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Dolaana Khovalyg

Cette personne a quitté l’EPFL

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Publications associées (71)

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Critical review of standards for indoor thermal environment and air quality

Dolaana Khovalyg

Quality of the indoor environment has become an important parameter to account for in new and existing buildings due to the increasing number of people spending most of their time indoors. Generally, the design and evaluation of indoor environments in buil ...

2020

Measuring the effective thermal resistance of ventilated air-spaces behind common wall assemblies: Theoretical uncertainty analysis and recommendations for the hot box method modifications (ASHRAE 1759-RP)

Dolaana Khovalyg, Mohammad Rahiminejad

A well-designed ventilated wall that incorporates air-space behind cladding can reduce energy use for conditioning buildings by adding a thermally resistive layer. The scarcity of thermal performance data and standardized test methods is a particular barri ...

2022

Reinforcement learning for occupant-centric operation of residential energy system

François Maréchal, Dolaana Khovalyg, Amirreza Heidari

Occupant behavior is a highly stochastic phenomenon, which is known as a key challenge for the optimal control of residential energy systems. With the increasing share of renewable energy in the building sector, the volatile nature of renewable energy is a ...

TU Delft2022

An occupant-centric control framework for balancing comfort, energy use and hygiene in hot water systems: A model-free reinforcement learning approach

François Maréchal, Dolaana Khovalyg, Amirreza Heidari

Occupants' behavior is a major source of uncertainty for the optimal operation of building energy systems. The highly stochastic hot water use behavior of occupants has led to conservative operational strategies for hot water systems, that try to ensure oc ...

2022

Personalised environmental Control Systems (PECS) usage thresholds: a dynamic simulation approach to assess energy, cost, and emissions saving

Dolaana Khovalyg

Personalised Environmental Control Systems (PECS) have emerged as a solution to customise thermal conditions at individual workstations, potentially reducing overall energy consumption. However, their energy performance under diverse building operating con ...

2025

Environmental preferences of occupants: A multi-domain approach in the Swiss open office case study

Marilyne Andersen, Jan Wienold, Dolaana Khovalyg, Dusan Licina, Caroline Karmann, Verena Marie Barthelmes, Arnab Chatterjee

Defining indoor environmental conditions that meet the needs and preferences of occupants in open space offices can be challenging since the same space might be occupied by people with different individual needs and preferences regarding what constitutes a ...

IOP Science2021

Thermal resistance of ventilated air-spaces behind external claddings; definitions and challenges (ASHRAE 1759-RP)

Dolaana Khovalyg, Mohammad Rahiminejad

The presence of an air-space within a building envelope is known to have a varying contribution to the overall thermal performance of the wall assembly due to the combined effect of convection and radiation in the air cavity. In particular, the thermal res ...

2021

Prefabricated thermally-activated fiber-polymer composite building slab P-TACS: Toward the multifunctional and pre-fabricated structural elements in buildings

Thomas Keller, Dolaana Khovalyg

The traditional sequential design of building elements, where every element performs only one dedicated function, carries significant embodied energy. Thus, modular pre-fabricated load-bearing elements could overcome the disadvantages of the current carbon ...

SAGE PUBLICATIONS LTD2023

An adaptive control framework based on Reinforcement learning to balance energy, comfort and hygiene in heat pump water heating systems

François Maréchal, Dolaana Khovalyg, Amirreza Heidari

A major challenge in the operation of water heating systems lies in the highly stochastic nature of occupant behavior in hot water use, which varies over di,erent buildings and can change over the time. However, the current operational strategies of water ...

IOP PUBLISHING LTD2021

Heat recovery potential from ventilated passive and active facades

Dolaana Khovalyg, Mohammad Rahiminejad

A ventilated air-space behind external claddings can potentially affect the thermal performance of the entire building structure. In particular, in the Building Integrated Photovoltaic (BIPV) facades, ventilated cavities are typically present between the P ...

TU Delft OPEN2022

Thermoregulation of Tuvan pastoralists and Western Europeans during cold exposure

Dolaana Khovalyg

ObjectivesThis study compared the metabolic and vascular responses, to whole-body and finger cold exposure, of a traditional population lifelong exposed to extreme cold winters with Western Europeans. MethodsThirteen cold acclimatized Tuvan pastoralist adu ...

WILEY2023

Numerical and experimental study of the dynamic thermal resistance of ventilated air-spaces behind passive and active façades

Dolaana Khovalyg, Mohammad Rahiminejad

The variation of the thermo-hydrodynamic behavior of the airflow in the ventilated cavity behind external claddings in a wall structure could potentially affect the overall thermal resistance of the entire structure. Although the impact of an enclosed air- ...

2022

Modeling local thermal responses of individuals: Validation of advanced human thermo-physiology models

Dolaana Khovalyg, Mohamad Rida

Human thermo-physiology models (HTPM) are useful tools to assess dynamic and non-uniform human thermal states. However, they are developed based on the physiological data of an average person. In this paper, we present a detailed evaluation of two sophisti ...

2023

Exploring easy-implementable adaptation strategies to climate change scenarios of existing office buildings: a case study in the Swiss context

Dolaana Khovalyg, Sergi Aguacil Moreno, Verena Marie Barthelmes, Cecile Anne Berquand

European energy policies are aimed at increasing the climate resilience of infrastructure, including new and existing buildings. The implications of future ambient conditions on the energy and environmental performance in buildings and respective adaptatio ...

2021

Inter- and intra-individual variability in CO2 production and metabolic rate

Dolaana Khovalyg, Mohamad Rida

Carbon dioxide generated by the human body and exhaled (VCO2) is commonly used for ventilation controls, while the metabolic rate (i.e., energy expenditure EE) is an important parameter defining human thermal comfort in buildings. These two parameters are ...

2023

DeepValve: Development and experimental testing of a Reinforcement Learning control framework for occupant-centric heating in offices

Dolaana Khovalyg, Amirreza Heidari

Space heating controls in offices usually follow static schedules detached from actual occupancy, which results in energy waste by unnecessarily heating vacant offices. The uniqueness of stochastic occupancy profile and thermal response time of each office ...

2023

Towards multifunctional building elements: thermal activation of a composite interior GFRP slab

Thomas Keller, Dolaana Khovalyg, Madeline Pugin

Modular multifunctional building elements can overcome major disadvantages of the traditional sequential design and become prospective design solutions for sustainable construction. Thus, this work explores lightweight glass fiber-reinforced polymer (GFRP) ...

IOP Science2021

Impact of the Ventilated Cavity on the Thermal Performance of Traditional Wall Structures

Dolaana Khovalyg, Mohammad Rahiminejad

The amount of heat flux passing through the building envelope directly affects the energy use for the thermal conditioning of the building. The ventilated cavity behind the traditional external claddings (e.g., vinyl siding, brick veneer) adjacent to the w ...

AMER SOC HEATING, REFRIGERATING AND AIR-CONDITIONING ENGS2021

Variation in Indoor Thermal Environmental Parameters in an Open Space Office

Dolaana Khovalyg, Verena Marie Barthelmes, Arnab Chatterjee

Building energy modelling is an indispensable component of today’s design method. However, as per research findings, real-life buildings could utilize almost twice the amount of their ideal energy performance. Thus, it is important to understand the variat ...

TU Delft2022

In-situ measurements of the U-value of a ventilated wall assembly

Dolaana Khovalyg, Mohammad Rahiminejad

The walls in a building envelope have the largest contact area with the exterior environment, and, therefore, a considerable portion of the thermal energy can be lost through the walls compared to the other parts of the building envelope. For energy-saving ...

2021