Validation of Unglazed Transpired Solar Collector Assisted Air Source Heat Pump Simulation Model

Januševičius, Karolis; Streckienė, Giedrė; Bielskus, Juozas; Martinaitis, Vytautas

doi:10.1016/j.egypro.2016.09.039

Cited by 23 publications

(12 citation statements)

References 16 publications

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“…In 2015 one study [19] of a 7.4 kW variable-speed low temperature ASHP showed that for the heating mode the COP varied from 1.98 to 3.05 as the outdoor temperature changed from −7.0 • C to +5.0 • C. In this case, at the end of the heating season (heating season was assumed to begin on October 1st and end on May 21st) the total electricity consumption turned out to be 1737 kWh and the total heating output was 5927 kWh, leading to an SPF of 3.41 without taking frosting into account. Consideration of frosting in a simulation model was proven to be significant, resulting in the SPF decrease to 2.86.…”

Section: Multifamily and Public Building Installationsmentioning

confidence: 99%

“…That was the beginning of HP research in Lithuania. At the beginning of this twenty-first century, a series of different studies were conducted [5,[14][15][16][17][18][19][20][21][22], mainly due to the price increase of energy produced in conventional ways (i.e., district heating, solid fuels and natural gas). These studies were focused on the potential energy savings and environmental aspects of HPs.…”

Section: Introductionmentioning

confidence: 99%

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A Review of Heat Pump Systems and Applications in Cold Climates: Evidence from Lithuania

et al. 2019

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Similar to other cold climate countries, space heating and domestic hot water (DHW) accounts form the largest share of household energy demand in Lithuania. Heat pump technology is considered to be one of the environmentally friendly solutions to increase energy efficiency and reduce the carbon footprint of buildings. Heat pumps have been finding their way into the Lithuanian market since 2002, and currently there are many good practice examples present in the country, especially in the residential and public sectors. Heat pump use is economically advantageous in the Baltic Region, and the market share of these systems is growing. Studies have reported seasonal performance factor (SPF) ranges within 1.8 and 5.6. The lower SPF values are typically attributable to air source heat pumps, whereas the higher efficiency is achieved by ground or water source heat pump applications. While the traditional heat pump techniques are well established in the region, there is a slow uptake of new technologies, such as solar-assisted heat pumps, absorption heat pumps and heat pumps integrated into foundations, tunnels or diaphragm walls. This paper provides a critical review of different heat pump technologies, using Lithuania as a cold climate case study to overview the market trends within the European context. Potential trends for the heat pump technology development in terms of application areas, cost-benefit predictions, as well as environmental aspects, are discussed.

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Section: Multifamily and Public Building Installationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Review of Heat Pump Systems and Applications in Cold Climates: Evidence from Lithuania

et al. 2019

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“…According to Leon and Kumar [19], solar air collectors have often been used for drying, using collectors with surfaces ranging from 90 to 1300 m 2 which have provided an air temperature between 27-70 ° C. In terms of building implementation, solar air collectors have been installed [9,12,14,18]: in external walls (such as solar façades or ventilated facades), in the roof (as a ventilated roof) or as individual systems mounted on the roof, facade or exterior of the building. Another interesting solution involves the use of solar air for heating the air or other thermal agent for heat pumps [23,24]. This way the performance coefficient of the air-towater heat pumps can be improved.…”

Section: Fig 4 Solar Collector Types [9]mentioning

confidence: 99%

Air solar collectors in building use - A review

et al. 2018

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In the current energy and environmental context it is imperative to implement systems based on renewable energy sources in order to reduce energy consumptions worldwide. Solar collectors are studied by many years and many researchers are focusing their attention in order to increase their efficiency and cost-effectiveness. Water solar collectors are often implemented for domestic hot water, heating or industrial processes and already have a place on the market. A promising system which is not yet widely known is represented by air solar collectors that could represent an efficient way to use the solar energy with a lower investment cost, a system that can be used in order to preheat the fresh air required for heating, drying, or to maintain a minimum temperature during winter. This paper presents a comprehensive literature review on air solar collectors used mainly in buildings, acting as a solar wall. Air solar collectors are roughly classified into two types: glazed and opaque. The present study comprises the solar collector classification, applications and their main parameters with a special focus on opaque solar collectors.

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“…The rate they settle down depends on the quality of the meat and the environment. Since it's not possible to change the parameters of meat, or we don't really want to change, only the properties of the environment is what we can manipulate with [1][2][3][4][5][6][7]. The properties of air, as temperature, humidity, air flow velocity, and oxygen concentration.…”

Section: Introductionmentioning

confidence: 99%

Recovering Heat from Condenser Unit Produced Refrigerant System in Food Processing Facility

Kassai

2019

Period. Polytech. Mech. Eng.

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The object of this research was to investigate of the energy performance of a national chicken slaughterhouse in order to achieve condenser heat utilization generated by the operation of the existing, refrigerant systems. The paper focuses also for the technical realization of condenser heat utilization by concept plans and payback time calculations. The utilizing heat of a cooling circle's condenser is a quite quickly returnable investment. The time of payback is around 330 days by heat utilizing for hot water preheating and also air heating.

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Validation of Unglazed Transpired Solar Collector Assisted Air Source Heat Pump Simulation Model

Cited by 23 publications

References 16 publications

A Review of Heat Pump Systems and Applications in Cold Climates: Evidence from Lithuania

A Review of Heat Pump Systems and Applications in Cold Climates: Evidence from Lithuania

Air solar collectors in building use - A review

Recovering Heat from Condenser Unit Produced Refrigerant System in Food Processing Facility

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