Influence of Cooling and Heating Systems on Pen Fouling, Lying Behavior, and Performance of Rearing Piglets

The rearing of piglets is a demanding phase of pig production partly because of the changing temperature requirements of the piglets during rearing. Piglets need high temperatures in the resting area, especially at the beginning, while the optimal temperature is lower toward the end of rearing. To meet the changing temperature demands of the piglets and also to optimize the pen structure, one floor cooling and two heating systems were examined in this study. In two rearing compartments, four pens with 48 piglets each were equipped with a heated cover above a heated/cooled lying area. The lying behavior and performance of 1152 piglets, in addition to the pen fouling, were recorded over six rearing periods. There was no difference between the two heating systems in the lying behavior. However, the acceptance of the lying area was very high in all pens and periods with heating. The cooling had a significant influence on the lying behavior depending on the rearing week. Significantly more piglets lay on the cooled lying area compared with the control pen during the last weeks. The fouling of the pens was not affected by the cooling or heating systems; however, the fouling in all pens was very low. The tested pen structure in combination with a heating and cooling system is a well-functioning way of integrating a solid lying area.

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Design and performance of a solar-powered heating and cooling system using silica gel/water adsorption chiller

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2008.10.021 ◽

2009 ◽

Vol 29 (10) ◽

pp. 2100-2105 ◽

Cited By ~ 64

Author(s):

W.-S. Chang ◽

C.-C. Wang ◽

C.-C. Shieh

Keyword(s):

Silica Gel ◽

Water Adsorption ◽

Cooling System ◽

Adsorption Chiller ◽

Heating And Cooling ◽

And Performance ◽

Solar Powered

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Design, fabrication and performance test of heating and cooling system of JT-60 vacuum vessel.

Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan ◽

10.3327/jaesj.29.1108 ◽

1987 ◽

Vol 29 (12) ◽

pp. 1108-1115

Author(s):

Masatsugu SHIMIZU ◽

Tohru SHIMIZU ◽

Noboru AKINO ◽

Masahiro YAMAMOTO ◽

Hideyuki TAKATSU ◽

...

Keyword(s):

Performance Test ◽

Cooling System ◽

Vacuum Vessel ◽

Heating And Cooling ◽

And Performance

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Mathematical modeling and performance analysis of an integrated solar heating and cooling system driven by parabolic trough collector and double-effect absorption chiller

Energy and Buildings ◽

10.1016/j.enbuild.2019.109400 ◽

2019 ◽

Vol 202 ◽

pp. 109400 ◽

Cited By ~ 6

Author(s):

Xuejing Zheng ◽

Rui Shi ◽

Yaran Wang ◽

Shijun You ◽

Huan Zhang ◽

...

Keyword(s):

Mathematical Modeling ◽

Performance Analysis ◽

Cooling System ◽

Double Effect ◽

Solar Heating ◽

Parabolic Trough ◽

Absorption Chiller ◽

Parabolic Trough Collector ◽

Heating And Cooling ◽

And Performance

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Operation and Performance Assessment of a Hybrid Solar Heating and Cooling System for Different Configurations and Climatic Conditions

Energies ◽

10.3390/en14041142 ◽

2021 ◽

Vol 14 (4) ◽

pp. 1142

Author(s):

Rafał Figaj ◽

Maciej Żołądek

Keyword(s):

Cooling System ◽

Economic Assessment ◽

Heat Pumps ◽

Climatic Conditions ◽

Solar Heating ◽

Climate Type ◽

Adsorption Chiller ◽

Heating And Cooling ◽

Space Cooling ◽

And Performance

Energy needs of air conditioning systems are constantly growing worldwide, due to climate change and growing standards of buildings. Among the possible systems, solar heating and cooling based on reversible heat pumps and thermally driven chillers are a viable option for ensuring space heating and cooling for different users. The high installation costs are a limit to their diffusion, however, under specific circumstances (climate, type of the building, type of the user, etc.), the investment in this technology can be profitable in a long term. The presented paper describes an energy-economic assessment of a solar heating and cooling system integrating a solar dish concentrator with thermal collectors coupled with a reversible heat pump and an absorption or adsorption chiller. The system integrated with a household building is developed and dynamically simulated in the Transient System Simulation (TRNSYS) environment under different circumstances –adoption of absorption or adsorption chiller, use of auxiliary thermal energy to drive the sorption chillers, and locality. The results show that space cooling demand in Cracow is matched by solar energy, in a range between 49.0 and 97.6%, while for Naples the space cooling demand is provided by solar heat from 46.1 to 99.1% depending on the adopted sorption chiller and or the use of auxiliary heat for a natural gas boiler. The proposed system is not profitable in case Cracow, since a Simple Pay Back period of about 20 years is achieved. Conversely, case of Naples, the same index achieves a value between 8 and 12 years showing that the proposed system may be a viable solution for heating and cooling installation.

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AN ASSESSMENT RESEARCH FOR RADIANT HEATING AND COOLING SYSTEM DESIGN : (1) Warm-up characteristics in floor heating systems

Journal of Architecture and Planning (Transactions of AIJ) ◽

10.3130/aija.60.11_2 ◽

1995 ◽

Vol 60 (470) ◽

pp. 11-17 ◽

Cited By ~ 2

Author(s):

Hisaya ISHINO ◽

Kimiko KOHRI

Keyword(s):

System Design ◽

Cooling System ◽

Radiant Heating ◽

Warm Up ◽

Heating Systems ◽

Heating And Cooling ◽

Floor Heating ◽

Assessment Research

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Gamification for heating systems

10.33774/miir-2021-x6z82 ◽

2021 ◽

Author(s):

Melanie Beckerleg ◽

Mateusz Kamienk ◽

Maryia Shpak ◽

Bozena Staruck

Keyword(s):

Energy Efficiency ◽

Thermal Comfort ◽

Cooling System ◽

Environmental Awareness ◽

User Feedback ◽

Heating Systems ◽

Heating And Cooling

The report is concerned with design of gamification model that would collect user feedback for use in heating and cooling system. The main incentive to the participants is energy efficiency resulting in smaller bills, however the model should consider a few other elements. There are different preferences of thermal comfort in apartments, financial goals and environmental awareness among apartment owners. Gamification model is not focused on one goal, e.g. energy efficiency, rather should reward being interactive and willingness to support preferences set by majority in the community.

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Sizing and performance analyses of a combined heating and cooling system with the integration of short- and long-term storages

E3S Web of Conferences ◽

10.1051/e3sconf/202124607004 ◽

2021 ◽

Vol 246 ◽

pp. 07004

Author(s):

Mohammad Shakerin ◽

Vilde Eikeskog ◽

Yantong Li ◽

Harsem T. Thorgeir ◽

Natasa Nord

Keyword(s):

Heat Pump ◽

Cooling System ◽

Renewable Energy Sources ◽

Energy System ◽

Energy Sources ◽

Heating And Cooling ◽

Short And Long Term ◽

Performance Analyses ◽

And Performance

Technological advancements in the utilization of renewable energy sources have unveiled potentials for increasing building energy efficiency. Integrating heat pump-based energy systems with thermal storages is a suitable option to meet the thermal requirements of modern buildings and exploiting the available renewable energy sources. However, how to size the main components of a heat pump-based energy system with the integration of short- and long-term storages is not yet well explored. Therefore, this study focused on the design and performance analyses of an integrated heating and cooling system consist of a heat pump, borehole long-term thermal storage, and hot water tank short-term thermal. Heat pump models were introduced as parametric models based on the producer data. The dynamic thermal model of the energy system was developed and analysed in MATLAB. Different combinations of heating and cooling loads were tested. Integration of cooling and heating systems was discussed through different operation strategies and challenges were addressed. The results of the parametric analysis identified the key parameters affecting the design of components and efficiency of the system. Moreover, the results showed that lower cooling to heating load ratio leads to an excessive reduction of the ground temperature and overall efficiency over the long-term operation.

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Two-Bar Thermal Ratcheting for Alloy 617—Part II: Ratcheting Results

Journal of Pressure Vessel Technology ◽

10.1115/1.4028476 ◽

2015 ◽

Vol 137 (3) ◽

Cited By ~ 2

Author(s):

Yanli Wang ◽

T.-L. Sham ◽

R. I. Jetter

Keyword(s):

High Temperatures ◽

Time Delays ◽

Alloy 617 ◽

Design Rules ◽

Testing Conditions ◽

Heating And Cooling ◽

Thermal Ratcheting ◽

Thermal Histories ◽

Very High ◽

Mean Stresses

This is Part II of a study on two-bar thermal ratcheting for Alloy 617. The ratcheting strains were evaluated for conditions with the same temperature range but with different mean stresses, heating and cooling rates, time delays, and thermal histories. These testing conditions were designed to be closely aligned to the development of design rules for strain limits at very high temperatures for Alloy 617. These new design rules have been formulated to address the fact that the effects of plastic deformation and creep deformation on the ratcheting strains are not separable at very high temperatures for this alloy.

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