scholarly journals Analisa kinerja cooling tower tipe counter flow induced draft

2021 ◽  
Vol 2 (2) ◽  
pp. 72-77
Author(s):  
Luh Putu Ike Midiani ◽  
◽  
I Wayan Temaja ◽  
I Putu Merta Adnyana ◽  
I Kadek Dwiana ◽  
...  
Keyword(s):  
Cooling Tower ◽  
Counter Flow ◽  
Blow Down

Paper ini bertujuan untuk memberikan wawasan tentang kinerja menara pendingin. Menara pendingin yang diamati adalah menara pendingin tipe counterflow induced draft. Analisa dilakukan untuk mengetahui pengaruh temperatur lingkungan terhadap kinerja menara pendingin, kerugian energi dan alternatif perbaikan. Metode yang digunakan adalah pengumpulan data operasional, pengolahan data dan selanjutnya menganalisa hasil pengolahan data. Parameter kinerja menara pendingin yang dicari meliputi range, approach, efektifitas, kapasitas pendinginan. Kerugian yang terjadi selama operasional menara pendingin seperti kerugian penguapan, blow down dan drift juga dihitung. Hasil analisa kinerja menara pendingin menyatakan bahwa efektivitas menara pendingin tinggi karena laju penguapan yang tinggi dan lebih sedikit kehilangan karena penguapan, blowdown, dan drift. Laju penguapan yang tinggi dapat terjadi karena jumlah uap air yang rendah di udara dan menunjukkan kelembaban relatif yang rendah, sehingga penurunan temperatur wet bulb akan besar.

scholarly journals Analisa Kebutuhan Make Up Water Cooling Tower RSG-GAS pada Daya 30 MW Setelah Revitalisasi

2020 ◽  
Vol 17 (1) ◽  
pp. 38
Author(s):  
Pranto Busono ◽  
Santosa Pujiarta
Keyword(s):  
Cooling Tower ◽  
Water Cooling ◽  
Counter Flow ◽  
Evaporation Loss

Akibat kondisi dan usia dari cooling tower RSG-GAS maka telah dilakukan revitalisasi pada cooling tower tersebut. Cooling tower yang baru mempunyai tipe sama dengan tipe sebelumnya, yaitu tipe Mechanical induced draft, counter flow, Inline, Closed end. Akibat penggantian/revitalisasi cooling tower RSG-GAS maka perlu dilakukan kajian yang berkaitan dengan besarnya kehilangan air. Kehilangan air pada cooling tower terdiri atas: evaporation loss (We), Drift loss (Wd) dan blowdown (Wb). Besarnya kehilangan air berdasarkan desain 93,8074 m3/h, hasil perhitungan 53,1286 m3/h dan hasil pengamatan adalah sebesarnya 39,4548 m3/h. Kehilangan air pada cooling tower perlu dilakukan perhitungan karena berkaitan dengan kemampuan pompa PA-04 dalam mengkompensasi kehilangan air tersebut. Dengan kemampuan pompa PA-04 yang mempunyai kapasitas 100 m3/h, maka dapat dipastikan bahwa pompa PA-04 masih mampu untuk mengkompensasi kehilangan air di cooling tower.   Kata kunci : make up water, revitalisasi cooling tower, kehilangan air

scholarly journals Dynamic Modeling of Mechanical Draft Counter-Flow Wet Cooling Tower With Modelica

2010 ◽  
Author(s):  
Xiao Li ◽  
Yaoyu Li ◽  
John E. Seem
Keyword(s):  
Dynamic Modeling ◽  
Cooling Tower ◽  
Transient Behavior ◽  
Counter Flow ◽  
Inlet Conditions ◽  
The One ◽  
Control Volumes ◽  
Air Conditioning Systems ◽  
Volume Method ◽  
Energy Balances

Cooling towers are important equipments for the heating, ventilation and air conditioning systems in commercial buildings, rejecting the process heat generation to the atmosphere. Dynamic modeling of cooling tower is beneficial for control design and fault detection and diagnostics of the chilled-water systems. This paper proposes a simple and yet effective dynamic model for a typical mechanical draft counter-flow cooling tower. The finite volume method is applied to the one-dimensional heat and mass transfer analysis. With control volumes defined separately for the water and air sides, the dynamic equations are constructed with the mass and energy balances. The steady-state performance of the proposed model is evaluated with the experimental data from literature. The transient behavior is simulated under the changes of tower inlet conditions, with the performance to be evaluated in the future with field test data.

scholarly journals Experimental Study on Effect of Water Spray Characteristics on Performance of Cooling Tower

2020 ◽  
Vol 170 ◽  
pp. 01009
Author(s):  
Akshay S. Dhurandhar ◽  
Amarsingh B. Kanase-Patil
Keyword(s):  
Power Plants ◽  
Cooling Tower ◽  
Thermal Power ◽  
Evaporative Cooling ◽  
Hot Water ◽  
Spray Angle ◽  
Counter Flow ◽  
Steam Power ◽  
To Come ◽  
Spiral Type

Cooling tower is an indispensable part, used as a direct contact type heat exchanger mainly for evaporative cooling. Cooling tower generally dissipates, remove heat from thermal power plants. In an induced draft cooling tower of counter flow, used for a mini-steam power plant, hot water enters at the top, while the air is introduced at the bottom and exits at the top, air is allowed to come in contact with falling water droplets, causing evaporative cooling. A possibility of desired change with different spray angle, patterns, is tried and analysed. On findings, best suited spray nozzle angle resulted is 90°, and amongst three spray patterns, full cone, hollow cone and spiral type nozzle; full cone nozzle of 90° spray angle helps achieving efficiency up to 82%. The range increases successively from 9.8°C to 15.5°C for FC nozzle, in approach to WBT; the desirable fall of 3.56°C is attained with effectiveness of 81.63%.

scholarly journals Counter flow induced draft cooling tower option for supercritical carbon dioxide Brayton cycle

2015 ◽  
Vol 295 ◽  
pp. 549-558 ◽  
Author(s):  
Sandeep R. Pidaparti ◽  
Anton Moisseytsev ◽  
James J. Sienicki ◽  
Devesh Ranjan
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Cooling Tower ◽  
Brayton Cycle ◽  
Counter Flow ◽  
Supercritical Carbon

scholarly journals The Effect of Air Parameters on the Evaporation Loss in a Natural Draft Counter-Flow Wet Cooling Tower

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6174
Author(s):  
Wei Yuan ◽  
Fengzhong Sun ◽  
Ruqing Liu ◽  
Xuehong Chen ◽  
Ying Li
Keyword(s):  
Temperature Difference ◽  
Heat Dissipation ◽  
Cooling Tower ◽  
Air Humidity ◽  
Counter Flow ◽  
Natural Draft ◽  
Evaporation Loss ◽  
Relative Air Humidity ◽  
Evaporation Heat ◽  
Rate Of Evaporation

The measures to reduce the impact of evaporation loss in a natural draft counter-flow wet cooling tower (NDWCT) have important implications for water conservation and emissions reduction. A mathematical model of evaporation loss in the NDWCT was established by using a modified Merkel method. The NDWCTs in the 300 MW and 600 MW power plant were taken as the research objects. Comparing experimental values with calculated values, the relative error was less than 3%. Then, the effect of air parameters on evaporation loss of NDWCT was analyzed. The results showed that, with the increase of dry bulb temperature, the evaporation heat dissipation and the evaporation loss decreased, while the rate of evaporation loss caused by unit temperature difference increased. The ambient temperature increased by 1 °C and the evaporation loss was reduced by nearly 26.65 t/h. When the relative air humidity increased, the evaporation heat dissipation and evaporation loss decreased, and the rate of evaporation loss caused by unit temperature difference decreased. When relative air humidity increased by 1%, the outlet water temperature rose by about 0.08 °C, and the evaporation loss decreased by about 5.63 t/h.

scholarly journals Type and quality of energy and water in a tropical hospital

2018 ◽  
Vol 67 ◽  
pp. 04020
Author(s):  
Andreas Prasetyadi ◽  
Atit Koonsrisuk
Keyword(s):  
Cooling Tower ◽  
Water System ◽  
Continuous Operation ◽  
End User ◽  
Blow Down ◽  
Hospital System ◽  
Input And Output ◽  
Tropical Area ◽  
Starting Point

A hospital is considered an energy gobbler and a water consumer. The energy and water go for many activities in hospital system. HVAC that includes wet cooling tower is the main energy and water consumer in a hospital due to its continuous operation. Conservation of both resources partially depends on the way nexus is managed at the end user. Mapping the energy and water in term of type and quality is proposed as the starting point in managing both as nexus. This article focuses on that part in purpose of integrating energy and water system in a hospital. SUTH, a 120 beds hospital located in tropical area in Thailand that operates daily with 146 m3 water and 1.5 MW of electricity becomes the case of the study. The input and output of energy and water of each subsystem are exposed in addition to subsystems that are described in some different methods. The results show flows of energy and water as by-product that can be used for other systems. Radiology and HVAC release very low enthalpy heat that could not be managed for other utilization, but hemodialysis releases very low heat that is used for its own process. Autoclaves can releases heat that be used for laundry and its own pre-heating. HVAC release brine and distilled water through blow down system and condensation respectively. Electricity is very dominant energy supply of the hospital.

Thermal Calculation for Water Cooling Tower To Cool Compressor ATLAS COPCO GA 250 FF

2019 ◽  
Vol 3 (1) ◽  
pp. 193-200
Author(s):  
Yudha Khosala
Keyword(s):  
Oil And Gas ◽  
Cooling Tower ◽  
Air Flow ◽  
Industrial Process ◽  
Cooling Capacity ◽  
Thermal Capacity ◽  
Thermal Calculation ◽  
Water Cooling ◽  
Counter Flow ◽  
Algebraic Formula

The aim of this paper is to choose the correct capacity of Thermal Calculation for Water Cooling Tower to Cool Compressor ATLAS COPCO GA 250 FF since a cooling tower is considered as an essential component for a compressor in an oil and gas pipe manufacture plant. Cooling tower is an equipment device commonly used to dissipate heat from air conditioning, water-cooled refrigeration, power generation units, and industrial process. In this paper, we use a induced draft counter flow tower for the design of cooling tower which based on Merkel’s method. The tower characteristic is determined by Merkel’s method. A simple algebraic formula is used to calculate the optimum water and air flow rate. This paper calculate the cooling tower characteristic, air flow required, efficiency, effectiveness, and cooling capacity of cooling tower need to cool the compressor compare with the availability cooling tower product in the market. In this paper, we will design based on calculation thermal capacity which lead to decentralizing the cooling tower to reach better energy efficiency of the plant.

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