Exhaust air heat pump connection schemes and balanced heat recovery ventilation effect on district heat energy use and return temperature

Thalfeldt, Martin; Kurnitski, Jarek; Latõšov, Eduard

doi:10.1016/j.applthermaleng.2017.09.033

Cited by 27 publications

(12 citation statements)

References 28 publications

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“…A standard 5-storey precast concrete building extensively manufactured during the period of 1960−1990 was used for this study. The building model, building data and modelling results for HRV (Option 1) and EAHP (Option 2)-based renovation packages are similar to the results presented in the previous research paper [20], where a dynamic simulation model IDA-ICE 4.7 [23] was used. For model simplifying a multiplier 3 was used for middle floor zones.…”

Section: Consumersmentioning

confidence: 57%

The Impact of Parallel Energy Consumption on the District Heating Networks

Latõšov

Volkova

Siirde

et al. 2019

Environmental and Climate Technologies

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The aim of this study is to evaluate and compare the impacts of heat recovery ventilation (HRV) and exhaust air heat pump (EAHP)-based solutions used in renovated buildings, which make it possible to reach performance class C in district heating (DH) area CO2 emissions, primary energy consumption and total energy costs for consumers. Evaluation is based on the methodology presented in the previous research paper [1]. Calculation results show that the use of EAHP has a negative impact on DH sustainability (heat losses in the DH network, DH heat price, reduced consumption of DH heat) and CO2 emissions related to energy delivery (heat and electricity) to consumers in the DH area. Positive aspects of the EAHP use include the fact that almost the same primary energy consumption level can be achieved with lesser (up to 7 %) annual costs (annual capital costs, DH heat costs and electricity costs) and lower initial investments (about 10 %). At the same time, every renovated building with EAHP will experience a negative impact on heat prices. In DH areas where almost all buildings are renovated with EAHP, cost savings are not as evident compared to buildings with HRV in DH areas where the use of parallel consumption solutions (EAHP) is minimized. It is reasonable to promote these renovation packages and solutions that benefit the building’s primary energy reduction, and also do not increase electric energy consumption (additional electric power generators are needed) and do not damage DH networks.

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Section: Consumersmentioning

confidence: 57%

The Impact of Parallel Energy Consumption on the District Heating Networks

Latõšov

Volkova

Siirde

et al. 2019

Environmental and Climate Technologies

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“…Thalfeldt et al [13] has investigated the two main methods to ensure good air quality and energy efficiency in renovated apartments in cold climate. The two methods are mechanical supply and exhaust ventilation with heat recovery (HRV) and exhaust air heat pump (EAHP).…”

Section: Typical Capital Cost (£)mentioning

confidence: 99%

Air-to-air heat pump: review of recent advances and future potential

2019

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As the demand for energy is increasing and due to more focus on the utilization of low impact energy heat sources, heat pumps are a renewable energy technology that transfers thermal energy from one place to another. Heat pumps are used in various applications such as space heating, space cooling, heating water and many others. Heat pumps have many configurations but in essence they compose of components which are found in all units. The framework for 2030 climate and energy policy has decided that greenhouse emissions must be reduced by 40%. This has therefore, increased the need to utilize low grade energy. Heat pumps have the capability to utilize the upgrade of low grade energy and reuse it within any domestic and industrial application. This paper will explain the working principle of an air-to-air heat pump, describing the different configurations, and evaluate the performance of such systems.

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“…User (building) model can be performed by using different software like EnergyPlus, eQUEST, ESP-r, DeST [9]- [13]. One of the modelling examples can be found in [7] where typical 5-story large panel apartment building from the period 1960-1980 was chosen to do energy simulations with dynamic simulation model IDA-ICE 4.7.…”

Section: Basic Dh Area Conditionsmentioning

confidence: 99%

“…Mentioned researches were focused on the heat demand reduction aspects. Heat demand reduction in DH system is one of the main risks to DH sustainability, caused by parallel consumption and it can lead to numerous problems, such as: − The share of network losses in total heat output increases, since the heat supplier has to ensure that the temperature and flow rates of the DH are as intended [7]. It causes the rise of heat distribution costs [8].…”

Section: Introductionmentioning

confidence: 99%

“…And furthermore there are other possible negative impacts of parallel consumption on DH. Detailed list of possible impacts is presented below: − Efficiency of CHP, producing heat in DH, can be reduced, because of the decrease in the production of flue gas condensers and the decrease in the electrical efficiency factor of the CHP heat plants [7];…”

Section: Introductionmentioning

confidence: 99%

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Methodological Approach to Determining the Effect of Parallel Energy Consumption on District Heating System

Latõšov

Volkova

Siirde

et al. 2017

Environmental and Climate Technologies

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. Article 2 section 2 of the same Directive states that the energy used in nearly zero-energy buildings should be created covered to a very significant extent by energy from renewable sources, including energy from renewable sources produced on-site or nearby. Thus, the heat distributed by DH systems and produced by manufacturing devices located in close vicinity of the building also have to be taken into account in determining the energy consumption of the building and the share of renewable energy used in the nearly zero-energy buildings. With regard to the spreading of nearly zero-energy and zero-energy houses, the feasibility of on-site energy (heat and/or electricity) production and consumption in DH areas energy (i.e. parallel consumption, when the consumer, connected to DH system, consumes energy for heat production from other sources besides the DH system as well) needs to be examined. In order to do that, it is necessary to implement a versatile methodological approach based on the principles discussed in this article.

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Exhaust air heat pump connection schemes and balanced heat recovery ventilation effect on district heat energy use and return temperature

Cited by 27 publications

References 28 publications

The Impact of Parallel Energy Consumption on the District Heating Networks

The Impact of Parallel Energy Consumption on the District Heating Networks

Air-to-air heat pump: review of recent advances and future potential

Methodological Approach to Determining the Effect of Parallel Energy Consumption on District Heating System

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