GB937248A - Improvements in and relating to apparatus for determining the percentage heat loss in boiler or like furnaces - Google Patents

Improvements in and relating to apparatus for determining the percentage heat loss in boiler or like furnaces

Info

Publication number
GB937248A
GB937248A GB4296060A GB4296060A GB937248A GB 937248 A GB937248 A GB 937248A GB 4296060 A GB4296060 A GB 4296060A GB 4296060 A GB4296060 A GB 4296060A GB 937248 A GB937248 A GB 937248A
Authority
GB
United Kingdom
Prior art keywords
percentage
fuel
resistor
flue gases
boiler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4296060A
Inventor
Frederick Donald Fisher
Keith Malcolm Howell
Gilbert Jessop
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cambridge Instruments Ltd
Original Assignee
Cambridge Instruments Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cambridge Instruments Ltd filed Critical Cambridge Instruments Ltd
Priority to GB4296060A priority Critical patent/GB937248A/en
Publication of GB937248A publication Critical patent/GB937248A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
    • G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
    • G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/021—Particular circuit arrangements

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Immunology (AREA)
  • Pathology (AREA)

Abstract

937,248. Electric analogue calculating. CAMBRIDGE INSTRUMENT CO. Ltd. Sept. 29, 1961 [Dec. 14, 1960], No. 42960/60. Class 37. [Also in Group XXXVIII] The invention is concerned with determining the efficiency of a boiler by measurement of the rise in temperature of the flue gases (t), the percentage of carbon (c) and hydrogen (h) in the fuel, the weight (w) in grams of water per 100 grams of fuel, the percentage (x) of free oxygen in the dry flue gases, the percentage (r) of combustibles in the dry flue gases and the calorific value of the fuel H. The percentage heat loss is said to be given approximately by The Figure shows an apparatus for evaluating the equation. Firstly the quantity x is evaluated by a magnetic oxygen meter 1 which produces an output reversed in polarity to that of a battery 4 to produce a current proportional to 21 - x. The current flows through a resistor 8 set in accordance with the calorific power of the fuel to develop a voltage representing the bottom term of the equation and apply it across a potentiometer slide wire 7. The first of the three top terms is developed as a voltage from thermocouples in the boiler air supply and flue gases or a resistance thermometer and multiplied by a resistor 12 in two parts set respectively to c and h. The value r is determined from a Katharometer 13 which may be as described in Application No. 19615/61 multiplied by c and h values in a two-part resistor 14. The third term in the top of the equation is converted into a voltage by allowing the current 21 - x to flow through a resistor set in accordance with h and w. The three voltages thus developed are applied in series to the potentiometer by a servo amplifier 10 and slider 9. The potentiometer is self-balancing and the position of the slider gives boiler efficiency.
GB4296060A 1960-12-14 1960-12-14 Improvements in and relating to apparatus for determining the percentage heat loss in boiler or like furnaces Expired GB937248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4296060A GB937248A (en) 1960-12-14 1960-12-14 Improvements in and relating to apparatus for determining the percentage heat loss in boiler or like furnaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4296060A GB937248A (en) 1960-12-14 1960-12-14 Improvements in and relating to apparatus for determining the percentage heat loss in boiler or like furnaces

Publications (1)

Publication Number Publication Date
GB937248A true GB937248A (en) 1963-09-18

Family

ID=10426720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4296060A Expired GB937248A (en) 1960-12-14 1960-12-14 Improvements in and relating to apparatus for determining the percentage heat loss in boiler or like furnaces

Country Status (1)

Country Link
GB (1) GB937248A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423487A (en) 1979-11-23 1983-12-27 Neotronics Limited Apparatus for measuring the efficiency of combustion appliances
US4481168A (en) * 1983-02-23 1984-11-06 Pavlodarsky Industrialny Institut Device for determining heat losses due to incomplete fuel combustion
US4565788A (en) * 1983-02-23 1986-01-21 Milovidov Boris A Method of determining heat losses due to incomplete fuel combustion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423487A (en) 1979-11-23 1983-12-27 Neotronics Limited Apparatus for measuring the efficiency of combustion appliances
US4481168A (en) * 1983-02-23 1984-11-06 Pavlodarsky Industrialny Institut Device for determining heat losses due to incomplete fuel combustion
US4565788A (en) * 1983-02-23 1986-01-21 Milovidov Boris A Method of determining heat losses due to incomplete fuel combustion

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