WO1987007359A1 - Systeme de production d'eau chaude hygienique et sanitaire pour la consommation domestique - Google Patents

Systeme de production d'eau chaude hygienique et sanitaire pour la consommation domestique Download PDF

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Publication number
WO1987007359A1
WO1987007359A1 PCT/IT1987/000047 IT8700047W WO8707359A1 WO 1987007359 A1 WO1987007359 A1 WO 1987007359A1 IT 8700047 W IT8700047 W IT 8700047W WO 8707359 A1 WO8707359 A1 WO 8707359A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat pump
condenser
piping
electric resistance
water
Prior art date
Application number
PCT/IT1987/000047
Other languages
English (en)
Inventor
Alessandro Teti
Nicola Teti
Original Assignee
Alessandro Teti
Nicola Teti
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 Alessandro Teti, Nicola Teti filed Critical Alessandro Teti
Publication of WO1987007359A1 publication Critical patent/WO1987007359A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F24H4/04—Storage heaters

Definitions

  • This invention relates to a system for the production of hygienic and sanitary hot water for home consumption as alternative solution to traditional home water heaters utilizing heating electric resistance.
  • Three systems are available at present, the installation of which aims at saving 10 electric power in the production of hot water for hygienic and sanitary uses. They are the following:
  • the first system consists of a solar-collectors plant complete with all its components (i.e. solar collectors, circulating pump, water storage heater, piping, etc.). It has a more or less acceptable cost, but its efficiency is limited and strongly 2o affected by weather "caprices".
  • the water pressure in the pipeline network has to be at least 2 Kg./sqcm, this being the optimal value, above or below which the system efficiency decreases in a remarkable way;
  • the collector that contains the electric resistance has too small end section that can be easily obstructed by the precipitated lime.
  • the third solution concerns Dynamic-Type or static-Type Heat Pumps, more and more put to use.
  • Dynamic heat pumps are supplied with a ventilator and Static heat pumps are without ventilator.
  • the first ones make up 99% of today's industrial production. But as they have to be placed outside (i.e. balconies, terraces, garages, boiler rooms, l gardens) because of both noise and strong ventilation, important problems arises to the connection of the water storage heater that must be placed inside the apartment (fiat).
  • Static heat pumps because their staticity, can be installed inside the apartment,
  • the invention as claimed solves the problem utilizing a heat pump divided in two parts: 20 .
  • a separate incomplete unit heat pump comprising pump means connected with evaporator means, further connected able by piping connection to - a separate displaced/able condenser unit so made that it can integrally substitute the respective electric resistance of the existent electric resistance home water heater. 25
  • the remaining components of the heat pump i.e. evaporator, compressor, control equipment
  • the remaining components of the heat pump i.e. evaporator, compressor, control equipment
  • the dimensions of the case about 400 mm X 250 mm X 500 mm) are such that it can be easily placed in the bath-room of whatever ordinary apartment.
  • the condenser is a spiral-shaped copper pipe, and has a cylindric outside diameter equal to that of the sleeve that contains the electric resistance of the house water heater. Its length varies in connection with the water heater capacity (i.e. 50, 80, 100, 150 liters).
  • Condenser and heat pump unit are connected by means of two small pipes that have 6 mm outside diameter in order to complete the respective circuit filled with Freon.
  • each unit can be previously filled with Freon, also the respective piping connection can be prviously filled with Freon and joining means can be of automatic feature.
  • Electric absorption (and consequently consumption) of such an equipment reaches the amount of 240 to 270 watts/hr.; it is therefore equal to 1/5 of the absorption of the smallest electric resistance of the water heaters marketed today; operating cost are clearly cut down.
  • the installation of the equipment is quite simple, better yet is can be carried out even by do-it-yourself fans. In fact, after the water heater has been emptied of water, the electric resistance has just to be unscrewed, and the spiral-shaped condenser unit be screwed in its place. It is then sufficient to fix the partial heat pump unit to the wall and connect the two units by the Freon- filled piping connection.
  • Figure 1 is a frontal view in partial axial section of a traditional house water heater with electric resistance
  • Figure 2 is a side view in transverse partial section of the heat pump partial unit
  • Figure 3 is a schematic frontal view of how to connect the partial heat pump unit to the home electric water heater
  • Figure 4 is a frontal view of the respective condenser unit.
  • the air-water heat pump system consists of five basic parts. They are the following: - a separate box incomplete heat pump unit (A) comprising:
  • the air-to-water heat pump works quite simply: it takes away thermal energy from a "low-temperature” source (air in our case) and transfers it to water in the form of higher-temperature thermal energy.
  • the process here described takes place by means of air and the Freon that is contained in the circuit.
  • air flows to the evaporator (a) (in a natural way in static model, and in a forced way in dynamic ones by means of a ventilator), thus bringing about evaporation of Freon and the consequent increase in enthalpy.
  • Freon is sucked by the compressor (c) that, by compressing it, transfers its own energy (thermal equivalent of the compressor absorption) to the gas, the temperature of which increases.
  • Freon reaches the condenser (I) where, while condensing transfers heat to water of the home electric water heater (B) container.
  • the ratio of the energy supplied to water and the energy that drives the compressor makes up the basic measure of the efficiency of the heat pump.
  • Such ratio is known as "Coefficient Of Performance", of short COP.
  • the COP value of the static-type heat pumps is constant in time and made equal to 3,2 to 3,5 if they are installed in rooms with a mean temperature of +18°C to -20°C.
  • the respective ventilator influences the pump installation.
  • the pump efficiency becomes inconstant in time, since the pump is going to operate under varying air temperatures in the course of the year, with a lower limit of about 5°C to 6°C. Below this level, the COP value decreases so much that the use of the pump is no longer profitable.
  • the static model (without fan), can be installed inside the apartment without any trouble by virtue of its noiselessness (which resembles of a refrigerator) allowing to operate with higher COP value. This suggests to utilize a low speed fan to ventilate the evaporator of the respective heat pump partial unit.
  • the length of the condenser, and therefore its exchange capacity varies in connection with the home electric water heater (B) model in which it is fitted (i.e. 50, 80, 100, 150 Liters), whereas the outside diameter is constant and equal to the inside diameter of the sleeve on which the electric resistance is screwed.
  • the condenser will be mounted utilizing the loose flange.
  • the condenser unit utilizes a spiral copper tube that have a 6 mm outside diameter and 1 mm thick. Inside the condenser a blind copper tube is planned which has a 8 mm outside diameter and about 200 mm long. It contains temperature detecting means for regulating the water temperature.
  • the components of the heat pump partial unit are lodged in an enamelled or coated sheet-metal case that has- the following outside dimensions: about 400 mm X 250 mm X 500 mm.
  • the evaporator a) is of the copper-tube type fitted out with fins. Its dimensions are about 350 mm X 30 mm X 450 mm and it has a capacity of about 2600 Btu/hr.
  • the compressor (c) is of the hermetic type and has a 7 cc displacement and an electric absorption of 250 to 280 watts/hr. It is mounted on a metal plate that is fastened to a sheet-metal case. .
  • V volume of water to be heated
  • q Thermal equivalent of 1 Kw. (value: 3,448 BTU)
  • n Average efficiency of the system (it equals 0,90 when referred to the electric resistance, and 3,5 when referred to the heat-pump system)
  • the amount of energy consumed by the system of the invention is lower that that consumed by the electric resistance by a value of 74,29%

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

Un système, permettant de produire de l'eau de chauffage grâce à un système de pompe thermique et utilisant l'installation de chauffage d'eau (B) d'une maison, comprend un réservoir pour l'eau devant être chauffée (b), dans lequel une résistance électrique est ou peut être insérée (d). La caractéristique de la présente invention est que la pompe thermique en question se divise en deux parties: une pompe thermique incomplète (A) disposée dans une boîte séparée et comprenant un élément de pompe (c) relié à un élément évaporateur (a), relié ou pouvant être relié à une connexion de conduite (p, n); une unité de condenseur mobile séparée (I) conçue de telle sorte qu'elle peut entièrement remplacer la résistance électrique chauffante correspondante (d) de l'installation de chauffage d'eau existante d'une maison, ladite unité comprenant un élément de condenseur de conduite ayant une forme cylindrique spiralée (I).
PCT/IT1987/000047 1986-05-21 1987-05-21 Systeme de production d'eau chaude hygienique et sanitaire pour la consommation domestique WO1987007359A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT18003B/86 1986-05-21
IT1800386U IT8618003V0 (it) 1986-05-21 1986-05-21 Sistema per la produzione di acquacalda igienico-sanitaria per uso domestico che sostituisce integralmente la resistenza dei comuni scaldabagni elettrici,con il totale riutilizzo degli stessi;la sua utilizzazione consente un notevole risparmio nei costi di gestione

Publications (1)

Publication Number Publication Date
WO1987007359A1 true WO1987007359A1 (fr) 1987-12-03

Family

ID=11151660

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1987/000047 WO1987007359A1 (fr) 1986-05-21 1987-05-21 Systeme de production d'eau chaude hygienique et sanitaire pour la consommation domestique

Country Status (3)

Country Link
AU (1) AU7435487A (fr)
IT (1) IT8618003V0 (fr)
WO (1) WO1987007359A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20110102A1 (it) * 2011-03-03 2012-09-04 Rossato Group S R L Sistema combinato in pompa di calore
EP2735813A3 (fr) * 2012-11-22 2014-09-03 Energy Panel, S.L. Unité thermodynamique pour réservoirs de stockage d'eau chaude (DHW) et condensateur composite
FR3029273A1 (fr) * 2014-11-27 2016-06-03 Bdr Thermea Group Chauffe-eau thermodynamique a condenseur ou echangeur integre au ballon.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2469667A1 (fr) * 1979-11-09 1981-05-22 Energy Utilization Systems Inc Chauffe-eau
FR2475195A1 (fr) * 1980-02-06 1981-08-07 Bauknecht Gmbh G Reservoir de pompe de chaleur
EP0069676A1 (fr) * 1981-07-08 1983-01-12 SAUNIER DUVAL EAU CHAUDE CHAUFFAGE S.D.E.C.C. - Société anonyme Pompe à chaleur air-extérieur-eau

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2469667A1 (fr) * 1979-11-09 1981-05-22 Energy Utilization Systems Inc Chauffe-eau
FR2475195A1 (fr) * 1980-02-06 1981-08-07 Bauknecht Gmbh G Reservoir de pompe de chaleur
EP0069676A1 (fr) * 1981-07-08 1983-01-12 SAUNIER DUVAL EAU CHAUDE CHAUFFAGE S.D.E.C.C. - Société anonyme Pompe à chaleur air-extérieur-eau

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20110102A1 (it) * 2011-03-03 2012-09-04 Rossato Group S R L Sistema combinato in pompa di calore
EP2735813A3 (fr) * 2012-11-22 2014-09-03 Energy Panel, S.L. Unité thermodynamique pour réservoirs de stockage d'eau chaude (DHW) et condensateur composite
FR3029273A1 (fr) * 2014-11-27 2016-06-03 Bdr Thermea Group Chauffe-eau thermodynamique a condenseur ou echangeur integre au ballon.

Also Published As

Publication number Publication date
IT8618003V0 (it) 1986-05-21
AU7435487A (en) 1987-12-22

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