Study of a prototype of an advanced mechanical ventilation system with heat recovery integrated by heat pump

2016 ◽  
Vol 133 ◽  
pp. 111-121 ◽  
Author(s):  
F. Fucci ◽  
C. Perone ◽  
G. La Fianza ◽  
L. Brunetti ◽  
F. Giametta ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Heat Pump ◽  
Heat Recovery ◽  
Ventilation System

scholarly journals ANALYSIS OF THE THERMODYNAMICAL EFFICIENCY OF AN AIR HANDLING UNIT WITH A HEAT PUMP / VĖDINIMO ĮRENGINIO SU ŠILUMOS SIURBLIU TERMODINAMINIO EFEKTYVUMO TYRIMAS

2012 ◽  
Vol 5 (4) ◽  
pp. 493-498 ◽  
Author(s):  
Vytautas Martinaitis ◽  
Paulius Bareika ◽  
Violeta Misevičiūtė
Keyword(s):  
Heat Pump ◽  
Heat Recovery ◽  
Thermodynamic Potential ◽  
Energy Analysis ◽  
Ventilation System ◽  
Point Of View ◽  
Thermodynamic Efficiency ◽  
Variable Speed ◽  
Air Handling Unit ◽  
Heat Demand

This paper evaluates the seasonal thermodynamic efficiency of the air-to-air heat pump used for a heat recovery ventilation system and several modulations of compressors affecting the thermodynamic efficiency of the heat pump. A variable speed and on/off-type compressors have been selected. In order to evaluate the thermodynamic potential of the device, energy analysis has been performed. Along with modelling the operation of the air handling unit during the cold time of the year, variations in the thermodynamic efficiency or different modulation compressors have been compared. The obtained results have shown that the use of a few simple compressors causes a decrease in the seasonal parameters of the heat pump: heat generated by a condenser is 5% lower compared to the use of variable speed compressors and therefore the seasonal coefficient of the performance (COP) of the heat pump decreases by 5%. Possible improvement on the heat pump can be provided changing the compressor into variable speed or modulatory equipment, which allows adjusting to heat demand and thus increases the seasonal efficiency of the system from a thermodynamic point of view. Santrauka Straipsnyje vertinamas oras-oras šilumos siurblio, naudojamo vėdinimo sistemos šilumogrąžai, sezoninis termodinaminis naudingumas ir kelios kompresorių, turinčių įtakos termodinaminiam šilumos siurblio naudingumui, moduliacijos. Analizei pasirinkti kintamo greičio ir įjungiamo / išjungiamo tipo kompresoriai. Siekiant įvertinti įrenginio termodinaminį potencialą atliekama ekserginė analizė. Modeliuojant vėdinimo įrenginio veikimą šaltuoju metų laiku, lyginama, kaip kinta skirtingų moduliacijų kompresorių termodinaminis naudingumas. Tyrimo rezultatai rodo, kad naudojant kelis paprastus kompresorius sezoniniai šilumos siurblio parametrai krenta: kondensatoriaus atiduodamas šilumos srautas yra 5 % mažesnis, lyginant su kintamo veikimo kompresorių naudojimu, be to, 5 % sumažėja sezoninis šilumos siurblio efektyvumo koeficientas (COP). Šilumos siurblį galima tobulinti kompresorių keičiant į kintamo greičio arba moduliacinį, kuris leistų prisitaikyti prie šilumos poreikio ir tokiu būdu termodinaminiu požiūriu pagerintų sezoninį sistemos efektyvumą.

scholarly journals An Evaluation of the Performance of a Ground-to-Air Heat Exchanger in Different Ventilation Scenarios in a Single-Family Home in a Climate Characterized by Cold Winters and Hot Summers

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 105
Author(s):  
Aldona Skotnicka-Siepsiak
Keyword(s):  
Mechanical Ventilation ◽  
Energy Efficiency ◽  
Heat Exchanger ◽  
Real World ◽  
Heat Recovery ◽  
Ventilation System ◽  
Single Family ◽  
Heating And Cooling ◽  
Family Home ◽  
Cooling Loads

In the present study, the real-world performance of a ground-to-air heat exchanger (GAHE) was analyzed in the Polish climate which is characterized by warm summers and cold winters. The heat exchanger’s performance was monitored over a period of three years (2017 to 2019), and real-world conditions were compared with a Typical Meteorological Year (TMY). The aim of the study was to assess the exchanger’s energy-efficiency potential in various ventilation scenarios in a single-family home under variable real-world conditions, rather than to simply determine its heating and cooling capacity. The analyzed single-family home was a modern, single-story building with a usable floor area of 115 m2. The building’s thermal insulation and airtightness met stringent energy-efficiency standards. Energy consumption in a building equipped with a natural ventilation system was compared with three other scenarios: ventilation coupled with a GAHE, mechanical ventilation with heat recovery and a high-efficiency heat exchanger (HE), and mechanical ventilation with heat recovery coupled with a GAHE. Sensible heating and cooling loads were calculated based on standard ISO 13790:2008, and latent heating and cooling loads were also included in the energy balance. During the year, the GAHE generated around 257.6 W of heating energy per hour and 124.7 W of cooling energy per hour. Presented results can be used to select the optimal HVAC system scenarios for engineering projects as well as private investors.

scholarly journals Analysis of Mechanical Ventilation System with Heat Recovery in Renovated Apartment Buildings

2015 ◽  
Vol 72 ◽  
pp. 27-33 ◽  
Author(s):  
Edite Kamendere ◽  
Gatis Zogla ◽  
Agris Kamenders ◽  
Janis Ikaunieks ◽  
Claudio Rochas
Keyword(s):  
Mechanical Ventilation ◽  
Heat Recovery ◽  
Ventilation System ◽  
Apartment Buildings

Saving Primary Energy Consumption Through Exergy Analysis of Combine Distillation and Power Plant

2012 ◽  
Vol 9 (2) ◽  
pp. 65
Author(s):  
Alhassan Salami Tijani ◽  
Nazri Mohammed ◽  
Werner Witt
Keyword(s):  
Energy Consumption ◽  
Power Plant ◽  
Heat Pump ◽  
Heat Recovery ◽  
Energy Savings ◽  
Primary Energy ◽  
Heat Pumps ◽  
Saturated Steam ◽  
Distillation Unit ◽  
Primary Energy Consumption

Industrial heat pumps are heat-recovery systems that allow the temperature ofwaste-heat stream to be increased to a higher, more efficient temperature. Consequently, heat pumps can improve energy efficiency in industrial processes as well as energy savings when conventional passive-heat recovery is not possible. In this paper, possible ways of saving energy in the chemical industry are considered, the objective is to reduce the primary energy (such as coal) consumption of power plant. Particularly the thermodynamic analyses ofintegrating backpressure turbine ofa power plant with distillation units have been considered. Some practical examples such as conventional distillation unit and heat pump are used as a means of reducing primary energy consumption with tangible indications of energy savings. The heat pump distillation is operated via electrical power from the power plant. The exergy efficiency ofthe primary fuel is calculated for different operating range ofthe heat pump distillation. This is then compared with a conventional distillation unit that depends on saturated steam from a power plant as the source of energy. The results obtained show that heat pump distillation is an economic way to save energy if the temperaturedifference between the overhead and the bottom is small. Based on the result, the energy saved by the application of a heat pump distillation is improved compared to conventional distillation unit.

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