scholarly journals HVAC Control System Using Predicted Mean Vote Index for Energy Savings in Buildings

Buildings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 38
Author(s):  
Daniel Fernando Espejel-Blanco ◽  
José Antonio Hoyo-Montaño ◽  
Jaime Arau ◽  
Guillermo Valencia-Palomo ◽  
Abel García-Barrientos ◽  
...  
Keyword(s):  
Control System ◽  
Energy Consumption ◽  
Temperature Control ◽  
Air Conditioning ◽  
Energy Savings ◽  
Sensor Nodes ◽  
Temperature Control System ◽  
Raspberry Pi ◽  
Predicted Mean Vote ◽  
The Coordinator

Nowadays, reducing energy consumption is the fastest way to reduce the use of fossil fuels and, therefore, greenhouse gas emissions. Heating, Ventilation, and Air Conditioning (HVAC) systems are used to maintain an indoor environment in comfortable conditions for its occupants. The combination of these two factors, energy efficiency and comfort, is a considerable challenge for building operations. This paper introduces a design approach to control an HVAC, focused on an energy consumption reduction in the operation of the HVAC system of a building. The architecture was developed using a Raspberry Pi as a coordinator node and wireless connection with sensor nodes for environmental variables and electrical measurement nodes. The data received by the coordinator node is sent to the cloud for storage and further processing. The control system manages the setpoint of the HVAC equipment, as well as the turning on and off the HVAC compressor using an XBee-based solid state relay. The HVAC temperature control system is based on the Predicted Mean Vote (PMV) index calculation, which is used by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to find the appropriate setpoint to meet the thermal comfort of 80% of users. This method combines the values of humidity and temperature to define comfort zones. The coordinator node makes the compressor control decisions depending on the value obtained in the PMV index. The proposed PMV-based temperature control system for the HVAC equipment achieves energy savings ranging from 33% to 44% against the built-in control of the HVAC equipment, when operating with the same setpoint of 26.5 grades centigrade.

scholarly journals Pengkondisian Udara Secara Otomatis Pada Proses Pasteurisasi Kumbung Jamur Merang Menggunakan ATMEGA8535

2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Wardika Wardika ◽  
Karsid Karsid
Keyword(s):  
Control System ◽  
Lower Limit ◽  
Temperature Control ◽  
Air Conditioning ◽  
Temperature Control System ◽  
Air Conditioning System ◽  
Time Required

In this research designed an air conditioning system that is capable of reaching temperatures needed in the pasteurization process in miniature kumbung. The temperature required is approximately 70-80oC. The temperature was maintained for 4 hours. To maintain at that temperature control system designed 'on-off' by using a microcontroller ATMega 8535. This system works by shutting down the system when the temperature has been reached and revive the system when the temperature has dropped to the lower limit temperature setpoint. The results of this research in terms of the time required for the pasteurization process kumbung automatic mushroom faster at less than 5 hours compared kumbung regular mushrooms is 7-8 hours.

scholarly journals Reduce energy consumption using efficient temperature Control inside building

2020 ◽  
Vol 170 ◽  
pp. 01013
Author(s):  
Subbarao Yarramsetty ◽  
Divyesh Sharma ◽  
MVN Siva Kumar
Keyword(s):  
Climate Change ◽  
Control System ◽  
Energy Consumption ◽  
Automatic Control ◽  
Temperature Control ◽  
Questionnaire Survey ◽  
Indoor Environment ◽  
Temperature Control System ◽  
Reduce Energy Consumption ◽  
Energy Consumptions

One of the biggest problems we have in front of us today is climate change. However, this problem can be solved if we can take right steps individually. One of the major steps which can be taken is to reduce energy consumptions in the houses by automatic control of ACs according to users’ comfort which will help in energy consumption. It is observed that a huge difference can be created by using automated temperature control system in respect to energy consumption. This paper contains study of indoor environment of the rooms in 1.8K Hostel and classrooms of Department of Civil Engineering in the Campus of NIT WARANGAL is done to analyse the comfort temperature inside the rooms for the efficient use of energy. Questionnaire survey-based study was adopted for this paper to analyse the range of thermal comfort of the students.

The Application of Radiant Concrete Ceiling’s Heat Storage in Wu Han, China

2011 ◽  
Vol 374-377 ◽  
pp. 847-850
Author(s):  
Na Li ◽  
Dong Li Yuan
Keyword(s):  
Control System ◽  
Cost Saving ◽  
Energy Saving ◽  
Temperature Control ◽  
Air Conditioning ◽  
Heat Storage ◽  
Operating Cost ◽  
Electricity Price ◽  
Temperature Control System ◽  
Intermittent Operation

In temperature and humidity independent control system, although the heat storage capability of the concrete ceiling is not big, for energy-saving building with small air-conditioning load, its potential of operating cost’ saving is not negligible. Based on an energy-saving dwelling building’s typical room in Wu Han, China, this paper dynamically analyzes the room’s load and concrete ceiling’s radiating capability, get conclusion that: according to the peak-valley electricity price and reasonable intermittent operation strategy, the temperature control system can save cost by 16.6% in summer, 27.3% in winter.

Temperature Control System of Annealing Furnace Based on Smart Meters and PC

2011 ◽  
Vol 130-134 ◽  
pp. 3518-3521
Author(s):  
Yan Wang ◽  
Bin Lu
Keyword(s):  
Control System ◽  
Energy Consumption ◽  
Temperature Control ◽  
Production Quality ◽  
Temperature Control System ◽  
Annealing Furnace ◽  
Smart Meters ◽  
Stable Production ◽  
Process Operation ◽  
Increasing Demand

With the requirements of larger production process and continuous reheating annealing furnace production, quality and the optimization of the energy consumption constantly increasing demand, industrial annealing furnace burning process precise temperature control is particularly important [1]. The working state of the heating annealing furnace will directly affect the process operation and sequence. Combining with the actual requirements of the project an axle, we use the smart and PC temperature control to achieve economic efficient and stable production purpose.

Temperature Control System for Transformer Three-Phase 50 Hz 2500 kVA

2017 ◽  
Vol 3 (2) ◽  
pp. 88
Author(s):  
Suci Rahmatia ◽  
Marsah Zaysi Makhudzia
Keyword(s):  
Optimal Control ◽  
Control System ◽  
Heat Loss ◽  
Temperature Control ◽  
Electrical Energy ◽  
Temperature Control System ◽  
Iron Core ◽  
Electrical Device ◽  
Optimal Control System ◽  
Three Phase

<p><em>Abstrak <strong>- </strong></em><strong>Transformator adalah peralatan listrik yang sangat vital dalam proses pembangkitan maupun transmisi energi listrik karena transformator dapat menaikkan atau menurunkan tegangan. Pada proses menaikkan dan menurunkan tegangan biasanya sering timbul panas akibat rugi – rugi tembaga pada inti besi dan kumparannya sehingga pada kondisi overload akan menimbulkan pemanasan yang berlebih dan dapat mempengaruhi kinerja transformator. Oleh karena itu dibuat sistem kontrol temperatur pada transformer yang dapat mengontrol temperatur di dalam transformator saat bekerja pada kondisi overload, sehigga transformatornya tidak terbakar. Dial thermometer digunakan sebagai alat yang mengontrol temperatur transformator pada sistem kontrol temperatur. Agar mendapatkan sistem kontrol yang optimal, maka setting temperatur pada dial thermometer di sesuaikan dengan temperatur maksimal tranformator dapat bekerja. Sehingga pada saat temperatur tertentu dial thermometer dapat memberikan sinyal untuk membunyikan alarm dan mengaktifkan kontrol kipas sehingga kipas dapat bekerja menurunkan temperatur transformator.<em></em></strong></p><p><strong><em> </em></strong></p><p><strong><em>Kata kunci - </em></strong><em>transformator, rugi – rugi tembaga, temperatur, sistem kontrol, dial thermometer<strong>.</strong></em></p><p><strong><em> </em></strong></p><p><em>Abstract <strong>- </strong></em><strong>A transformer is an electrical device that is vital in the generation and transmission of electrical energy because the transformer can raise (stepping up) or lower (stepping down) the voltage. In the process of raising and lowering the voltage is usually often caused heat loss of copper in iron core and coil so that the overload condition will cause excessive warming and can affect the performance of the transformer. Therefore, a temperature control system on the transformer can control the temperature inside the transformer while working under overload conditions, so the transformer is not burned. Dial thermometer is used as a device that controls the temperature of the transformer in the temperature control system. In order to obtain an optimal control system, the temperature setting on the dial thermometer adjusted to the maximum transformer temperature can work. So that when a certain temperature dial thermometer can provide a signal to sound the alarm and activate the fan control so that the fan can work down the transformer temperature.</strong></p><p><strong> </strong></p><p><strong><em>Keywords -  </em></strong><em>transformator, loss of copper, themperature, control system, dial thermometer<strong></strong></em></p>

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