Performansi Mesin Pendingin Tipe Chiller Untuk Cold Storage Dan Indoor Menggunakan Ethylene Glycol Coolant

Refrigeration device is used to reduce the temperature of the room or cooled material by absorbing heatfrom the room/material. The most refrigeration device operated by using the vapor compression refrigerationcycle. This research was done experimentally using refrigeration device chiller type to cool the ethylene glycolcoolant in the refrigeration box (evaporator unit), and ethylene glycol coolant is used to absorb heat in coldstorage and indoor (test room). The results show for the circulation of ethylene glycol coolant to the coldstorage COP value is 2.80, while the circulation of ethylene glycol coolant to the indoor COP value is 5.12. Onthe testing of ethylene glycol coolant was circulated to the indoor with 1000 Watt cooling load, the COP value is5.19, and for circulated to the cold storage and indoor simultaneously COP is of 3.66. The performance ofchiller refrigeration device is influenced by the cooling load, the greater of cooling load that would affect thework of the compressor so that the pressure in compressor increase and the energy consumption to operate thecompressor also increasing too

Pengaruh Alat Ekspansi terhadap Temperatur dan Tekanan pada Mesin Pendingin Siklus Kompresi Uap

At this time the more widespread use of engine cooling of homes, offices, hotels, cars, hospitals, and industries. The use of engine cooling capacity varies from small to large. Engine cooling is the most widely used today is the engine cooling operating with vapor compression cycle. One of the basic components that operate the engine cooling vapor compression cycle is the expansion tools. The usefulness of the expansion tools is to reduce the pressure expansion of liquid refrigerant from the condenser exit and regulating the flow of refrigerant into the evaporator entrance. Expansion tools will regulate the flow of refrigerant can be manual or automatic. For optimal cooling requirements, it is important to determine the effect of expansion tools with temperature and pressure of the vapor compression engine cooling cycle is. The test using a thermostatic valve is more efficient compared with the capillary tube, this is due to the use of the thermostatic valve will provide temperature and working pressure lower than the capillary tube, so that the process will lead to greater heat absorption and compressor work will be lighter so the power consumption will be becomes smaller

Alat Pendingin dan Pemanas Portable Menggunakan Modul Termoelektrik Tegangan Input 6 Volt dengan Tambahan Heat Pipe sebagai Media Pemindah Panas

Portable coolers and heaters use thermoelectric modules with an additional heat pipe as a heat transfer median. This research is to know the cooling temperature that can be achieved by the utilization of thermoelectric heat exhaust as heater with 6 volt input voltage. The effect of heat pipe USAge on cooling and heating temperatures is also observed. In this study the use of heat pipe provides a better cooling effect where the temperature is lower than the test without heat pipes for 50 minutes. Achievement of cooling and heating chamber under non-heat-free heat pipe 23.41 oC and 32.36 oC, whereas by using heat pipe the achievement of cooling and heating chamber reaches 22.83 oC and 30.52 oC. Tests by using an additional heat pipe as a heat transfer achievement of cooling chamber and heating chamber become lower compared with testing without heat pipe

Kinerja Kolektor Pemanas Air Tenaga Surya Menggunakan Bekas Kaleng Minuman sebagai Absorber dengan Air yang Bersirkulasi pada Pembukaan Katup 30o

Nowadays, hot water is widely used for bath. For produce hot water, people usually use furnace to boil the water and other use an electricity to heat the water. Research in solar water heater can be the alternative to get hot water without using fossil fuels, replace the furnace and water that used electricity. In this study the solar collector was made the beverage cans as the absorber. The purposes of this study was to achieve the value of efficiency of solar collector and temperature of water at the outlet of storage tank, which the water circulation and a valve were opened at 30o. The dimensions of solar water heater were 2.3 meter in length, 0.8 meter in width and 1.8 meter in height and its volume of 127 L. The solar collector was placed at outside of laboratory Universitas Riau for 9 hours. The data taken from the testing were the temperature of absorber, flow rate, light intensity and temperature of water inlet and outlet. The result of this study showed the second day of the experiment, that was a better efficiency with 34.5%. Whilst, the highest temperature of water circulation was 44.9oC that was occurred in the first day

Pengaruh Beban Pendinginan terhadap Temperatur Sistem Residential Air Conditioning Hibrida dengan Kondensor Dummy Tipe Multi Helical Coil Menggunakan Refrigeran Hidrokarbon

One way to save the energy is to improve the energy efficiency with combining two different equipmentsbecome one new double-function or hybrid equipment. Hybrid air conditioning can improve energy efficiency byremoving waste heat to the environment through condenser for heating water. The objective of this experimentalstudy is to investigate the effect of cooling load to system temperature of vapor-compression cycle hybrid airconditioning system with multi helical tipe of dummy condenser. The test was conducted with several coolingload variations (0, 1000, 2000 and 3000 Watt) as residential cooling load simulation. The result showed that therefrigerant temperature while using HCR-22 was obtained about 67.47 °C to 72.93 °C. The temperature ofrefrigerant was increased as well as the applied cooling load to be increased. The temperature of refrigeranthad more heat which to be absorbed and released into the environment so that the produced water temperaturewasalso increased. Hot water temperature of the ACWH system using HCR-22 refrigerant was obtained about41.01-44.96 ˚C

Pengaruh Penggunaan Katup Ekspansi Jenis Kapiler dan Termostatik terhadap Tekanan dan Temperatur pada Mesin Pendingin Siklus Kompresi Uap Hibrida

Research conducted into 4 variation is varied using capillary expansion valve standard conditions, thermostatic expansion valves standard conditions, capillary expansion valve with additional hotspot water heater, and thermostatic expansion valve with additional hotspot water heater. Data is collected every five minutes during the 120 minutes of testing. The research aimed to find out the performance of the engine coolant when the use of capillary expansion valve, thermostatic water heater and additional Hotspot Water Heater (HWH). Performance cooling machine includes pressure and temperature. The test results demonstrate the use of standard conditions thermostatic expansion valve compressor working pressure lower at 322.37 Psia thermostatic and 323.2 Psia capillary compared to 0.26% while the condition with the use of thermostatic valves HWH lower at 274.03 psia thermostatic compared to the capillary 287.37 psia amounted to 4.64%. To pressure thermostatic expansion valve using standard conditions and with the use of HWH lower than that of thermostatic capillary than the capillary are 92.12 Psia and 105.95 Psia at 13.05% and thermostatic 67.28 Psia and 94.45 Psia compared capillary amounted 28.77%, Compressors temperature for use thermostatic standard conditions and with the use of HWH higher than the capillaries are 90.85oC thermostatic compared capillary 83.74 oC at 7.83% and 91.31 °C thermostatic compared to the capillary 79.77 °C at 12.64%. For the hotspot temperature in the water heater using thermostatic higher than the capillaries are 87.26 oC thermostatic compared capillary 77.34 oC at 11.37% while the hotspot temperature of the water heater out thermostatic more likely the same that thermostatic capillary 46.95oC than 48.44 °C of 3.07%