Increasing solar gains by using hot water to heat dishwashers and washing machines

Document identifier: oai:dalea.du.se:2123
Access full text here:10.1016/j.applthermaleng.2006.05.027
Keyword: Engineering and Technology, Civil Engineering, Teknik och teknologier, Samhällsbyggnadsteknik, Dishwasher; Clothes washer; Washing machine; Domestic appliances; Solar heating system; Solar combisystem; Solar hot water system; SDHW; System design.
Publication year: 2007
Relevant Sustainable Development Goals (SDGs):

The SDG label(s) above have been assigned by OSDG.ai

Abstract:

70 to 90% of the electric energy used by dishwashers and washing machines heats the water, the crockery, the laundry and the machine and could just as well be replaced by heating energy from solar collectors, district heating or a boiler. A dishwasher and a washing machine equipped with a heat exchanger and heated by a hot water circulation circuit instead of electricity (heat-fed machines) have been simulated together with solar heating systems for single-family houses in two different climates (Stockholm, Sweden and Miami, USA). The simulations show that a major part of the increased heat load due to heat-fed machines can be covered by solar heat both in hot and cold climates if the collector area is compensated for the larger heat load to give the same marginal contribution. Using ordinary machines connected to the hot water pipe (hot water-fed machines) and using only cold water for the rinses in the washing machine gives almost the same solar contribution; however considerably lower electrical energy savings are achieved. The simulations also indicate that improvements in the system design of a combisystem (increased stratification in the store) are more advantageous if heat-fed machines are connected to the store. Thus, using heat-fed machines also encourages the use of more advanced solar combisystems.

Authors

Tomas Persson

Högskolan Dalarna; Miljöteknik
Other publications >>

Mats Rönnelid

Högskolan Dalarna; Miljöteknik
Other publications >>

Record metadata

Click to view metadata

	
    header: 
        identifier: oai:dalea.du.se:2123
        datestamp: 2021-04-15T13:01:38Z
        setSpec: SwePub-du
    metadata: 
        mods: 
            @attributes: 
                version: 3.7
            recordInfo: 
                recordContentSource: du
                recordCreationDate: 2006-05-23
            identifier: 
                http://urn.kb.se/resolve?urn=urn:nbn:se:du-2123
                10.1016/j.applthermaleng.2006.05.027
            titleInfo: 
                @attributes: 
                    lang: eng
                title: Increasing solar gains by using hot water to heat dishwashers and washing machines
            abstract: 
70 to 90% of the electric energy used by dishwashers and washing machines heats the water the crockery the laundry and the machine and could just as well be replaced by heating energy from solar collectors district heating or a boiler. A dishwasher and a washing machine equipped with a heat exchanger and heated by a hot water circulation circuit instead of electricity (heat-fed machines) have been simulated together with solar heating systems for single-family houses in two different climates (Stockholm Sweden and Miami USA). The simulations show that a major part of the increased heat load due to heat-fed machines can be covered by solar heat both in hot and cold climates if the collector area is compensated for the larger heat load to give the same marginal contribution. Using ordinary machines connected to the hot water pipe (hot water-fed machines) and using only cold water for the rinses in the washing machine gives almost the same solar contribution; however considerably lower electrical energy savings are achieved. The simulations also indicate that improvements in the system design of a combisystem (increased stratification in the store) are more advantageous if heat-fed machines are connected to the store. Thus using heat-fed machines also encourages the use of more advanced solar combisystems.

            subject: 
                    @attributes: 
                        lang: eng
                        authority: uka.se
                    topic: 
                        Engineering and Technology
                        Civil Engineering
                    @attributes: 
                        lang: swe
                        authority: uka.se
                    topic: 
                        Teknik och teknologier
                        Samhällsbyggnadsteknik
                    @attributes: 
                        lang: eng
                    topic: Dishwasher; Clothes washer; Washing machine; Domestic appliances; Solar heating system; Solar combisystem; Solar hot water system; SDHW; System design.
            language: 
                languageTerm: eng
            genre: 
                publication/journal-article
                ref
            note: 
                Published
                2
            name: 
                    @attributes: 
                        type: personal
                        authority: du
                    namePart: 
                        Persson
                        Tomas
                    role: 
                        roleTerm: aut
                    affiliation: 
                        Högskolan Dalarna
                        Miljöteknik
                    nameIdentifier: tpe
                    @attributes: 
                        type: personal
                        authority: du
                    namePart: 
                        Rönnelid
                        Mats
                    role: 
                        roleTerm: aut
                    affiliation: 
                        Högskolan Dalarna
                        Miljöteknik
                    nameIdentifier: mrd
            originInfo: 
                dateIssued: 2007
                publisher: Elsevier
            relatedItem: 
                @attributes: 
                    type: host
                titleInfo: 
                    title: Applied Thermal Engineering
                identifier: 
                    1359-4311
                    1873-5606
                part: 
                    detail: 
                            @attributes: 
                                type: volume
                            number: 27
                            @attributes: 
                                type: issue
                            number: 2-3
                    extent: 
                        start: 646
                        end: 657
            physicalDescription: 
                form: print
            typeOfResource: text