The effect of shallow depth horizontal ground loop clearance on the heat loss of a single family residential dwelling

Towards determining the effect of shallow depth horizontal ground loop clearance on the heat loss of a single family residential dwelling

10.32920/ryerson.14639094 ◽

2021 ◽

Author(s):

Felix Chen

Keyword(s):

Thermal Conductivity ◽

Heat Loss ◽

Three Dimensional ◽

Energy System ◽

Research Approach ◽

Single Family ◽

Simulation Based ◽

Foundation Wall ◽

Building Heat ◽

Ground Loop

Using solar energy stored in the ground to preheat incoming fresh ventilation air with ground loops is a renewable energy system which is becoming more frequently used in new residential developments. The purpose of this research was to examine the effect of ground loop to foundation wall clearance on building heat loss. Additionally, the thermal properties of the soil were examined to determine their impact on the ground loop’s effect on heat loss. A simulation based research approach was conducted using HEAT3, which is a three-dimensional transient heat transfer software. This study found that ground loop clearance had a larger impact on building heat loss for areas with low thermal conductivity soils than for areas with high thermal conductivity soils. On average, ground loop clearances of 10cm, 50cm, 100cm, and 200cm resulted in increased building heat losses of 20%-83%, 19%-55%, 16%-35%, and 12%-15% respectively.

Download Full-text

Yearly Heat Loss Analysis of a Heat Recovery Ventilator Unit for a Single-Family House in St. John’s, NL, Canada

European Journal of Electrical Engineering and Computer Science ◽

10.24018/ejece.2019.3.5.124 ◽

2019 ◽

Vol 3 (5) ◽

Author(s):

Rabbani Rasha ◽

M. Tariq Iqbal

Keyword(s):

Energy Consumption ◽

Heat Loss ◽

Heat Recovery ◽

Ventilation System ◽

Single Family ◽

Loss Analysis ◽

Increase Energy Efficiency ◽

Electricity Cost ◽

Air Infiltration ◽

Detached House

This paper represents an energy consumption and heat loss analysis of a heat recovery ventilator unit in a single-family detached house in St. John’s, NL, Canada. An energy-efficient house is a growing attraction to control the air infiltration, provide a comfortable environment with reduced yearly electricity cost. A mechanical induced ventilation system is inevitable to increase energy efficiency and to reduce greenhouse gas emissions of the house in order to supply fresh air. A heat recovery ventilator (HRV) is an air to air heat exchangers that recovers heat from inside of the house and delivers this preheated and fresh air to the space for maintaining the occupant’s comfort. In this paper, yearly energy consumption with the heat loss of a typical heat recovery ventilator unit is presented. MATLAB, BE opt, and Microsoft Excel are used to do all necessary simulation with calculation using one-year logged data. Methodology, results with graphs and detailed analysis of this research are included in this paper. This research indicates that the cost of running a HRV for a year in a house in St. John’s could be as high as $484 per year with an unknown air quality improvement.

Download Full-text

Pipe Sizing for Novel Heat Distribution Technology

Energies ◽

10.3390/en12071276 ◽

2019 ◽

Vol 12 (7) ◽

pp. 1276 ◽

Cited By ~ 4

Author(s):

Helge Averfalk ◽

Fredric Ottermo ◽

Sven Werner

Keyword(s):

Heat Loss ◽

Flow Rate ◽

Pressure Loss ◽

Distribution Network ◽

Heat Distribution ◽

Single Family ◽

The Third

This paper assesses pipe sizing aspects for previously proposed, novel, low heat distribution technology with three pipes. Assessment issues include heat loss, pressure loss, and pipe sizing for different typical pipe configurations. This assessment has been provided by the analysis of a case area with single-family houses. Concerning heat loss, the proposed three-pipe solutions have the same magnitude of heat loss as conventional twin pipes, since lower return temperatures compensate for the larger heat loss area from the third pipe. Regarding pressure loss, the main restriction on the size of the third pipe is limited to the pressure loss in the third pipe. Thermostatic valves to manage the flow rate of the third pipe are advocated, since alternative small pumps have not been found to be commercially available. The pipe sizing recommendation is that the third pipe for recirculation purposes can be two to three standard pipe sizes smaller than the corresponding supply and return pipe, if no prosumer is connected in the heat distribution network.

Download Full-text

Overall heat loss coefficient and domestic energy gain factor for single-family buildings

Building and Environment ◽

10.1016/s0360-1323(01)00094-4 ◽

2002 ◽

Vol 37 (11) ◽

pp. 1019-1026 ◽

Cited By ~ 22

Author(s):

T. Olofsson ◽

S. Andersson

Keyword(s):

Heat Loss ◽

Gain Factor ◽

Energy Gain ◽

Loss Coefficient ◽

Single Family ◽

Domestic Energy ◽

Overall Heat Loss Coefficient

Download Full-text

Comparisons of Auditory Brainstem Responses Between a Laboratory and Simulated Home Environment

Journal of Speech Language and Hearing Research ◽

10.1044/2020_jslhr-20-00383 ◽

2020 ◽

Vol 63 (11) ◽

pp. 3877-3892

Author(s):

Ashley Parker ◽

Candace Slack ◽

Erika Skoe

Keyword(s):

Home Environment ◽

Signal To Noise Ratio ◽

Auditory Brainstem ◽

Auditory Brainstem Responses ◽

Single Family ◽

Adult Participants ◽

Simulated Home Environment ◽

Brainstem Response ◽

Research Populations ◽

Response Consistency

Purpose Miniaturization of digital technologies has created new opportunities for remote health care and neuroscientific fieldwork. The current study assesses comparisons between in-home auditory brainstem response (ABR) recordings and recordings obtained in a traditional lab setting. Method Click-evoked and speech-evoked ABRs were recorded in 12 normal-hearing, young adult participants over three test sessions in (a) a shielded sound booth within a research lab, (b) a simulated home environment, and (c) the research lab once more. The same single-family house was used for all home testing. Results Analyses of ABR latencies, a common clinical metric, showed high repeatability between the home and lab environments across both the click-evoked and speech-evoked ABRs. Like ABR latencies, response consistency and signal-to-noise ratio (SNR) were robust both in the lab and in the home and did not show significant differences between locations, although variability between the home and lab was higher than latencies, with two participants influencing this lower repeatability between locations. Response consistency and SNR also patterned together, with a trend for higher SNRs to pair with more consistent responses in both the home and lab environments. Conclusions Our findings demonstrate the feasibility of obtaining high-quality ABR recordings within a simulated home environment that closely approximate those recorded in a more traditional recording environment. This line of work may open doors to greater accessibility to underserved clinical and research populations.

Download Full-text