ruangan yang didinginkan. Dari data Hasil pengujian dapat diketahui perangkat pendingin tersebut mampu bekerja dengan rate penurunan temperature memadai. Selanjutnya dapat dapat diaplikasikan sebagai alat pendingin ruangan yang efektif, efisien dan ramah lingkungan. Kata kunci: Kabin mobil, Air Conditioner (AC) konvensional, Cloro Fluoro Carbon (CFC), Thermo Electric Cooler (TEC), komponen sistem pendingin.

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Performance Enhancement of Air Cooled Heat Sink Used in Inverter Drives of Residential Air Conditioners

International Journal of Air-Conditioning and Refrigeration ◽

10.1142/s201013252050008x ◽

2020 ◽

Vol 28 (01) ◽

pp. 2050008

Author(s):

Vignesh Lakshmanan ◽

Pushpak Doiphode ◽

Indraneel Samanta

Keyword(s):

Heat Transfer ◽

Thermal Performance ◽

Heat Sink ◽

Performance Enhancement ◽

Air Conditioner ◽

Electronic Components ◽

Variable Frequency Drive ◽

Air Conditioners ◽

Baseline Case ◽

Heating Load

Inverter air conditioners are being widely used in the air conditioning sector for energy saving purposes. These air conditioners use an inverter or a variable frequency drive (VFD) to control the compressor operating speed based on cooling or heating load fluctuations. If the heat generated by the electronic components of the VFD is not dissipated properly, it can lead to failure of the VFD. In general, a heat sink is used for dissipating the heat generated by the electronic components of the VFD. The heat sink can be either air cooled or liquid cooled. Using computational fluid dynamics (CFD), this paper deals with optimization of the thermal performance of an air cooled plate-fin heat sink with rectangular fins used in a residential split inverter air conditioner. Commercially available CFD tool has been used for simulations. It has been observed that enhancing fluid flow around the heat sink and improving heat transfer area of the fins significantly improve the thermal performance of the heat sink. By using heat sink with rectangular fins having a stepped profile, it has been possible to improve the heat transfer from the baseline case by 27%. Whereas, by using hollow fins, heat transfer improvement of 20% has been achieved.

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Performance Study on Solar Hybrid Air-Conditioning System for Residential Water Heating

MATEC Web of Conferences ◽

10.1051/matecconf/201824801003 ◽

2018 ◽

Vol 248 ◽

pp. 01003

Author(s):

Kaidir ◽

Mulyanef ◽

Burmawi

Keyword(s):

Air Conditioning ◽

Energy Savings ◽

New Technology ◽

Energy Crisis ◽

Air Conditioner ◽

Performance Study ◽

Water Heating ◽

Water Heaters ◽

The Government ◽

Save Energy

The Government of Indonesia has done some efforts to overcome energy crisis nationwide. Among them by issuing a policy as the Foundation for the development and improvement of the capacity of providing energy. The Government has issued a presidential instruction number 10 of the year 2005 on energy savings and last Presidential Instruction No. 2 of the year 2008 about saving energy and water. One of the implementation efforts of this energy crisis is overcome with effort saves energy consumption on the air conditioning with develop hybrids air conditioning, namely as the air conditioner at the same time to the water heating. This research is a new technology for energy saving of electricity. The purpose of this research is to produce a prototype of a hybrid energy efficient refrigeration machine that can be function simultaneously as the engine room air conditioner at the same time water heaters. Specific research targets to be achieved is the realization of a prototype of a hybrid air conditioning engine capacity 1.5 PK which can save energy around 60%. The method of research is the planning, creation, testing the performance of air conditioning machines of compression cycle steam hybrid.

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