scholarly journals Modelling challenges of a heat recovery VRF system in a cold climate using a sustainable office case study building

2021 ◽  
Author(s):  
Cassandra Kani-Sanchez
Keyword(s):  
Model Calibration ◽  
Heat Recovery ◽  
Hvac Systems ◽  
Cold Climate ◽  
Office Building ◽  
System Model ◽  
System Efficiency ◽  
Climate Variations ◽  
Terminal Unit

There is a need to better understand the performance characteristics of HR VRF systems in a cold climate. This study involved the development of a HR VRF system model in EnergyPlus, using field data from a two-storey case study office building. Using the model, this study investigated calibration with site information, climate variations, VRF indoor terminal unit reconfiguration for heat recovery improvements, right-sizing HR VRF outdoor units to raise part-load ratios, and comparing the HR VRF system to other HVAC systems for system efficiency. Challenges with achieving model calibration led to recommendations for monitoring system design and EnergyPlus modelling improvements.

scholarly journals Modelling challenges of a heat recovery VRF system in a cold climate using a sustainable office case study building

2021 ◽  
Author(s):  
Cassandra Kani-Sanchez
Keyword(s):  
Model Calibration ◽  
Heat Recovery ◽  
Hvac Systems ◽  
Cold Climate ◽  
Office Building ◽  
System Model ◽  
System Efficiency ◽  
Climate Variations ◽  
Terminal Unit

There is a need to better understand the performance characteristics of HR VRF systems in a cold climate. This study involved the development of a HR VRF system model in EnergyPlus, using field data from a two-storey case study office building. Using the model, this study investigated calibration with site information, climate variations, VRF indoor terminal unit reconfiguration for heat recovery improvements, right-sizing HR VRF outdoor units to raise part-load ratios, and comparing the HR VRF system to other HVAC systems for system efficiency. Challenges with achieving model calibration led to recommendations for monitoring system design and EnergyPlus modelling improvements.

scholarly journals Analysis of selected input data impact on energy demand in office building - case study

2018 ◽  
Vol 222 ◽  
pp. 01015 ◽  
Author(s):  
Joanna Sinacka ◽  
Katarzyna Ratajczak
Keyword(s):  
Shape Factor ◽  
Energy Demand ◽  
Heat Recovery ◽  
Input Data ◽  
Internal Heat ◽  
Office Building ◽  
Passive House ◽  
Energy Calculations ◽  
Air Tightness

In the building designing process special attention should be paid to energy calculations - with analysis of different input data low energy or passive house can be obtained and decision of which parameters can or cannot be changed may be made. The following input data was analysed: shape factor A/V, glazed area, internal heat gains, air tightness, efficiency of heat recovery. The results show that the input data for the energy calculations are crucial for the obtained result.

scholarly journals Performance Diagnosis and Energy-Saving Optimization of the Heat Recovery Unit in An Office Building in Sichuan

2019 ◽  
Vol 136 ◽  
pp. 01047
Author(s):  
Baowei Xu ◽  
Nan Li ◽  
Xinghua Li
Keyword(s):  
Energy Saving ◽  
Air Temperature ◽  
Heat Recovery ◽  
Hvac Systems ◽  
Sichuan Province ◽  
Office Building ◽  
Working Capacity ◽  
Public Buildings ◽  
Performance Diagnosis ◽  
Recovery Unit

In recent years, the number and volume of public buildings have been increasing sharply, which has led to an increase in the working capacity of HVAC systems in public buildings. This paper analyzes and tests a heat recovery unit in an office building in Sichuan Province, China. The fresh air input temperature, the fresh air output temperature and the exhaust air temperature of the heat recovery unit in January in 2018 are analyzed. The positive and negative benefits are calculated, and thus the energy saved by the system during the test is obtained.

PERSIAN GARDENS IN COLD AND DRY CLIMATE: A CASE STUDY OF TABRIZ’S HISTORICAL GARDENS

2016 ◽  
Vol 10 (3) ◽  
pp. 193
Author(s):  
Ahad Nejad Ebrahimi ◽  
Farnaz Nazarzadeh ◽  
Elnaz Nazarzadeh
Keyword(s):  
Comparative Study ◽  
Water Supply ◽  
Field Study ◽  
Cold Climate ◽  
Natural Substrate ◽  
Garden Design ◽  
Climate Conditions ◽  
North West ◽  
Special Expertise

Throughout history, gardens and garden designing has been in the attention of Persian architects who had special expertise in the construction of gardens. The appearance of Islam and allegories of paradise taken from that in Koran and Saints’ sayings gave spirituality to garden construction. Climate conditions have also had an important role in this respect but little research has been done about it and most of the investigations have referred to spiritual aspects and forms of garden. The cold and dry climate that has enveloped parts of West and North West of Iran has many gardens with different forms and functions, which have not been paid much attention to by studies done so far. The aim of this paper is to identify the features and specifications of cold and dry climate gardens with an emphasis on Tabriz’s Gardens.  Due to its natural and strategic situation, Tabriz has always been in the attention of governments throughout history; travellers and tourists have mentioned Tabriz as a city that has beautiful gardens. But, the earthquakes and wars have left no remains of those beautiful gardens. This investigation, by a comparative study of the climates in Iran and the effect of those climates on the formation of gardens and garden design, tries to identify the features and characteristics of gardens in cold and dry climate. The method of study is interpretive-historical on the basis of written documents and historic features and field study of existing gardens in this climate. The results show that, with respect to natural substrate, vegetation, the form of water supply, and the general form of the garden; gardens in dry and cold climate are different from gardens in other climates.

Maximum Heat Recovery And Utilization System In A Municipal Activated Sludge Fluidized Bed Incineration (FBI) Plant : A Case Study For Bursa, Turkey

2016 ◽  
Vol 2016 (9) ◽  
pp. 174-184
Author(s):  
Ercument Aktuz ◽  
John Yu ◽  
Bilge Alpaslan Kocamemi ◽  
Talat Ozen ◽  
Devrim İzgi ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Fluidized Bed ◽  
Heat Recovery ◽  
Maximum Heat ◽  
Fluidized Bed Incineration

scholarly journals Detailed Cross Comparison of Building Energy Simulation Tools Results using a reference office building as a case study

2021 ◽  
pp. 111260
Author(s):  
Mara Magni ◽  
Fabian Ochs ◽  
Samuel de Vries ◽  
Alessandro Maccarini ◽  
Ferdinand Sigg
Keyword(s):  
Building Energy ◽  
Energy Simulation ◽  
Office Building ◽  
Building Energy Simulation ◽  
Simulation Tools

scholarly journals Barriers on Establishing Passive Strategies in Office Spaces: A Case Study in a Historic University Building

2021 ◽  
Vol 13 (8) ◽  
pp. 4563
Author(s):  
Nuno Baía Baía Saraiva ◽  
Luisa Dias Dias Pereira ◽  
Adélio Rodrigues Gaspar ◽  
José Joaquim da Costa
Keyword(s):  
Thermal Comfort ◽  
Indoor Environment ◽  
Hvac Systems ◽  
Heritage Buildings ◽  
Full Capacity ◽  
Free Cooling ◽  
Passive Strategies ◽  
The University ◽  
Indoor Conditions

The adaptation of spaces to different usage typologies can be complex in heritage buildings. Facilities were initially planned for a specific type of use that, when changed, require additional measures to ensure a suitable indoor environment. Passive strategies—e.g., free cooling—are commonly used as an alternative without requiring equipment installation. However, its implementation often leads to unsatisfactory conditions. Therefore, it is important to clarify the main barriers to achieving thermal comfort in readapted historic buildings. The present work investigates the thermal comfort conditions reported by workers in office spaces of a historic building in the University of Coimbra. A monitoring campaign was carried out between May and September 2020 to assess indoor conditions’ quality. Due to the current pandemic of COVID-19, offices were not occupied at full capacity. A one-day evaluation of thermal comfort was made using a climate analyzer and six occupants were surveyed on 19 August 2020. The main results highlighted discomfort due to overheating of spaces. The causes were related to the combination of inadequate implementation of the free cooling actions and the building use. Furthermore, it was recommended the installation of HVAC systems in case of full capacity.

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