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Ice detection in heat pumps and coolers. [By thermal resistance and capacitance detection]

Abstract

Some methods are discussed for detecting the formation of ice on the evaporators of air-source heat pumps and air coolers by electronic means. The sensing of thermal resistance caused by ice build-up can be done by measuring temperature differences between the evaporator and the air, and analyses are presented of the effect of using both linear and non-linear temperature sensors for this purpose. The direct detection of the presence of ice can be done by measuring the capacitance of a suitably-placed pair of plates, and the performance of such a system is analyzed. Preliminary reports are presented of the use of both of these methods of ice detection in the defrosting of an experimental heat pump.
Publication Date:
Jan 01, 1978
Product Type:
Journal Article
Reference Number:
ERA-03-028702; EPA-04-003157; EDB-78-060252
Resource Relation:
Journal Name: Int. J. Energy Res.; (United Kingdom); Journal Volume: 2:1
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 42 ENGINEERING; 29 ENERGY PLANNING, POLICY AND ECONOMY; AIR CONDITIONERS; ICE; HEAT PUMPS; REMOTE SENSING; BUILDINGS; CAPACITORS; CONTROL SYSTEMS; ELECTRONIC EQUIPMENT; EVAPORATORS; FROST; MEASURING METHODS; OPERATION; PLATINUM; RELIABILITY; THERMISTORS; APPLIANCES; ELECTRIC APPLIANCES; ELECTRICAL EQUIPMENT; ELEMENTS; EQUIPMENT; GAS APPLIANCES; HEAT EXCHANGERS; METALS; PLATINUM METALS; SEMICONDUCTOR DEVICES; TRANSITION ELEMENTS; 320100* - Energy Conservation, Consumption, & Utilization- Buildings; 420800 - Engineering- Electronic Circuits & Devices- (-1989); 298000 - Energy Planning & Policy- Consumption & Utilization
OSTI ID:
5202977
Research Organizations:
New Univ. of Ulster, Coleraine, Ireland
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: IJERD
Submitting Site:
TIC
Size:
Pages: 85-98
Announcement Date:

Citation Formats

Buick, T R, McMullan, J T, Morgan, R, and Murray, R B. Ice detection in heat pumps and coolers. [By thermal resistance and capacitance detection]. United Kingdom: N. p., 1978. Web. doi:10.1002/er.4440020109.
Buick, T R, McMullan, J T, Morgan, R, & Murray, R B. Ice detection in heat pumps and coolers. [By thermal resistance and capacitance detection]. United Kingdom. doi:10.1002/er.4440020109.
Buick, T R, McMullan, J T, Morgan, R, and Murray, R B. 1978. "Ice detection in heat pumps and coolers. [By thermal resistance and capacitance detection]." United Kingdom. doi:10.1002/er.4440020109. https://www.osti.gov/servlets/purl/10.1002/er.4440020109.
@misc{etde_5202977,
title = {Ice detection in heat pumps and coolers. [By thermal resistance and capacitance detection]}
author = {Buick, T R, McMullan, J T, Morgan, R, and Murray, R B}
abstractNote = {Some methods are discussed for detecting the formation of ice on the evaporators of air-source heat pumps and air coolers by electronic means. The sensing of thermal resistance caused by ice build-up can be done by measuring temperature differences between the evaporator and the air, and analyses are presented of the effect of using both linear and non-linear temperature sensors for this purpose. The direct detection of the presence of ice can be done by measuring the capacitance of a suitably-placed pair of plates, and the performance of such a system is analyzed. Preliminary reports are presented of the use of both of these methods of ice detection in the defrosting of an experimental heat pump.}
doi = {10.1002/er.4440020109}
journal = {Int. J. Energy Res.; (United Kingdom)}
volume = {2:1}
journal type = {AC}
place = {United Kingdom}
year = {1978}
month = {Jan}
}